Volcano activity of August 15, 2012 - Tungurahua, Nevado del Ruiz, Galeras, Sotara, Popocatepetl, Tongariro, White Island, Ambrym and Etna

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. -

August 15, 2012 volcano activit
Tungurahua (Ecuador) continues to be the star volcanic performer of the week, producing ashfall on surrounding communities, loud explosions and lots of volcanic tremor. (station RETU)

To the north, the Nevado Del Ruiz volcanic system (Colombia) remains unstable, generating volcanic tremor, small explosion signals and volcanic earthquakes. (station OLLE)

Nearby Galeras volcano (Colombia) trembles with pulses of volcanic tremor and small earthquakes as well. (station ANGV)

Weak volcanic earthquakes are still evident on seismograms at Sotara volcano (Colombia).  Inflation of the epicentral region of the earthquakes (detected by GPS measurements) was noted a weekly report issued yesterday by INGEOMINAS.  (station SOSO)

Popocatepetl volcano (Mexico) continues to exhale gases and ash an average of once per hour today. Small earthquakes and tremor are barely visible on the Popo seismogram.

cross the pond, in New Zealand, Tongariro volcano dozes while White Island volcano shakes with continuous volcanic tremor.

Satellite imagery shows SO2 plume activity at Ambrym (Vanuatu) and Etna (Sicily) volcanoes.


  1. Ivan Groznyy erupts in Kuril Islands

  2. MattTheTubaGuy says

    "cross the pond" LOL!
    If Tongariro decides to erupt properly, I might hop to the North Island to watch. (I'm in CHCH, quake city NZ)