Volcano activity of November 27, 2012

This (almost) daily post intends to follow up the activity changes of volcanoes all over the world.
This post is written by geologist Richard 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. -

November , 2012 volcano activity

Small earthquakes still affect Little Sitkin volcano (Aleutians) (station LSSA) and have become frequent again at Iliamna volcano (Alaska Range) the past few weeks (no seismic record).
Gas and ash emissions now occur at an average rate of 2 per hour at Popocatepetl volcano (Mexico).  The Popo seismogram shows at least one small, local earthquake (repeated many times due to a software glitch!) and some volcanic tremor today.
Seismicity at Pacaya (Guatemala) (station PCG) has declined from continuous tremor to frequent small volcanic earthquakes, while volcanic tremor briefly increased overnight at Santa Maria volcano (station STG6).
Tremor remains slightly elevated at Masaya volcano (Nicaragua) (station MASN).
Seismograms for the Colombian volcanoes we watch were again unavailable today.
Co-eruptive seismicity is up again at Reventador volcano (Ecuador) (station CONE).
Low-level volcanic tremor fluctuates in amplitude at Ruapehu volcano (New Zealand), a few small earthquakes occurred the past day at nearby Tongariro volcano, and relatively strong volcanic tremor rumbles-on beneath White Island volcano.
Recent satellite imagery shows SO2-enriched plumes drifting from Popocatepetl and Nevado Del Ruiz (Colombia) volcanoes.

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