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. -
July 14, 2012 volcano activity
El Hierro (Canary Islands) is relatively quiet today with a few earthquakes all under M2.5 magnitude.
Small volcano-tectonic earthquakes and tremor are rattling our featured volcano, Popocatepetl (Mexico). The volcano continues to eject gas and ash columns an average of 2-3 times an hour over a twenty-four hour period.
Volcanic tremor and small earthquakes also affect Pacaya volcano (Guatemala) today. (station PCG)
In Colombia, Galeras volcano trembles with tremor and small earthquakes (station ANGV), numerous tiny earthquakes are occurring at Cumbal (station MEVN), and small low-frequency earthquakes appear on the wane at Sotara volcano (station SOSO).
Another small earthquake occurred last night within a cluster of tremors affecting the central Oregon Cascades since early July. The earthquakes are far too infrequent to be of any concern, but they are of scientific interest since they occur in an area devoid of historical seismicity with young faults and volcanoes.