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Wordwide volcano activity – Archive June 8 until June 23, 2013

This is an archived part of our Daily Volcano Activity report.
Click here to read the latest part of our report


This report was compiled out of many information sources by Armand Vervaeck, Rodger Wilson, Georges Vitton and Jens Skapski
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Long Valley Caldera seismicity, California - (Rodger Wilson June 23 - 18:36 UTC)
Another burst of seismicity occurred early today within the South Moat of Long Valley Caldera (CA). The events were again mainly located between 6 and 8 km depth with maximum magnitudes just within "felt" range at M2.7

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Machin volcano update, Colombia - (Rodger Wilson - June 22 - 15:01 UTC)
An earthquake swarm that began around 6 am Local time is now winding-down at Machin volcano (Colombia). None of the over 150 events has been reported "felt". The largest event so far has been a magnitude M1.8 earthquake. All the events cluster between 4 and 6 km depth beneath the volcano.

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Mount Gharat, Vanuatu observed from space - (JS - June 22 - 14:03 UTC)
Just 20 kilometers (12 miles) in diameter, Gaua Island is actually the exposed upper cone and summit of a stratovolcano that is 3,000 meters (10,000 feet) high and 40 kilometers (25 miles) in diameter. Most of the volcano is submerged beneath the Pacific Ocean. Also known as Santa Maria Island, Gaua is part of the Vanuatu Archipelago, a group of volcanic islands in the South Pacific Ocean governed by the Republic of Vanuatu.
According to the Smithsonian Institution Global Volcanism Program, the most recent report of eruption activity at Gaua was a steam plume observed on April 29, 2013. This photograph records subsequent steam emissions observed on May 31, 2013, by an astronaut on the International Space Station. The steam plume extends east-southeast from its likely source at Mount Gharat (also spelled Garat or Garet), a historically active cinder cone located along the southwest flank of a 6 by 9 kilometer (4 by 6 mile) collapsed summit caldera. Gaua is one of several volcanoes monitored by the Vanuatu Geohazards Observatory.
The dark blue-green waters of Lake Letas, formed within the caldera, are visible at image center. The majority of Santa Maria Island is covered in green vegetation, with areas directly west and south of Mount Gharat covered with grey ash deposits. Patchy cloud cover is visible to the west and south, but is easily distinguished from the steam plume by its linear nature and brighter tone.

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Ambrym volcano, Vanuatu - (GV - June 22 14:14 UTC)
Current Vanuatu Volcano Alert Level: Level 1
Ambrym volcano has been emitting minor ash from its eruptive vents and has been degasing substantially in the last 7 days. The Volcanic Alert Level of this volcano is yet at Level 1 but could change in the coming days. The area of high risk is near the craters.
With this situation, villages and communities of Ambrym island, especially those in the prevailing trade winds direction will expect ash falls and acid rain that may cause foliage fumigation hence damage garden crops. Satellite images of 02nd, 04th, 11th, 14th and 16th June showed important degasing from the volcano that could cause damage to the environment and contaminate water in the communities or villages.
Thus approaching the volcano could be dangerous or not safe; it would be safer to view the volcano far from the craters to avoid any volcano related incidents. Therefore it is recommended that all communities, villages, visitors and travel agents seriously consider this information.
The Department of Meteorology and Geohazards is monitoring closely the volcanic activity of this volcano. The next information on the status of the volcano’s activity will be issued when more information is available.
"However, this report is actually quite alarming in the "standard" of Ambrym and Marum. Sur the Ambrym, weather of recent days conditions with a lot of rain, have confined the gas inside the crater, which did not prevent the experience "Ambrym in 2013" to reach the edge of the lava lake.
For Marum, we noted last year, the opening of another mouth on the shelf to the right of the lake. The mouth has widened, with hot ash emitted, which are partly responsible for the presence of ash. Finally, the "adventitious" crater NiriTaten widens every day, and is very dangerous because of its sudden and unpredictable explosions". Source Geohazards

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SO2 satellite image from yesterday

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Popocatepetl volcano update - (GV - June 22 - 14:29 UTC)
During the last 24 hours, Popocateptl has registered 35 small explosions. Because of bad weather it could not be observed whether the steal contained a lot of ash and gas. During the early hours of the today, 2 weak volcano tectonic earthquakes were recorded.

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Image courtesy and copyright Mauricio Ferro Evans

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Image courtesy and copyright Mauricio Ferro Evans


Recent earthquake activity at Mount Shasta volcano, California - (Rodger Wilson - June 21 - 16:06 UTC)

An average of about one earthquake a day has occurred at the volcano since 11 June. This is somewhat unusual for the volcano since it typically displays a relatively low rate of earthquake occurrence. I believe the recent uptick in seismicity at Mount Shasta, the Greenville earthquake sequence, several deep (30-40 km depth) events beneath the Klamath Mountains to the west, as well as recent small earthquakes at Lassen Peak can be related to a just ended Slow-Slip Event along the subducted slab beneath the region. The SSE nucleated southwest of Lassen Peak on May 11th and rapidly migrated east and then northwest (to immediately west of Shasta) through 13 June. Slow-slip occurs when the overlying crustal plate periodically (and only partially) detaches from the underlying (subducting) oceanic plate and slowly slips (millimeters/day) westward (contrary to its normal eastward movement) over a period of days to weeks. The events occur about every 14 months beneath Washington and British Columbia, about every two years beneath Oregon (one just occurred there earlier this year!), and yearly beneath Northern California.
While interesting, the earthquake activity at Mount Shasta does not portend anything exciting. It is likely the volcano is simply "re-adjusting" to relatively the rapid crustal movement which has occurred in the region this past month. I have observed this volcano-tectonic relationship before further to the north (at Mount Saint Helens and Mount Rainier) during the 2009 SSE there (it was the subject of my Master's thesis). During that time, sympathetic swarm activity occurred at both volcanoes!
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Renventador volcano eruption update, Ecuador - (Rodger Wilson - June 21 - 16:06 UTC)
A rare view of Reventador volcano (Ecuador) in eruption today, along with the volcano's current seismogram.
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Sangeang Api volcano, Indonesia - (GV - June 20 - 13:50 UTC)
CVGHM reported that during May through 13 June white plumes rose 10 m above Sangeang Api's crater. Both the lava dome and surrounding areas showed no changes since November 2012. The Alert Level had been increased to 3 (on a scale of 1 to 4) on 19 May due to a trend of increasing seismicity. As many as 77 shallow earthquakes and 66 deep earthquakes had been detected daily.
Residents and tourists were advised to at least stay away 5 km from the crater. Since then seismicity decreased; 15 shallow earthquakes and 3 deep earthquakes were recorded on 13 June. The Alert Level was lowered to 2 again on June 14. The public is advised not to approach the crater within a radius of 1.5 km.

Archive image Tom Casadevall, 1985 (U.S. Geological Survey)

Archive image Tom Casadevall, 1985 (U.S. Geological Survey)

Veniaminof volcano update, Alaska - (GV - June 20 - 13:50 UTC)
The eruption of Veniaminof volcano continues. Recent satellite images show very high elevated surface temperatures at the cinder cone inside the caldera consistent with continued effusion of lava. No plumes have been observed in satellite images however, small ash bursts rising to less than 15,000 ASL were seen in web camera images intermittently throughout yesterday. Volcanic tremor continues unchanged in the past 24 hours.
Recent eruptions of Veniaminof volcano have all occurred from vents located on the cinder cone inside the caldera and were characterized by brief bursts of ash emission and small explosions with ash fall limited to areas on the flanks of the volcano. While a larger ash emission is not expected, it is possible and should be detected on the current seismic network. The current lava flow is expected to remain within the confines of the caldera. There is a possibility that activity at the volcano could increase with little to no warning.

The volcano as captured from Port Heiden, Alaska - Image courtesy and copyright Katherine Peck

The volcano as captured from Port Heiden, Alaska on June 18 - Image courtesy and copyright Katherine Peck

Modis Hot Spot image from June 19

Modis Hot Spot image from June 19

 

Pavlov volcano update, Alaska - (GV - June 20 - 13:50 UTC)
The eruption at Pavlov volcano is ongoing. Seismic tremor continues. Elevated surface temperatures consistent with lava effusion were detected in satellite images. A small ash plume from the summit vent is also seen in satellite data. Web camera images yesterday showed small, low level ash puffs emitting from the volcano. Current web camera images show mostly cloudy conditions.
Previous eruptions of Pavlof Volcano have lasted for weeks, months or years and often exhibit fluctuating levels of activity and it is not uncommon for the volcano to enter short periods of repose followed by vigorous ash emissions, lava fountaining, and lahar generation. Occasionally past eruptions have generated vigorous ash emissions and clouds that reached 30,000-50,000 ft. above sea level. We expect this eruption to proceed in a manner similar to previous eruptions.
Eruptive activity at Pavlof could increase with little to no warning.

Pavlov volcano and his sister (right) Image courtesy and copyright Paul Logan

Pavlov volcano and his sister (right) on June 10 - Image courtesy and copyright Paul Logan


A little too busy with earthquakes today in Russia, Alaska and the Philippines.

Yasur volcano, Vanuatu - (GV - June 19 17:01 UTC)
After Geohazard has raised the alert level to 2 on May 29, activity remained intense but relatively stable. From time to time, a few volcanic bombs get ejected on the outer slopes of the active cone.
On June 17 the volcano began to show increased activity with a dense plume of ash, this during several hours.
These webcam images below are showing the activity at different times.

Image courtesy Geohazards Vanuatu

Image courtesy Geohazards Vanuatu

Image courtesy Geohazards Vanuatu

Image courtesy Geohazards Vanuatu

 


 

Long Valley Caldera earthquake swarm update - (Rodger Wilson June 18 - 15:20 UTC)
The earthquake swarm at Long Valley caldera (CA) appears to have ended, but included (felt) events to magnitude M3.0. Swarm events also shallowed slightly with time from around 8 km depth to about 6 km depth. The main residual magma chamber is located at 8 km depth although shallower magma apophyses are believed to occur beneath the "South Moat" where the swarm took place. This is one of the more vigorous earthquake sequences to occur within the caldera for some time. This is intriguing since inflation at the volcano ended last fall.

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Long Valley Caldera Earthquake Swarm‏ - (Rodger Wilson June 18 - 06:47 UTC)
A vigorous earthquake swarm is underway (beginning the past few hours) beneath the "South Moat" of Long Valley Caldera. Most of the earthquakes show focal depths of around 8 km which is the depth of the residual magma chamber within the caldera. Some of the events have been felt.

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Popocatepetl volcano update, Mexico - (AV June 17 - 20:47 UTC)
A nice video from an explosion earlier today in the popocateptl volcano.


 

Merapi volcano, Java, Indonesia nightly action - (AV - June 15 - 13:27 UTC)
We enjoyed looking some time at the minor intra-crater explosions of this dangerous volcano. Nothing unusual at the moment (see also update below), but great to follow at the every 8 second renewed image at clear weather like at the time of writing this update.
Click here for the Badan geologi webcam (image will refresh every 8 seconds, great to make a time-lapse movie)

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Veniaminof volcano update, Alaska - First good image of the ash cloud - (AV - June 14 - 21:04 UTC)
AVO (Alaska Volcano Observatory) has released the first image showing evidence of the eruption of the Veniaminof volcano. The cloud contains clearly some ash. The image was taken from a distance of 75 km, which explains in part the quality of it.
The last report from AVO (12:55 on June 13, local time) mentions that : An eruption at the intracaldera cone is likely underway today as determined from satellite observation of elevated surface temperatures this morning at 13:25 UTC (05:25 AKDT), prompting AVO to raise the Aviation Color Code and Volcano Alert Level to ORANGE/WATCH. Seismic tremor continues and is indicative of low-level effusive activity and small explosions. No ash plumes have been observed this morning although clouds have obscured web camera views of the summit. Any low-level plume produced would drift to the northwest based on predicted wind trajectories.
AVO has been monitoring Veniaminof closely since elevated levels of seismicity became persistent on June 8. Steam plumes issuing from the intracaldera cone have been observed in web camera views since then, but so far no ash emissions have been confirmed.
Recent eruptions of Veniaminof Volcano have all occurred from vents located on the intracaldera cone and were characterized by brief bursts of ash emission and small explosions. Ash plumes associated with this type of activity are typically diffuse and generally do not reach more than 20,000 feet above sea level. Ash fallout is typically limited to the flanks of the volcano. Minor emissions of steam and ash may persist for for weeks to months. The last episode of more energetic activity occurred in 1993-94 when an ash plume rose to about 18,000 feet above sea level and small lava flows poured onto glacier ice around the intracaldera cone. An eruption in 1983-84 produced an ash plume that reached about 25,000 feet above sea level.
With regards to Culture Volcan for telling us
VAAC Anchorage (Volcanic Ash Advisory) has published the following report :
VAAC: ANCHORAGE
VOLCANO: VENIAMINOF 0000-00
AREA: ALASKA PENINSULA
ADVISORY NR: 2013/003
INFO SOURCE: GOES/AVO/PILOT REPORT
AVIATION COLOR CODE: ORANGE
ERUPTION DETAILS: LOW-LEVEL ERUPTION CONTINUE
OBS VA DTG: 14/2020Z
OBS VA CLD: SFC/FL140 N5631 W16009 - N5634 W16023 - N5634 W15918
- N5556 W15933 - N5552 W16036 - N5631 W16009 MOV STNR. = eventual ash up to 14000 feet (FL140)
FCST VA CLD +6HR: 15/0220Z SFC/FL140 N5647 W16030 - N5647 W15914
- N5607 W15932 - N5605 W16033 - N5647 W16030.
FCST VA CLD +12HR: 15/0820Z SFC/FL140 N5651 W16026 - N5656
W15911 - N5606 W15928 - N5603 W16030 - N5651 W16026.
FCST VA CLD +18HR: 15/1420Z SFC/FL140 N5704 W16024 - N5703
W15904 - N5611 W15934 - N5607 W16013 - N5704 W16024.
RMK: SIESMIC ACTIVITY INDICATES CONTINUED LOW-LEVEL EMISSIONS.
NXT ADVISORY: WILL BE ISSUED BY 20130615/0220Z

Image Courtesy Bob Murphy

Image Courtesy Bob Murphy

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Possible ash trajectories until midnight UTC - image courtesy AVO

Merapi volcano, Yogyakarta, Indonesia is blowing ash again ! - (AV - June 14 - 07:35 UTC)
It rains ash again on the slopes of the well know Mount Merapi volcano near Yogyakarta, Indonesia. The ash layer is visible in a number of villages 3 districts of Magelang regency (Srumbung, Shamans, and Muntilan)
A small explosion
occurred at 9:15 pm Thursday. Villagers were immediately alerted by the explosion and ash cloud.
Despite this activity Merapi status is still called "normal" . The regional Disaster Emergency Management Agency (BPBD)
said thar "Residents do not have to panic and worry. Small explosions and ash emissions are a normal pattern for Merapi volcano. The ash layer can also be seen on the plants who are growing on the western slopes of the volcano. All the parameters of the volcano are still being normal, so no change is being expected in the status of the volcano at this time. Compiled from various local sources.

If you do not believe us, you can always look for yourself at the volcano webcam here 🙂 - You will have to check for yourself as our webcam image does not show the steam from he crater (which we saw earlier today). You maybe more lucky.

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Merapi in the clouds at the time of writing this update


 

Alert increase at Veniaminof volcano update, Alaska - (AV - June 13 - 18:35 UTC)
AVO Alaska reported a little while ago : Elevated surface temperatures observed in satellite images of Veniaminof Volcano this morning at 13:25 UTC (05:25 AKDT) indicate an eruption at the intracaldera cone is likely underway. AVO is thus raising the Aviation Color Code and Volcano Alert Level to ORANGE/WATCH. Seismic tremor continues and is indicative of low-level effusive activity and small explosions. No ash plumes have been observed this morning although clouds have obscured web camera views of the summit.
AVO has been monitoring Veniaminof closely since elevated levels of seismicity became persistent on June 8. Steam plumes issuing from the intracaldera cone have been observed in web camera views since then, but so far no ash emissions have been confirmed.
Recent eruptions of Veniaminof Volcano have all occurred from vents located on the intracaldera cone and were characterized by brief bursts of ash emission and small explosions. Ash plumes associated with this type of activity are typically diffuse and generally do not reach more than 20,000 feet above sea level. Ash fallout is typically limited to the flanks of the volcano. Minor emissions of steam and ash may persist for for weeks to months. The last episode of more energetic activity occurred in 1993-94 when an ash plume rose to about 18,000 feet above sea level and small lava flows poured onto glacier ice around the intracaldera cone. An eruption in 1983-84 produced an ash plume that reached about 25,000 feet above sea level.
ER : cloudy skies are obscuring the (distant) view on the volcano.

Veniaminof volcano update, Alaska - (AV - June 13 - 15:48 UTC)
The volcano still shows some activity as it can be seen on the FAA webcam image below. A strong, what resembles a mainly steam plume can be seen at the right side of the mast.

courtesy FAA aviation webcam system

courtesy FAA aviation webcam system

Seismogram nearest to the volcano - calm periods are alternating with more tremor

Seismogram nearest to the volcano - calm periods are alternating with more tremor

 

Sakurajima volcano video, Japan (AV - June 13 10:25 UTC)
A long time lapse video of Sakura-jima explosion earlier today.


Popocatepetl volcano update, Mexico
(GV - June 13 08:41 UTC)
Cenapred June 11, 1600 GMT : In the last 24 hours, the monitoring system of Popocatepetl recorded 38 low-intensity exhalations accompanied by emissions of steam, gas, and it is likely that some of them were also accompanied by small amounts of ash but this could not be confirmed, because of the presence of clouds in the area, which hampered visibility. Yesterday, the largest held at 13:02 and 3:10 p.m., 5:22 p.m., 6:43 p.m. ET 11:08 p.m. pm and this morning at 4:04 am. In addition, 7 volcano-tectonic earth tremors are detected at 17:06, 5:32 p.m., 5:42 p.m., 5:59 p.m., 6:05 p.m., 8:38 p.m. ET 20:54 h yesterday, all Mc <2.5. For most of the period covered by this report, the terms of clouds hampered visibility. However, this morning, it was observed a thick column of steam rising about 1 km above the crater before being diverted to the north by the prevailing winds.
The yellow volcanic alert vigilance is in Phase 2 which explains the following precautions :
1. Continue to monitor the safety radius of 12 km, presence in this area is not allowed.
2. Some traffic rerouting applies.
3. Popocatepetl volcano monitoring is performed continuously 24 hours/24. Any change in the activity will be reported in due course.

Image courtesy Cenapred, Mexico

Image courtesy Cenapred, Mexico

Children living near Tungurahua volcano (Ecuador) show their paintings (GV - June 13 08:51 UTC)
Rest assured, Tungurahua has not regained activity. Seismic action is low. in June 2013, the observatory recorded 15 LP events and one volcano-tectonic (VT). No observations were made of the surface activity, due to the persistence of clouds in the crater area. The only risk at the moment are the risks of lahars in the event of heavy rains.
But I merely come up with this report to catch your attention for an exposition of Children's paintings of Tungurahua. The children are all living in the direct vicinity of the volcano.
"VOLCANO EL ES MI VECINO"
The exposition takes place in the Baños town hall.


Taal volcano, Batangas, Philippines - (AV - June 12 - 22:30 UTC)
Taal Volcano in Batangas province showed heightened activity after at least nine volcanic quakes were recorded around it in the past 24 hours, according to the Philippine Institute of Volcanology and Seismology (Phivolcs). Paulo Reniva, science research assistant of the Phivolcs’ Volcano Monitoring Division, said these quakes were monitored from 7 a.m. Tuesday to 7 a.m. yesterday. Phivolcs recorded seven volcanic quakes in a previous 24-hour observation period.
Despite the increased activity, Reniva said “there is nothing to worry about” since tremors below 10 are still within the “normal parameters” of a volcano under Alert Level 1.
Alert Level 1, which means that hazardous eruption is not imminent, remains in effect over Taal.
However, Reniva reminded the public to stay away from the main crater due to sudden occurrence of steam explosions and accumulation of toxic gases. Taal has about 40 craters, above water and under water, which have so far been discovered.
Read the full article here

Taal volcano crater lake, Philippines - Image courtesy and copyright Filipino Travel center

Taal volcano crater lake, Philippines - Image courtesy and copyright Filipino Travel center

Pavlov volcano, Alaska update - (AV - June 12 - 21:00 UTC)
in the afternoon of June 11 AVO reported : Ash emissions from Pavlof continue. Seismic tremor and explosion signals accompany the activity. Intermittent elevated surface temperatures consistent with lava effusion were observed over the past day in satellite images. Satellite images and pilot reports from the last 24 hours indicate minor ash plumes consistent with low-level (less than 20,000 ft asl) winds. Web camera images were cloudy.
The image below has been captured by Paul Logan on June 10 (courtesy and copyright)

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Most important activity of Smithsonian/USGS Weekly Volcanic Activity Report (AV - June 12 - 21:46)
New Activity/Unrest: | Cerro Negro, Nicaragua | Chirinkotan, Kuril Islands | Copahue, Central Chile-Argentina border | Ibu, Halmahera | Kelimutu, Lesser Sunda Islands (Indonesia) | Mayon, Luzon | Pavlof, Alaska Peninsula | San Cristóbal, Nicaragua | Veniaminof, Alaska Peninsula
Some events were already treated on this page when they happened, but we give them as a reminder anyway.

CERRO NEGRO Nicaragua 12.506°N, 86.702°W; summit elev. 726 m
INETER reported that the seismic station at the base of Cerro Negro recorded the onset of tremor at 0845 on 4 June. Seismicity fluctuated; Real-time Seismic Amplitude Measurement (RSAM) values increased to 60 units, from an average value of 14. From 1535 to 1731 the network recorded 49 earthquakes that were too small to be located.

CHIRINKOTAN Kuril Islands 48.980°N, 153.480°E; summit elev. 724 m
SVERT reported that steam and gas activity at Chirinkotan was observed in satellite imagery on 5, 7, and 9 June.

COPAHUE Central Chile-Argentina border 37.85°S, 71.17°W; summit elev. 2997 m
OVDAS-SERNAGEOMIN reported that during 4-11 June white plumes recorded by a web camera rose at most 200 m above Copahue and drifted N and E. During 4-5 June seismicity had decreased with respect to the previous 24-hour period; the majority of the signals were low-magnitude hybrid events, detected at an average rate of 42 per hour. During 5-6 June seismicity was similar to the previous period, with an average of 50 events per hour being detected. Seismicity increased during 6-7 June; an average of 84 events per hour was detected. During 7-8 June seismicity fluctuated with a high average of 124 events per hour then decreased to a low average of 8 events per hour; the overall average was 62 events per hour. Seismicity decreased during 8-9 June; only 5 events per hour were detected. On 9 June OVDAS-SERNAGEOMIN scientists aboard an overflight to locate sites for the installation of three additional seismic stations observed fumaroles inside Del Agrio Crater, and gas emissions that rose at most 200 m and drifted NE. They noted that no lava dome was present. During 9-10 June the number of earthquakes increased to an average of 20 events per hour. The Alert Level remained at Orange.

IBU Halmahera 1.488°N, 127.63°E; summit elev. 1325 m
CVGHM reported that during May through 6 June white-to-gray plumes rose 200-450 m above Ibu's crater rim. Seismicity increased and volcanic tremor was detected. The lava dome contained to grow, especially the N part, and in early June had grown taller than the N crater rim. Based on visual and instrumental observations, as well as the hazard potential, CVGHM increased the Alert Level to 3 (on a scale of 1-4) on 7 June. The public was warned to stay at least 3 km away from the active crater.

KELIMUTU Lesser Sunda Islands 8.77°S, 121.82°E; summit elev. 1639 m
CVGHM reported that on 3 June the water in Kelimutu’s Crater II (Tiwu Nua Muri Kooh Tai Crater) turned from blue to a light brown color, “smoke” rose 50 m above the crater, “rustling water sounds” were heard near the wall of Crater I (Tiwu Ata Polo), and a sharp sulfur odor was noted. That evening a weak sulfur odor was reported in Pemo (3 km). Plants within 2 km S and SE appeared to have wilted.
Based on seismicity from 20 May-2 June and visual observations on 3 June, CVGHM raised the Alert Level to 2 (on a scale of 1-4), and warned the public not to approach the craters within a radius of 2 km and to avoid river valleys.

MAYON Luzon 13.257°N, 123.685°E; summit elev. 2462 m
PHIVOLCS reported that during 5-10 June white to off-white steam plumes that drifted WSW, NW, WNW, NNE, and NE, and occasional bluish fumes, were observed at Mayon. Incandescence emanated from the crater during most evenings into early mornings; cloud cover prevented crater observations during 7-8 and 10-11 June. During 5-6 and 9-10 June the seismic network recorded one volcanic earthquake each period, and during 6-7 June one rockfall signal was detected. The Alert Level remained at 1; PHIVOLCS reminded the public not to enter the 6-km-radius Permanent Danger Zone (PDZ).

PAVLOF Alaska Peninsula 55.42°N, 161.887°W; summit elev. 2519 m
AVO reported that ash emissions from Pavlof that began on 4 June continued during 5-11 June, and were accompanied by seismic tremor and explosion signals. Overnight during 4-8 June satellite images detected elevated surface temperatures near the vent consistent with lava effusion and fountaining. On 5 and 6 June an ash plume observed in images drifted 40-45 km W and SW, at altitudes of 4.3-5.5 km (14,000-18,000 ft) a.s.l., based on pilot estimates. During 8-10 June images showed an ash plume drifting 20-53 km SE. The Volcanic Alert Level remained at Watch and the Aviation Color Code remained at Orange.

SAN CRISTOBAL Nicaragua 12.702°N, 87.004°W; summit elev. 1745 m
INETER reported that on 7 June seven explosions at San Cristóbal ejected gas and ash, and were detected by the seismic station located on the W flank. The explosions occurred at 0615, 0645, 0653, 0911, 1137, 1139, and 1143, and were also observed by civil defense and INETER staff. The largest explosion, at 1139, generated a plume that rose 100 m. Sulfur dioxide emissions, which had been low, increased. A report later that afternoon stated that gas-and-ash explosions decreased, but Real-time Seismic-Amplitude Measurement (RSAM) values almost tripled to between 80 and 100 units due to increased tremor. INETER noted that tremor is frequently detected at San Cristóbal, and for the public not to be alarmed. A small lahar occurred at 1710.

VENIAMINOF Alaska Peninsula 56.17°N, 159.38°W; summit elev. 2507 m
On 8 June AVO reported that gradually increasing seismic tremor at Veniaminof had been detected during the previous two days. The Aviation Color Code was raised to Yellow and the Volcano Alert Level was raised to Advisory. Clear web-camera and satellite views showed nothing unusual at the volcano. During 8-10 June seismicity continued to increase and a persistent steam plume rose from the central cone within the caldera.


 

Pavlov volcano, Alaska - (AV - June 11 - 16:18 UTC)
AVO Alaska reported on June 10 that : Ash emissions from Pavlof continue. Seismic tremor and explosion signals accompany the activity. Persistent elevated surface temperatures consistent with lava effusion were observed over the past day in satellite images. Satellite images from the last day show an ash plume extending 33 miles (53 km) southeast of the volcano. This direction is consistent with low-level (less than 20,000 ft asl) winds. Web camera images were cloudy.
Due to the bad weather, we can't see anything on the FAA Cold Bay webcam right now

Veniaminof volcano update - (AV - June 11 - 15:48 UTC)
It looks like the volcano has stopped his activity at the moment. The webcam shows a clear sky and no longer a steam / ash cloud. The alert level is still the same and the seismogram does not show a lot of changes neither. We will follow up this activity on a regular basis.

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Webcam Image courtesy FAA America

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Image courtesy AVO Alaska

Paluweh volcano, Indonesia - (GV - June 11 - 08:59 UTC)
Small seismic crisis Paluweh on June 10, 2013, but not much other activity. Earthquakes going on for about 1-2 hours. Small rockfalls on the southern flank.
The Paluweh, also known as the Rokatenda forms the island Paluweh (8 km wide) north of the volcanic arc that crosses the island of Flores. Although the volcano is about 3000 m above the seabed, its peak only 875 m. The vast area of ​​the irregular summit contains overlapping craters up to 900 m wide and several lava domes.
Several flank vents are located along a NW crack. The largest historical eruption of Paluweh occurred in 1928, when a strong explosive eruption was accompanied by landslide-induced tsunamis and the forming of a lava dome.
The news of this activity has been confirmed by the hotspot as detected by the satellite yesterday.

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Veniaminof volcano update - (AV - June 11 - 07:39 UTC)
The latest newsletter of the Alaska Volcano Observatory, posted a few minutes ago, continues to indicate only degassing and maintains the aviation alert level to yellow at the moment. Cultur Volcan contacted the Alaska Volcano Observatory to ask if what could be seen on the images could only be some lights effects (the gas plume, sometimes dense, may appear darker). they however confirmed them that there was indeed a plume of ash, but in very small quantities, which do not pose a problem for aviation. (text translated from : http://laculturevolcan.blogspot.fr/)
below a nice clear image of the FAA Perryville webcam showing a quite big plume considering the distance from the webcam to the volcano.

FAA Perryville webcam image at the time of writing this update

FAA Perryville webcam image at the time of writing this update


 

Nyiragongo volcano, Democratic Republic of Congo (Rodger Wilson - June 11 - 22:08 UTC)
An impressive SO2 plume from Nyiragongo volcano (DRC) today. While these plumes do not always occur in-conjunction with actual eruptions, they do indicate a large input of fluids (including magma) into the volcano's shallow magmatic system.
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Sabancaya volcano, Peru - (Rodger Wilson - June 11 - 22:08 UTC)
VT earthquakes have recently increased at Sabancaya volcano (Peru), also indicating renewed magmatic intrusion at that volcano.
The SEISMICITY continues to occur outside the volcanic edifice within 15 km of the crater. It is a fairly common tectonic behavior observed in numerous volcanoes at the beginning of reactivation phase.
The MAGNITUDE of these earthquakes are in the range of -1 to 3 ML, and its depths are between 2-15 Km
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Shiveluch volcano, Kamchatka, Russia (GV - June 10 19:09 UTC)
Russia's northernmost active volcano is churning out ash to a height of up to 9,000 meters (29,500 feet) in the country's Far East, local scientists reported on Monday. The 3,283-meter (10,771-foot) Shiveluch volcano increased activity in May 2009 and has been periodically spewing ash from three to ten kilometers. “Video monitoring of the volcano was complicated due to poor weather conditions, but seismological stations registered over the past 24 hours almost 150 local seismic activities with the most continued one accompanied by a spew of ash up to a height of 6.9 kilometers, give or take 2.2 kilometers,” a local department of the Geophysical Service with the Russian Academy of Sciences said in a statement.
Although the current eruption poses no immediate threat to nearby settlements, the ensuing ash fallouts could be hazardous to health and the environment.
The clouds of volcanic ash could also pose threat to air traffic because the tiny particles cause problems with aircraft engine turbines.
Update June 9 : According to seismic data by KBGS RAS, at 21:02 UTC on June 09, possible ash plume rose up to 7-8 km a.s.l. There is not visual data because the volcano obscured by density clouds.

Veniaminof volcano, Alaska update - (GV - June 10 10:39 UTC)
At daylight the activity cloud can well be seen on the FAA webcam at Perryville. The image below dates from 05:22 Local time (=13:22 UTC).

FAA image

FAA image

Veniaminof volcano, Alaska alert increase - (GV - June 10 10:39 UTC)
Over the past two days, AVO has detected gradually increasing seismic tremor beneath Veniaminof. They therefore raised the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. Clear web-camera and satellite views currently show nothing unusual at the volcano. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005.
Yesterday seismic tremor continues at Veniaminof. Clear web camera views showed a steam plume over the past 24 hours, though it is difficult to see in daytime views. AVO has received no other reports of activity.
Update at the time of writing : Activity continues like we can see on the webcam images below. A smoke plume (steam and/or ash is difficult to see) is visible on these webcam picture (Perryville NW).
The seismogram shows a serious earthquake a little after 8 UTC. This is a far out in the sea earthquake which has nothing to do with the volcano. This was the earthquake which is viewable on the seismogram.

Some history : The volcano was the site of a colossal (VEI 6) eruption around 1750 BC. This eruption left a large caldera. In modern times the volcano has had numerous small eruptions (over ten of them since 1930); these are located at a cinder cone in the middle of the caldera.
Veniaminof has one of the highest elevations of Alaskan volcanoes. Partly for this reason, it is covered by a glacier that fills most of the caldera. Because of the glacier and the caldera walls, there is the possibility of a major flood from a future glacier run.

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The volcano during another activity period in 1984

The volcano during another activity period in 1984


Clouds on top of Haleakala, Mauii, Hawaii (AV-June 9)
No action here, it is only a dormant volcano, but a very big one.
Photographer Dan Douglas has TimeLapsed the clouds whirling around the volcano and has compiled it with some great music. He called the video "The House of the Sun".
Enjoy this outstanding TimeLapse video in high quality.


Spotlight on : Erebus volcano, Antarctica
(GV - June 9)
Discovered in 1841 by James Ross and his crew
First ascent: 1908 (crater), by members of the expedition of Ernest Shackleton
Location: Ross Island, Antarctica
Altitude: 3794 meters
Average winter temperature: approx. -50 ° C
The average summer temperature: ca. -20 °
Eruptive style (prehistoric): Large volume flow of lava
Eruptive style (historical): Strombolian eruptions of ash. Lava flows mostly limited to the inner crater.
Notable features: Persistence convection a phonolite lava lake.
Erebus has a lava lake and is definitely the most active volcano in Antarctica.
Location : Ross Island, Antarctica
However, some dating age existed for the lavas of the entire Mt. Erebus and that it had been limited to imprecise conventional dating. From 1993, Dr. Philip Kyle and two of his students (Chris Harpel and Richard Esser) began to use a more advanced dating techniques dating to high precision to determine the age of the majority of lava flows exposed on the Mt. Erebus.
Before using the 40Ar/39Ar geochronology on Mt. Erebus, little data exist, and age suggested that the volcano was aged millions of years. We now know that the entire volcano is just a little older than 1 million years and that the peak is significantly younger than 100,000 years.

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The beauty of Japan's Sakurajima
(GV - June 9)
JMA reported that during the period May 27-31, Sakura-jima had four explosions with ejected tephra that fell more than 1.3 km from the crater. Incandescence from the crater is almost all times detected during the night. A small pyroclastic flow traveled 700 m down the eastern flank. A pyroclastic flow also occurred in the crater. Based on information from JMA, the Tokyo VAAC reported that on May 30 the explosions produced "feathers" that rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) and drifted E. An explosion was detected on June 1 and June 2, which produced an ash plume that rose 1.5 km (5,000 ft).
The images below is courtesy and copyright Martin Rietze

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Popocatepetl, Mexico - (GV - June 8 - 10:31 UTC)
On Friday, the monitoring system of Popocatepetl recorded 62 exhalations of low to moderate intensity, accompanied by emission of steam, gas, and sometimes small amounts of ash. Yesterday, there were four events volcanotectóniques 10:15 24:51 M 2.5 M 2.7 h to 1:03 p.m. and 9:15 p.m. M 2.4, M 2.1. During the day yesterday, the skies were not allowed to continuously observe the volcano, however, for short periods of time, it has been observed emission minor steam, gas and low ash.
When this day has remained visible and clear, a plume of steam and gas southwest stood at a height of about 400 m above the crater.

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Pavlof, Alaska, United States - (GV - June 8 - 10:31 UTC)
Ash emissions of Pavlof resumed Tuesday, June 4 and continuent.Des earth tremors and explosion signals accompany the renewed eruptive activity.
Image taken at 4:58 (Alaska time), and an analysis of the plume (assuming he remained in the field of the camera), totaled around 15,000 ft or 4.5 km. Satellite images, pilot reports, and recent views cams showed ash clouds amount to 18,000 meters and extending up to 25 miles (40 km) downwind of the volcano.
The eruptive episode began on May 13 with continuous ash emissions until May 28, when the volcano calmed down until the upturn June 4 Such breaks are common during eruptive episodes Pavlof, which often last for weeks to months. The current activity could become stronger without warning, and the AVO continues to monitor the volcano.

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Ibu, Halmahera, Indonesia - (GV - June 8 - 10:31 UTC)
Change alert IBU level, volcanologists are passed to the VSI "SIAGA" level (alert 3 on 4).
Like many volcanoes in Indonesia, Ibu is a little visited its summit. His ascension requires between 6 and 7 hours of walking on some steep slopes. Given this lack of access few inhabitants or tourists actually reached its peak. But no one needs to climb to the top that the 1325 m high building is very active. Seismic data collected by a station on the side, mid-way between the top and the first houses, and relayed in real time to the observatory located about 20 km, show that Ibu volcano is constantly erupting.

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