Volcano activity of February 6, 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. -

February 6, 2013 volcano activity

KVERT reports no significant changes at any of the six erupting (Tolbachik, Bezymianny, Kliuchevskoi, Sheveluch, Kizimen and Karymsky) Kamchatkan volcanoes today.

Small local earthquakes are still frequent at Tanaga volcano (Aleutian arc) (station TASE).

Small earthquakes also affect Mammoth Mountain volcano (station MMS), Long Valley Caldera, and the Sierra Nevada to their immediate south again today.


Small explosions and rockfalls remain frequent at Colima volcano (Mexico).  Exhalations of gas and some volcanic ash continue at Popocatepetl volcano at an average rate of about two events per hour.  The Popo seismogram shows the Solomon Islands M8.0 earthquake as well as some possible low-frequency volcanic tremor.


The rate of volcanic earthquakes at San Cristobal volcano (Nicaragua) (station CRIN) quickened overnight.  The amplitudes of the events increased slightly as well.

The rate of occurrence of small volcanic earthquakes has decreased at Nevado del Ruiz volcano (Colombia) (station OLLZ), but the rate of tiny volcano-tectonic events remains high at Machin volcano (station CIMA).  Tiny earthquakes and occasional tremor pulses remain apparent on seismograms from Galeras volcano (station ANGV).

Episodic pulses of low-magnitude volcanic earthquakes continue at Tungurahua volcano (Ecuador) (station RETU), but at a decreasing rate, while strong co-eruptive seismicity has become more episodic at Reventador volcano (station CONE).

Internal unrest remains low at Copahue volcano (Chile-Argentina border).  The Copahue volcanocam show continued emission of a gas (and ash?) plume from the volcano.


Seismicity remains subdued at White Island volcano (New Zealand).  The Ruapehu seismogram shows numerous low-frequency earthquakes (some of these events may be teleseismic aftershocks from the Solomon Islands earthquake).  I included a volcanocam photo of Ruapehu merely for asthetic reasons.


MODIS OMI satellite data were not updated today.

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