Volcano activity of November 8, 2012 – Long Valley Caldera, Popocatepetl, Conception, Nevado del Ruiz, Tongariro, Ruapehu and White Island

Last update: November 8, 2012 at 5:13 pm by By

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 8, 2012 volcano activity

Several Central American sites down today, no doubt as a result of the big quake there yesterday.  Would love to see the Guatemalan volcano seismograms this morning!
The swarm of small earthquakes (M<3.0) continues beneath the South Moat of the Long Valley Caldera today. (station MRD)  In addition, a small earthquake occurred at an unusual depth of 42 km beneath the northern boundary fault of the caldera overnight.  I’m sure this depth is preliminary, but if true, it figures into the recent upsurge of such events beneath the central and eastern Sierra Nevada in the past week.
As mentioned before, no information available for Popocatepetl (Mexico) and the Guatemalan volcanoes today.
Banded volcanic tremor has appeared during the past 24 hours at Concepcion volcano (Nicaragua). (station CONN)
Seismicity remains high beneath Nevado Del Ruiz volcano (Colombia).  INGEOMINAS reports several thousand small earthquakes have occurred the past few days at depths around 5 km beneath the northern part of the volcano. (station OLLZ)
Small earthquakes still dot seismograms at Tongariro volcano (New Zealand).  Local seismicity has risen overnight at nearby Ruapehu, and banded volcanic tremor rumbles-on beneath off-shore White Island volcano.

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