Wordwide volcano activity – Archive June 8 until August 20, 2013

Last update: August 27, 2013 at 8:58 pm by By

This is an archived part of our Daily Volcano Activity report.
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This report was compiled out of many information sources by Armand Vervaeck, Jens Skapski, Georges Vitton and Rodger Wilson
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After Rodger Wilson was obliged to discontinue his daily participation at this site, we have decided to start up an El Hierro type article. The newest additions will always be on top and if the article gets too long, we will cut off a part of it and archive it. This url will always be the one to follow and if you leave our page open in your browser, the page will refresh every 60 minutes automatically.
Please be a little patient with this new format.
This report is compiled out of many information sources by Georges Vitton, Rodger Wilson, Armand Vervaeck and Jens Skapski.


Rodger Wilson volcano overview of August 20
I forgot to mention that AVO personnel observed active lava flows (to the base of the intra-caldera cone) during an overflight yesterday at Veniaminof volcano (Alaska Peninsula) (station VNWF). Volcanic tremor accompanying lava emission continues at the volcano today.

A period of strong ash gas and ash venting has just ended at Sakurajima volcano (Kyushu Island, Japan).

Sakurajima_20130821

Well, with no clear precursor, White Island volcano (New Zealand) erupted yesterday. Maybe the full moon gave the magmatic system that added alittle something to get it over the brink!

Elsewhere,…

Small earthquakes continue in the shallow (at Mount Hood) and mid-crust (at Mount Saint Helens) beneath the Washington-Oregon Cascade arc. In 1979, almost exactly a year to the day before MSH awakened, an earthquake swarm began in the deep crust (~20 km) north-northwest of the volcano. The earthquake sequence continued, ebbing and flowing for much of the following year. The 1979 earthquakes were much stronger (magnitudes reached M4.0+) than ones comprising the current “nest” of earthquakes northwest of the volcano (maximum magnitude M3.1), but they point-out that one should not just “write-off” local “tectonic” activity near volcanoes as being “unrelated” to fluid/magmatic movement. As previously stated, in less than a year from the 1979 earthquake, magnitude M4.0 earthquakes commenced 15-20 km to the south at MSH (and the rest is history!).

Essentially continuous volcanic tremor (indicative of magma intrusion into the cone) now affect Popocatepetl volcano (Mexico).

Activity remains high at the Guatemalan volcanoes: Pacaya (station PCG), Fuego (FG3), and Santiaguito Dome Complex (Santa Maria volcano) (station STG3). At Pacaya, low-level strombolian explosions continue (with a relatively high level of tremor), frequent vulcanian explosions have occurred at Santa Maria volcano the past week, and small strombolian explosions accompany lava extrusion at Fuego volcano.

Santiaguito_20130820

Pulses of volcano-tectonic earthquakes appear on the ebb again at Momotombo volcano (Nicaragua) (station MOMN). Maybe this volcano was also reacting to the approach of the current full moon(?),

Volcano-tectonic earthquakes remain at a higher level at Turrialba volcano (Costa Rica) (station VTUC).

Small VT events also continue at a higher rate at Cumbal volcano (Colombia) (station MEVZ). Small gas and ash emission events are visible on current seismograms from Galeras volcano (station CUVZ).

Volcanic earthquakes have eased in number and magnitude again at Tungurahua volcano (Ecuador) (station RETU),…but they have not gone away!


Rodger Wilson volcano overview of August 19
The anomalous regional seismicity in Southern Washington (…and now Northern Oregon!) State is likely a result of the interplay between tectonic blocks with the Mount Saint Helens, Mount Rainier and Mount Hood magmatic systems and thus may be considered longer-term (months?, years? decades?) precursory activity. So, as long as the seismicity continues, I will probably report it, as well as similar activity elsewhere, although I am less familiar with what is “anomalous” at other points on the globe (i.e. the seismicity near Sabancaya, Peru and currently at Momotombo, Nicaragua).

Anyhow,…here are the volcanoes I am looking at with special interest.

Veniaminof volcano (Alaska Peninsual) (station VNWF) continues to tremble with moderate to strong volcanic tremor. AVO personnel are planning an overflight of Veniaminof today to verify that surface activity continue in-conjunction with the high level of seismicity at the volcano.

Both shallow and mid-crustal earthquakes remain unusually frequent beneath and around Mount Saint Helens, Mount Rainier (both Cascade arc) (WA), and Mount Hood (Cascade arc) (OR) (station TDH) volcanoes.

Volcanic tremor is now mostly continuous within Popocatepetl volcano (Mexico), though surface activity has remained subdued.

popo_0819133

Activity (in the form of volcanic tremor, small explosions, and in the case of Fuego, lava extrusion) at the Guatemalan volcanoes: Pacaya (station PCG), Fuego (station FG3), and Santa Maria (station STG3) remains high.

Swarm seismicity continues in pulses at Momotombo volcano (Nicaragua) (station MOMN).

After diminishing to background level through last weekend, seismicity at Turrialba volcano (Costa Rica) (station VTUC) has returned to a high level (including episodes of volcanic tremor).

Small earthquakes remain frequent at Cumbal volcano (Colombia) (station MEVZ) following an earthquake swarm at the volcano last week.

Volcanic earthquakes, though diminished in number and intensity, continue in what is an unusually protracted “cool-down” period following last month’s eruptions at Tungurahua volcano (Ecuador) (station RETU).


Rodger Wilson volcano overview of August 17
After experiencing numerous small seisms throughout last week, a significant earthquake swarm is underway at Momotombo volcano (Nicaragua) (station MOMN). The swarm appears to be occurring in pulses (given the patchy seismograms offered by INETER) and is not an aftershock sequence like we observed at the volcano earlier this summer.

Also, a lahar (mudflow) occurred at Fuego volcano (Guatemala) (station FG3) late yesterday following moderate to heavy rainfall at the volcano. The lahar produced the “loud” tremor-like signal on the attached seismogram.

Minor glacier flood in Kverkfjöll volcano, Iceland - (July 17 – 07:43 UTC)
In a announcement from Icelandic Meteorological Office, an minor glacier flood has now taking place from Kverkfjöll volcano, it appears to have started yesterday (15-August-2013). This is one of the minor glacier lakes in Kverkfjöll volcano. This glacier flood in minor and the water levels are not expected to reach more than normal summer level in the glacier river the flood is going into. The glacier river is called Volga and is a glacier river from Kverkfjöll volcano glacier area.

This Iceland Met image from earlier activity at Gimsvotn to show our readers the location of the Kverkfjöll volcano.

This Iceland Met image from earlier activity at Gimsvotn to show our readers the location of the Kverkfjöll volcano.

Currently Icelandic Meteorological Office is taking a trip over Kverkfjöll volcano to see the local changes and what is exactly is going on. Current status of the glacier flood is not well known, but latest report suggested that some subsiding was taking place, if that is because the glacier flood is over or something else is taking place I am not sure about at present time.

Update 1: Icelandic Civil Protection has confirmed that steam explosion took place in Kverkfjöll volcano following the glacier flood (due to sudden pressure release) that took place during the night and in the morning.
Source of this article (also for the next updates) : Iceland geology blog

Rodger Wilson volcano overview of August 16
Volcanic tremor and eruptive activity (verified by satellite thermal imagery) is sustained at Veniaminof volcano (Alaska Peninsula) (station VNWF).

Small (mostly non-locateable) earthquakes continue at Mount Hood volcano (Cascade arc) (OR) and more recently (today!), Three Sisters Volcanic Center to the south of Hood. Small (but locateable) earthquakes continue near Lassen Peak volcano (Cascade arc) (CA) and along the southern boundary of Long Valley Caldera (CA) (station MCS).

Volcanic tremor, small volcano-tectonic earthquakes and emission events persist at Popocatepetl volcano (Mexico). The larger signals on the Popo record are teleseismic and regional earthquake waves.

popo0816131

Pacaya volcano (Guatemala) (station PCG) again burst into a full-fledged strombolian eruption early today. A nearby village was temporarily evacuated due to the danger from scoria fallout from the eruption. Meanwhile, Fuego volcano (station FG3) is emitting a new lava flow from its summit vent. Degassing events and volcanic tremor remain elevated at Santa Maria volcano (tstaion STG3).

Fuego_20130816

Small volcano-tectonic earthquakes continue near Momotombo volcano (Nicaragua) (station MOMN), while volcanic earthquakes periodically increase in number and magnitude at San Cristobal volcano (station CRIN).

Numbers of volcano-tectonic events are down at Turrialba volcano (Costa Rica) (station VTUC), but event magnitudes have increased slightly.

Another volcano-tectonic earthquake swarm struck Cumbal volcano (Colombia) (station MEVZ) overnight (the second in a week). Small VT earthquakes are also rattling Galeras volcano (station CUVZ) at this time.

Volcanic earthquakes persist at Tungurahua volcano (Ecuador) (station RETU) but brief glimpses of the volcano through typical Andean inclement weather indicates the volcano only to be steaming vigorously.


 

Rodger Wilson volcano overview of August 15
Veniaminof volcano (Alaska Peninsula) (station VNWF) rumbles-on today with strong volcanic tremor and presumably, eruptive activity.

Earthquake activity continues both at and near Cascade arc (WA and OR) volcanoes: Mounts Saint Helens, Rainier and Hood. Earthquake activity has recently also become more frequent near Lassen Peak volcano (Cascade arc) (CA). Small earthquakes continue along the southern boundary of Long Valley Caldera (CA) (station MCM) today as well.

Low level volcanic tremor and small volcano-tectonic earthquakes tremble within Popocatepetl volcano (Mexico). The volcano has shown slowly increasing internal and external activity over the past week.

popo0815133

Activity at Guatemalan volcanoes Fuego (station FG3), Pacaya (station PCG), and Santa Maria (station STG3) remians elevated with small explosions and volcanic tremor (and hybrid earthquakes at Santa Maria) at each.

Small volcano-tectonic events continue near Momotombo volcano (Nicaragua) (station MOMN) and a flurry of volcanic earthquakes rumbled within Cerro Negro volcano (station CNGN) overnight.

Just when it looked like the recent seismic crisis at Turrialba volcano (Costa Rica) (station VTUC) was over, earthquake activity perked back up at the volcano in the past 24 hours.

Small explosions are apparent again today on seismograms from Galeras volcano (Colombia) (station CUVZ).

Volcanic earthquakes persist at Tungurahua volcano (Ecuador) (station RETU), but there has been no indication of eruptive activity (other than strong steaming) at the volcano this past week.


 

Rodger Wilson volcano overview of August 14
Volcanic tremor (and presumably, eruptive activity!) is going strong today at Veniaminof volcano (Alaska Peninsula) (station VNWF).

An earthquake swarm began last night at Mount Hood volcano (Cascade arc) (OR) (station TDH). Thus far, about 30 small events have occurred at the southwest foot of the cone, the largest (so far!) having a magnitude of M1.5. Small earthquakes also continue within a mid-crustal “nest” located northwest of Mount Saint Helens volcano (WA).

MSH_Mount_Hood_earthquakes_20130814

Small earthquakes continue to be frequent along the southern margin of Long Valley caldera (CA) (station MRD). Today most of the events are occurring in the vicinity of Mammoth Mountain volcano.

An episode of high amplitude volcanic tremor accompanied ash emission at Popocatepetl volcano (Mexico) last night. Tremor continues at a lower amplitude at the volcano this morning.

imagenPopoTochimilco_20130814

Volcanic tremor (or possible just wind!) affects Guatemalan volcano Fuego (station FG3) and Pacaya (station PCG) today. Hybrid earthquakes shake the nearby Santiaguito Dome Complex (Santa Maria volcano) (station STG3).

Another pulse of volcano-tectonic earthquakes struck near Momotombo volcano (Nicaragua) (station MOMN).

Seismicity has ebbed considerably in strength at Turrialba volcano (Cosat Rica) (station VTUC) over the past week, but continues.

A felt earthquake (magnitude M2.8) occurred in the past hour at Nevado Del Ruiz volcano (Colombia) (station AFBZ), a further increase in seismic activity which began at the volcano late last week. Signals indicative of small gas and ash emissions are visible on records from Galeras volcano (station CUVZ).

Tungurahua volcano (Ecuador) (station RETU) finally seems to have settled back into slumber (for the time being!) if the seismic record can be trusted.

White Island volcano (New Zealand) continues to be plagued by unsteady volcanic tremor today.


 

Rodger Wilson volcano overview of August 13
No, it’s not wind this time! Volcanic tremor at Veniaminof volcano (Alaska Peninsula) (station VNWF) gradually increased in intensity through the day yesterday and eruptive activity returned at the central cone shortly thereafter.

Veniaminof_20130812

Small earthquakes (magnitudes generally < M1.0) continue in the mid-crust northwest of Mount Saint Helens volcano (Cascades arc) (WA).

More earthquake-like signals recorded at Newberry volcano (Cascades arc) (OR) (station CPCO) last night, following what I believe is seismic “noise” generated by a passing weather front (thunderstorms).

I missed a magnitude M3.0 earthquake at Lassen Peak volcano (Cascades arc) (CA) which occurred on Sunday.

Numerous small earthquakes continue along the southern boundary of Long Valley Caldera (CA) (station MCM).

Small, volcano-tectonic events and low-magnitude tremor continue to be frequent at Popocatepetl volcano (Mexico) today. The volcano doesn’t seem to be “bothered” by the M6.5 Colombian earthquake (the smaller of two large signals at end of record) nor a magnitude M5.4 regional earthquake (the largest signal on record).

The Guatemalan volcanoes: Fuego (FG3), Pacaya (station PCG), and Santiaguito (station STG3) remain animated today with elevated levels of volcanic tremor and frequent explosions and rockfalls (at Santiaguito).

Periods of elevated volcanic tremor continue to visit Concepcion volcano (Nicaragua) (station CONN) and small volcano-tectonic earthquakes remain apparent of seismic records from Momotombo volcano (station MOMN).

Volcanic earthquakes now punctuate unstable volcanic tremor at San Miguel volcano (El Salvador) (station VSM).

Feeble volcanic and volcano-tectonic earthquake activity continues at Turrialba volcano (Costa Rica). The Turrialba volcanocam shows a thick plume of water vapor and sulfurous gas issuing from several vents near the summit of the volcano.

Numerous small volcanic earthquakes persist at Tungurahua volcano (Ecuador) (station RETU).

Tungurahua_20130813

Unstable volcanic tremor affects White Island volcano (New Zealand) for another day.


 

Rodger Wilson volcano overview of August 12

Paluweh (Rokatenda Meletus) volcano update Indonesia (av) : 3 of the missing people have not yet been found and SAR teams are more and more doubting about their presence. Accordingly the death toll will be 3 and 3 missing. All the other islanders are now in temporary shelters on the other islands. The Indonesian authority BNPB is very skilled in organizing such evacuations as they happen regularly in the dangerous perimeters of the many volcanoes they have all over the country.

Low-level seismicity continues (minus eruptive activity) at Veniaminof volcano (Alaska Peninsula) (station VNWF) today.

Mid- to deep crustal seismicity continues in the northeast-trending corridor between Mount Saint Helens and Mount Rainier volcanoes (Cascade arc) (WA). Today, a magnitude M3.0 earthquake struck north of MSH, along with continued small quakes located in a mid-crustal “nest” northwest of the volcano.

Mount_Saint_Helens-Mount_Rainier_seismicity_20130812

Numerous small earthquakes continue to jostle the southern boundary of Long Valley Caldera (CA) (station MCM).

Background seismicity (mainly in the form of low-level volcanic tremor) continues to be elevated at Popocatepetl volcano (Mexico). The Popo volcanocam currently shows a white plume rising above the volcano.

imagenPopoTochimilco_20130812

Periods of volcanic tremor affect Fuego volcano (Guatemala) (station FG3) today. A moderate-sized explosion occurred late yesterday at Santiaguito Dome Complex (Santa Maria volcano) (station STG3).

Volcanic tremor has declined in strength at San Miguel volcano (El Salvador) (station VSM) overnight.

Small volcano-tectonic earthquakes continue to rattle Cumbal volcano (Colombia) (station MEVZ).

Volcanic seismicity is rapidly weakening now at Tungurahua volcano (Ecuador) (station RETU). A recent (yesterday) glimpse of the volcano from behind rain clouds indicates continued moderate degassing from the vent.

Tungurahua_20130812

Unstable volcanic tremor continues at White Island volcano (New Zealand).


 

Rodger Wilson volcano overview of August 11
Volcanic seismicity continues at a reduced level at Veniaminof volcano (Alaska Peninsula) (station VNWF) today, but there are no recent reports of eruptive activity continuing at the volcano.

The “nest” of mid-crustal earthquakes northwest of Mount Saint Helens volcano (Cascade arc) (WA) continues to hum with small events today.

Earthquake activity remains elevated along the southern boundary of Long Valley Caldera (CA) (station MCM).

Sustained low-level volcanic tremor, punctuated with emission events, colors seismograms from Popocatepetl volcano (Mexico). The volcano currently emits a large, dense, white (SO2) gas plume.

The Guatemalan volcanoes: Pacaya (station PCG), Fuego (station FG3) and Santiaguito (station STG3) continue to exhibit elevated seismicity/eruptive activity today.

Santiaguito_20130811

After subsiding overnight, volcanic tremor is again elevated at San Miguel volcano (El Salvador) (station VSM).

Volcano-tectonic earthquakes continue at Momotombo volcano (Nicaragua) (station MOMN). Amplitudes and numbers of volcanic earthquakes have become unstable at San Cristobal volcano (station CRIN).

The OVSICORI website was unnaccessible at the time of this writing (to check on current activity at Turrialba volcano).

Seismicity remains elevated at Nevado Del Ruiz volcano (Colombia) (station OLLZ), though event amplitudes have diminished. Small volcano-tectonic events continue at both Galeras (station CUVZ) and Cumbal (station MEVZ) volcanoes.

Volcanic earthquakes rumble-on within/beneath Tungurahua volcano (Ecuador) (station RETU). The volcano continues to emit a dense, mostly white gas plume.

Volcanic tremor is unsteady at White Island volcano (New Zealand) today.

Rokatenda volcano (Paluweh), Indonesia explosion update – (August 11 18:30 UTC)
BMKG has released the following picture of the raging hot pyroclastic flow.

Image courtesy BMKG Indonesia (via lensaindonesia.com)

Image courtesy BMKG Indonesia (via lensaindonesia.com)

Rokatenda volcano (Paluweh), Indonesia explosion update – (August 11 08:51 UTC)
The death toll of this eruption still stands at 6 (in fact the bodies of 4 people have been found but the 2 remaining are still missing).
Based on local reports, we have made a map showing the locations of the most severely hit villages in relation to the volcano. Based on these maps we would believe in a scenario that the western part of the crater must have been exploded. Both most hit villages are located at the end of broad river valleys who can be seen as good pyroclastic flow carriers.
We are anxious to see pictures from both

Screen Shot 2013-08-11 at 10.40.49

Screen Shot 2013-08-11 at 10.39.06


 

Rodger Wilson volcano overview of August 10

Sad news from Indonesia where a dome collapse of the Rokatenda Meletus or Paluweh volcano (with vertical explosion?) produced a large pyroclastic flow that overtook six people, including some children. This is likely the result of the infamous “familiarity breeds contempt” syndrome where the local population becomes complacent near a growing lava dome. Lava dome activity is characterized by days, weeks, months of small, piecemeal rockfalls and collapses, punctuated by large wholesale collapses which most commonly occur with no forewarning activity of any kind. Again,…sad!

130810141406-indonesia-mount-rokatenda-story-top

Given the weakening seismicity (and cooled surface temperatures) over the past week, AVO scientists believe eruption may have ended (temporarily?) at Veniaminof volcano (Alaska Peninsula) (station VNWF). Tiny shallow earthquakes continue to mix with tiny deep earthquakes at Mount Spurr volcano (Alaska Range) (station CKT).

Earthquakes continue within the northeast-trending zone that stretches from near Mount Saint Helens to east of Mount Rainier volcano (Cascades arc) (WA).

Numerous small earthquakes frequent a zone along the southern margin of Long Valley Caldera (CA) (station MCM) again today.

Background volcanic tremor has risen within/beneath Popocatepetl volcano (Mexico).

Popocatepetl_20130810b

The Guatemalan volcanoes: Fuego (station FG3), Pacaya (station PCG), and Santiaguito (station STG3) are more active today, exhibiting explosion, rockfall and degassing signals.

Santiaguito_20130810

A burst of volcano-tectonic earthquakes occurred overnight at Momotombo volcano (Nicaragua) (station MOMN). San Cristobal volcano (station CRIN) continues to “chug” with numerous volcanic earthquakes. Periods of harmonic tremor reverberate from Concepcion volcano (station CONN) and low-magnitude volcanic earthquakes have become apparent on seismograms at Cerro Negro volcano as well.

Volcanic tremor has eased the past few hours at San Miguel volcano (El Salvador) (station VSM).

Volcano-tectonic earthquakes remain frequent at Turrialba volcano (Costa Rica) (station VTUC).

Seismicity has increased dramatically at Nevado Del Ruiz volcano (Colombia) (station OLLZ) with numerous volcano-tectonic events during the past 24 hours. An swarm of small volcano-tectonic earthquakes also struck Cumbal volcano (station MEVZ) overnight.

Volcanic earthquakes continue to be numerous at Tungurahua volcano (Ecuador) (station RETU).

Banded volcanic tremor remains elevated at White Island volcano (New Zealand).

Pyroclastic flow from Rokatenda Meletus (Paluweh) volcano kills 6 people

Bad luck and not following the guidelines of the Indonesian Volcanologic Agency (PVMBG) have cost the life of 6 people sleeping in houses along a river on the volcanic Island (to be confirmed as reports are not always telling the same). Mount Paluweh or Rokatenda is erupting with fierce explosions for many months. The status of the volcano is Siaga (level 3 on 4) or Stand-By, the second highest dangerous status but nothing unusual in Indonesia. Many volcanoes do have this status. The authorities have asked people (locals and tourists alike) NOT to enter a 3 km radius from the crater AND to stay away from river valleys as pyroclastic flows do generally follow river valleys. A pyroclastic cloud is a extremely hot ash cloud raging at high speeds from the crater downwards. Pyroclastic flows were also the reason that so many people were killed during the Merapi volcano eruption some years ago.
Sources are reporting that the ash cloud went 2000 meter above the crater. These clouds in normally not very damaging, the pyroclastic flows down the hills are however extremely dangerous.
The volcano has been active and in status Siaga since October 2012.
Update 13:38 UTC : At the time of writing this update, the bodies of 4 people have been found and 2 are still missing.
Update 14:11 UTC : BNPB (National Disaster Management Agency), East Nusa Tenggara (NTT), has distributed at least 10,000 meals to residents in the Palue, Sikka regency, where people have been evacuated after the eruption of Mount Rokatenda.
BNPB said that meals have now been delivered to the camps. BNPB gave the names of 5 five people were killed fin the village Rokirole, respectively Alosyus Lala (65), Wea Lala (56), Peter Ware (69) and two boys Lenga (5) and Pio (7). Meanwhile, more than 3,000 residents of five villages in the district Palue, Sikka regency, which was in the red zone area around the volcano Rokatenda have been evacuated to Maumere, the capital of the Sikka regency.
Update 14:26 UTC : We have included a video showing the effects of a pyroclastic flow. this is not this eruption of course, but the video describes wel what happens if you get caught by the potentially deadly ash cloud.

Image courtesy and copyright Tribunnews.com

Image courtesy and copyright Tribunnews.com

A NASA satellite image of Rokatenda Meletos or Paluweh volcano as captured on February 12 2013

A NASA satellite image of Rokatenda Meletos or Paluweh volcano as captured on February 12 2013


Rodger Wilson volcano overview of August 9
Seismicity continues to dwindle at Veniaminof volcano (Alaska Peninsula) (station VNWF) with volcanic tremor now grading into discrete volcanic earthquakes.

A slight resurgence in seismicity at Mount Rainier and an area near Mount Saint Helens volcanoes (Cascade arc) (WA) today with two events at the former and five at the latter.

Small earthquakes continue beneath the “South Moat’ of Long Valley Caldera (CA) (station MCM).

A protracted episode of relatively strong harmonic tremor occurred overnight at Popocatepetl volcano (Mexico). Otherwise, the volcano continues to experience periodic expulsions of gas and ash as it has the past several weeks.

Popocatepetl_20130809

A relatively animated Santiaguito Dome Complex (Guatemala) (station STG3) today with two moderate explosions occurring at the volcano since this morning.

Volcanic tremor remains elevated at San Miguel volcano (El Salvador) (station VSM) with a slight increase in occurrence of volcanic earthquakes mix-in with the tremor. Telemetry interference somewhat complicates viewing the record.

San Cristobal volcano (Nicaragua) (station CRIN) continues to “chug” with frequent volcanic earthquakes (the large “red” event is the M5.4 El Salvador earthquake) today. Harmonic tremor continues to vex Concepcion volcano (CONN).

Seismic energy release has increased at Turrialba volcano (Costa Rica) (station VTUC) overnight.

Small earthquakes have increased in number and amplitude at Nevado Del Ruiz volcano (Colombia) (station OLLZ) during the past 24 hours. A volcano-tectonic earthquake swarm has just commenced at Galeras volcano (station CUVZ).

Volcanic seismicity continues to wind-down at Tungurahua volcano (Ecuador) (station RETU). Activity at the volcano is now mostly confined to strong steaming.

Tungurahua_20130809

Volcanic tremor continues its climb (again) at White Island volcano (New Zealand).


 

Rodger Wilson volcano overview of August 8
Volcanic tremor (and wind noise!) are on the decline at Veniaminof volcano (Alaska Peninsula) (station VNWF). Poor weather conditions hamper direct visual observatoin of any continuing eruptive activity at the volcano. Shallow earthquakes are now mixed-in with deeper ones at Mount Spurr volcano (Alaska Range) (station CKT).

A shallow (depth – 4km), magnitude M1.4 earthquake overnight at Mount Rainier is the latest event to occur within a generally northeast-trending corridor of seismicity that stretches from near Mount Saint Helens to “The Mountain”. Both shallow and mid to deep crustal earthquake activity has been elevated in this region for most of the summer.

Another burst of small earthquakes struck the “South Moat” of Long Valley Caldera (CA) overnight. These events were shallower (between 5 km and 6 km depth) than those occurring earlier this summer (around 8 km depth).

Following an episode of harmonic tremor late yesterday, Popocatepetl volcano (Mexico) has remained seismically quiet. CENAPRED personnel flew over the volcano earlier today and witnessed a growing(?) lava dome within the newly (as of Julys explosive activity) “cored-out” crater.

p0808134

Seismic data for the Guatemalan and Colombian volcanoes were not accessible at the time of this writing.

Volcanic earthquakes continue at a high tempo at San Cristobal volcano (Nicaragua) (station CRIN). Volcanic earthquakes (and some low-level harmonic tremor) also affect Concepcion volcano (station CONN).

Background volcanic tremor has increased at San Miguel volcano (El Salvador) (station VSM) during the past 24 hours.

Both volcanic (low-frequency) and volcano-tectonic earthquakes affect Turrialba volcano (Costa Rica) (station VTUC) today.

After markedly diminishing overnight, volcanic earthquakes at Tungurahua volcano (Ecuador) (station RETU) briefly increased in number and magnitude (along with some sustained volcanic tremor) this morning. Glimpses of the volcano through inclement weather indicate mostly strong steaming from the volcano.

Volcanic tremor is on the rise again at White Island volcano (New Zealand). Should we be excited?


Rodger Wilson volcano overview of August 7
No, activity at Veniaminof volcano (Alaska Peninsual) (station VNWF) is not re-invigorating, the seismic “noise” is coming from an early Fall storm transiting the Aleutians and Alaska Peninsula at this time. What I identified as volcanic tremor at Pavlof volcano yesterday was actually wind noise from this storm (one of the pitfalls of monitoring volcanoes in the Northern latitudes!).

Aleutian_Low_Pressure_System_20130807

Small earthquakes continue in the mid crust northwest of Mount Saint Helens volcano (Cascade arc) (WA). A few earthquakes have affected Mount Shasta volcano (Cascades arc) (CA) the past several days. A “slow-slip event” along the subduction zone west of the normally seismically reserved volcano has re-invigorated during the past few days. A burst of earthquake-like signals affected Medicine Lake volcano east of Shasta early this morning (station LAS). Small earthquakes appear on the wane at Long Valley Caldera (CA) (station MRD).

Tiny volcano-tectonic events characterize activity at Popocatepetl volcano (Mexico) today. Externally, the volcano quietly steams. The large event on the Popo seismogram is a regional earthquake.

The Guatemalan volcanoes are relatively quiet today, but the Fuego volcanocam captured a small degassing event at the volcano early this morning.

An episode of harmonic tremor and earthquakes commenced a few hours ago at Concepcion volcano (Nicaragua) (station CONN) following a seismically quiet night at the volcano. Earthquake activity remains elevated at San Cristobal volcano (station CRIN).

Seismicity has become rather feeble at Turrialba volcano (Costa Rica) (station VTUC) this past week. I’m stating this to provoke the volcano into a higher state of activity! It works you know!!

An eruption of gas and ash occurred this morning at Galeras volcano (Colombia) (station CUVZ). The event was more impressive visually than seismically.

Galeras_20130807

Volcanic earthquakes continue to dwindle at Tungurahua volcano (Ecuador) (station RETU). The volcano has remained cloaked in clouds, but eruptive activity is also likely ebbing.

Volcanic tremor at White Island volcano (New Zealand) continues to run a little hot.


 

Rodger Wilson volcano overview of August 6
Low level volcanic tremor and earthquakes continue at Veniaminof volcano (Alaska Peninsula) (station VNWF). Volcanic tremor (eruptive?) and earthquakes reappeared at nearby Pavlof volcano (station PS4) overnight.

Small earthquakes continue at and around Mount Saint Helens and Mount Rainier (Cascade arc) (WA) today.

Small earthquakes remain frequent at Mammoth Mountain volcano and along the southern margin of Long Valley Caldera (CA) (station MRD).

Seismicity has fallen-off within/beneath Popocatepetl volcano (Mexico). The larger event on the Popo seismic record is a regional earthquake.

An explosion this morning at Santiaguito Dome Complex (Guatemala) (Santa Maria volcano) (station STG3) sent a small pyroclastic flow down the Caliente Dome’s flank. Volcanic tremor and small strombolian explosions continue at Pacaya volcano (station PCG).

Santiaguito_20130806

Periods of banded volcanic tremor and earthquakes continue to rattle San Cristobal volcano (Nicaragua) (station CRIN). Pulses of harmonic tremor, volcanic earthquakes and what appear to be tiny volcano-tectonic earthquakes affect Concepcion volcano (station CONN) again today.

Numerous tiny seisms (and an occasional pulses of volcanic tremor) continue at Turrialba volcano (Costa Rica).

Volcano-tectonic earthquakes have reappeared (mixed with pulses of volcanic tremor) in recent days at Nevado Del Ruiz volcano (Colombia) (station OLLZ).

Volcanic earthquakes briefly increased in number and magnitude overnight at Tungurahua volcano (Ecuador) (station RETU), and then settled back into their decreasing tempo of the past few days. A white plume is discernible rising above/through rain clouds in a current volcanocam photo of the volcano.

A fairly steady level of volcanic tremor affects White Island volcano (New Zeland) today. GNS reports an increase of small non-locateable earthquakes beneath Tongariro since the start of this month.


Rodger Wilson volcano overview of August 5
Pulsatory, low-level tremor (grading into discrete volcanic earthquakes) continues at Veniaminof volcano (Alaska Peninsula) (station VNWF) again today. Small deep (low-frequency?) earthquakes occurred in a pulse overnight at Mount Spurr volcano (Alaska Range) (station CKT).

Earthquakes in the middle and deep crust continue around Mount Saint Helens volcano (Cascade arc) (WA). These events may reflect magmatic re-charge within MSH’s deep plumbing system (not an immediate precursor to surface activity).

Mount_Saint_Helens_deep_seismicity_2010308085

Numerous small (Magnitudes mostly less than M1.0) earthquake continue beneath the “South Moat” of Long Valley Caldera (CA) (station MCM).

Seismic energy continues to slowly ramp-up within and beneath Popocatepetl volcano (Mexico).

Popo_20130805

An unstable level of volcanic tremor continues to affect Pacaya volcano (Guatemala) (station PCG). Technical issues have precluded viewing seismic records at the Guatemalan volcanoes the few days. INSIVUMEH appears to have just corrected the problem.

Mostly low-level harmonic tremor and a few volcanic earthquakes tremble within Concepcion volcano (Nicaragua) (station CONN). Seismicity at San Cristobal volcano (station CRIN) remains unstable with periods of banded volcanic tremor and numerous earthquakes continuing there.

Small earthquakes and occasional volcanic tremor remain frequent at Turrialba volcano (Costa Rica) (station VTUC).

Episodes of low-level volcanic tremor and an overnight burst of volcano-tectonic earthquakes are visible on seismograms from Nevado Del Ruiz volcano (Colombia) (station OLLZ) today.

Tungurahua volcano (Ecuador) (station RETU) continues to percolate with numerous volcanic earthquakes today. Brief glimpses of the volcano through rain clouds indicate mostly strong steaming occurring there at this time.

White Island volcano (New Zealand) appears poised to take another run at eruption as volcanic tremor is again increasing there.


Rodger Wilson volcano overview of August 4
Low-level volcanic tremor (and eruptive activity?) continues at Veniaminof volcano (Alaska Peninsula) (station VNWF)

Seismicity and eruptive activity have become more frequent once again at Popocatepetl volcano (Mexico) this past week.

Popocatepetl_20130804

Frequent volcanic tremor has ended for the time being at Turrialba volcano (Costa Rica) (station VTUC).

Low-level pulses of harmonic tremor and volcanic earthquakes continue at Concepcion volcano (Nicaragua) (station CONN) while volcanic earthquakes have dropped-off dramatically at San Cristobal volcano (station CRIN) overnight.

Numerous volcanic earthquakes and low-level volcanic tremor wrack Tungurahua volcano (Ecuador) (station RETU) again today.


Rodger Wilson volcano overview of August 3

Volcanic tremor at Veniaminof volcano (Alaska Peninsula) (station VWMF) continues its slow, steady decline.

Elevated seismicity continues at Mount Rainier (station STAR) and near Mount Saint Helens (station SHW) volcanoes in the Washington Cascades. Event depths at Mount Saint Helens average around 13 km and form a radial pattern in relation to the volcano, nearly opposite the northeast-trending spoke of seismicity which had affected the volcano through most of this summer. Earthquake depths at Rainier are much shallower (averaging 3 to 4 km depth) and likely reflect minor adjustments within the volcano’s hydrothermal system. Small earthquakes also continue to emanate from the hydrothermal system beneath Lassen Peak volcano (CA) (station MEM), as “slow-slip” continues along the subduction zone west of the volcano. Seismicity seems to be easing beneath the “South Moat” of Long Valley caldera (CA).

Mount_Rainier_MSH_seismicity_20130803

Seismicity (in the form of volcanic tremor, small volcano-tectonic events and gas and ash emissions) continues to slowly increase at Popocatepetl volcano (Mexico).

Volcanic tremor remains unstable at Pacaya volcano (Guatemala) (station PCG).

A “loud” episode of harmonic tremor has just ended at Concepcion volcano (station CONN). The number of volcanic earthquakes at San Cristobal volcano (station CRIN) fell-off after an episode of low-level tremor at the volcano last night.

I’m lucky I didn’t comment on the lack of tremor episodes overnight at Turrialba volcano (Costa Rica) (station VTUC) as the volcano just fired-off a relatively strong burst. The Turrialba volcanocam shows a substantial gas plume issuing from the cone today (thogh some of which may be due to meteorological conditions at the summit).

Numerous volcanic earthquakes affect Tungurahua volcano (Ecuador) (station RETU) as the volcano winds-down from eruptive activity earlier in the week.

Boris Behncke Flickr photostream including Stromboli and Etna images - August 3
Watch these great series of volcano pictures

Screen Shot 2013-08-03 at 19.15.38


 

As this page grew too long, we have now Archived the July 8 until July 31 updates, 2013. Archive links can always be found at the bottom of this page.


Rodger Wilson volcano overview of August 2
Volcanic tremor continues to dwindle at Veniaminof volcano (Alaska Peninsula) (station VNMF), now grading into discrete volcanic low-frequency earthquakes.

The American West is a little rambuncious today with earthquakes at Mount Rainier (Cascade arc) (WA) (station STAR), a magnitude M2.9 event at Mount Shasta (CA) (station LGB) and a cluster of small events at Lassen Peak (CA) (station LEL). The Rainier earthquakes are occurring beneath a portion of the mountain that produced unusually large rockfalls several summers ago. Remember when Shasta last had earthquakes? There was a “slow-slip event occurring immediately west of the cone. Well, guess what? There is another is underway there at this time. Numerous small earthquakes continue to rattle the southern boundary of Long Valley Caldera as well (station MCM). See also the attached video of the eruption of Steamboat Geyser (Yellowstone Caldera).

Mount_Rainier_seismicity_20130802

Mount_Shasta_earthquake_20130802

Lassen_Peak_earthquakes_20130802

Pacaya volcano (Guatemala) (station PCG) appears to be in a 12 to 24-hour cycle of eruptions/heightened seismicity at this time.

Just as I spoke about the decline in volcanic tremor at Turrialba volcano (Costa Rica) (station VTUC) yesterday, the volcano responded with relatively strong multiple bursts of tremor overnight. Volcanoes are like that!

Elevated numbers and magnitude of volcanic earthquakes have affected San Cristobal volcano (Nicaragua) (station CRIN) for the past week and relatively strong episodes of harmonic tremor (and occasional volcanic earthquakes) continue at Concepcion volcano (station CONN).

Tungurahua volcano (Ecuador) (station appears to be following Veniaminof volcano’s lead and simmering into numerous small volcanic earthquakes as activity winds down at the volcano.


 

Update on the August 1 report
Just wanted to pass-on that harmonic tremor and larger volcanic earthquakes have further increased at Concepcion volcano (nicaragua) (station CONN) during the past 24 hours (I couldn’t access this data earlier today!).

Rodger Wilson volcano overview of August 1
Volcanic tremor (and likely eruptive activity) has further dwindled overnight at Veniaminof volcano (Alaska Peninsula) (station VNWF).

Veniaminof_2013b

Numerous earthquake-like signals dot seismograms from Newberry volcano (Cascade arc) (OR) (station CPCO) today. I’m not sure whether they are real or man-made (due to geothermal/geophysical exploration) at this time. An earthquake was recorded (located) at the volcano early yesterday.

Numerous small earthquakes (magnitudes mostly < M1.0) continue beneath the “South Moat” of Long Valley Caldera (CA) (station MCM) today.

Small volcano-tectonic earthquakes and low-level volcanic tremor have increased slightly at Popocatepetl volcano (Mexico) the past few days. A volcanocam photo taken about an hour ago captured a moderate gas and ash emission from the volcano.

Guatemalan volcanoes Fuego and Santa Maria continue to exhibit low-level activity at the surface, but strombolian explosions at nearby Pacaya volcano (station PCG) have strengthened again this morning.

Seismicity remains elevated at Turrialba volcano (Costa Rica) (station VTUC), but volcanic tremor has mostly disappeared from records there.

Low level eruptive activity continues at Tungurahua volcano (Ecuador) (station RETU) today, but appears to be on a diminishing trend.

The activity of Ambrym volcano has slightly increased to a minor eruptive phase. Its Volcanic Alert Level is yet at Level 1 but could change in the coming days or weeks. Areas near the crater are at high risk and should not be approached. Volcano seismic data recorded from 26th July 2013 between 1200 to 2000 UT (24:00 to 07:00 VUT) show a swarm of volcanic events.

Recent OMI satellite data depict modest-sized SO2 plumes drifting from Tolbachik (Kamchatka Peninsula), Tungurahua, Ambrym (Vanuatu), and Etna (Sicily) volcanoes.


OLDER ARCHIVED PARTS OF THIS REPORT :
2013 : July 8 – July 31
2013 : June 24 – July 7
2013 : June 8 – June 23
2013 : May 26 – June 7
2013 : June 8 – August 20

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