Volcano activity of March 22, 2013

This (almost) daily post intends to follow up the activity changes of volcanoes all over the world.
This post is written by geologist Rodger Wilson who specializes in Volcano seismicity and Armand Vervaeck. Please feel free to tell us about new or changed activity if we haven't written about it. -

March 22, 2013 volcano activity

Well, there are volcanoes who attract attention by unusual behavior,...and then there are volcanoes which demand attention by their unusual behavior!  Telica volcano (Nicaragua) (station TELN) and El Hierro (Canary Islands) (station CHIE) are both demanding our attention at this time!

At Telica volcano, hundreds of earthquakes, with magnitudes as high as M2.1, have shook the volcano for the past week.  Thus far, Nicaraguan authorities have not described other indicators of magmatic activity (deformation, increased fumarolic activity) beneath the volcano.

At El Hierro, similar activity but with event magnitudes as high as M3.8 (yesterday) cluster around 15 km depth beneath the island.  Deformation (uplift) as measured by GPS instrumentation ranges from 10 to 35 mm since renewed unrest began some three days ago.  The activity currently is centered just off the western shoreline of El Hierro. Follow our in-depth reporting here.



KVERT reported a slight decrease in volcanic tremor amplitude at Tolbachik volcano overnight.  No changes were reported in the eruptive/seismic behavior of the other four active Kamchatkan volcanoes: Sheveluch, Bezymianny, Kizimen, and Karymsky.  Moderate seismicity continues at hydrothermally active Gorely volcano.



Small local earthquakes remain frequent at Iliamna volcano (Alaska Range) (station INE) and small earthquakes continue at/in the vicinity of Tanaga volcano (Aleutian arc) (station TASE).

Hybrid earthquakes, explosions and rockfalls continue at a high level at Colima volcano (Mexico) while exhalations (of gas mixed with small amounts of volcanic ash) have decreased to about once an hour on average at Popocatepetl volcano.  The Popo seismograms shows tiny volcano-tectonic earthquakes, volcanic tremor, small exhalation signals, as well as one regional (the largest signal) earthquake.  Recent MODIS satellite imagery shows a "hotspot" (corresponding to the growing lava dome) at the summit of Popocatepetl volcano.



Volcanic earthquakes (with occasional short bursts of emission tremor) are frequent today at Pacaya volcano (Guatemala) (station PCG).  Seismicity is relatively staid at Fuego volcano (station FG3) but trains of (exhalation?) tremor there appear to be lengthening in duration since early this morning.  Recent MODIS satellite thermal imagery captured the active lava flow now descending two drainages at the volcano. Hybrid earthquakes at Santiaguito Dome Complex (Santa Maria volcano) (station STG3) have become less frequent but of higher magnitude since yesterday's series of explosions/avalanches there.  Recent OMI satellite data shows the residual SO2-enriched plume from the increased activity at Santiaguito.


Volcanic tremor and earthquakes have once again increased at San Miguel volcano (El Salvador) (station VSM).  Telemetry (electronic) interference makes for a "messy" seismic record of the activity.

Tiny seismic events that have been frequent at Poas volcano (Costa Rica) (station POA2) the past few days have either diminished in their rate of occurrence, or are now obscured by a slightly higher level of background tremor at the volcano.

Tiny local earthquakes are visible on seismograms at Machin volcano (Colombia) (station CIMA) today.

Numerous low-magnitude volcanic earthquakes continue at Tungurahua volcano (Ecuador) (station RETU) as episodes of higher magnitude volcanic earthquakes rattle Reventador volcano (station CONE).  Brief views of both volcanoes (from their usual swaddling of rain clouds) revealed strong gas emission at each.  Small earthquakes continue to be visible on seismograms from Cotopaxi volcano (station CO1V).

Volcanic tremor re-strengthened overnight at White Island volcano (New Zealand).  Footage of the recent behavior of White Island is available on the GNS website. The video below who was recorded in January shows the hydrothermal eruptions at the island.

Recent OMI satllite imagery shows SO2-enriched plumes of varying sizes drifting from Santa Maria, Nevado Del Ruiz, Etna (Italy), Nyiragongo (DRC), Ambrym (Vanuatu), and both Langila (possibly drifted-in from Manam) and Tavurvur (New Guinea), as well as Soputan(?)(Lokon?) volcanoes.  MODIS satellite thermal imagery detected "hotspots" at Sheveluch, Tolbachik, Popocatepetl and Fuego volcanoes.


  1. cerey Runyon says:

    I think that the Earth has had enough with us...

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