Volcano activity of July 3, 2012 - Canary Islands, Mexico and Colombia

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 3, 2012 volcano activity

Strong bursts of spasmodic tremor continue to strike beneath the western coastline of El Hierro island (Canary Islands), but seismicity remains centered some 20 km deep. Click here for our in-depth reporting of the El Hierro events.

Spasmodic tremor also continues at Popocatepetl volcano (Mexico) this afternoon.  Small volcano tectonic earthquakes there have decreased in number over the past day.

Small earthquakes and pulses of volcanic tremor continue at Galeras volcano (Colombia) as well.

Nearby Nevado Del Ruiz volcano (Colombia) has returned to low levels of seismicity following somewhat of a "surprise" eruption there two days ago.  Seismic precursors to the eruption occurred only minutes before.

A relatively staid day in global volcanism overall.

We have created a special page to screen upper level seismicity at volcanoes in California, Ethiopia and Eritrea and the Canary Islands.  Researchers and interested people can subscribe to one or more of these lists to follow up this kind of seismicity, which normally goes undetected for a long time in the daily avalanche of earthquakes. We have limited the number of volcanoes to those with a proven eruption or activity record in recent history. Whenever you have a special wish, please let us know with the contact form. Much more to come of course.

Popocatepetl activity on July 3 2012

Seismogram El Hierro, Canary Islands July 3 2012 - image courtesy IGN

Galeras volcano Colombia