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 10, 2012 volcano activity
Much reduced seismicity continues at El Hierro (Spain) today,…but included an M3.8 magnitude earthquake. Hypocentral depths for events remain around 20 km.
The earthquake swarm at Popocatepetl (Mexico), which I mentioned yesterday was “ending”, has ramped-up with some larger magnitude events and tremor during the past 24 hours.
Fuego volcano (Guatemala) has exhibited elevated tremor the past 24-48 hours. We may be in-store for another outburst similar to those occurring at the volcano over the past few months. (station FG3)
I inquired with Dr. John Vidale (director of the UW seismology lab) about an unusually deep (30 km) earthquake (orange dot) which occurred near Newberry volcano several days ago. Upon re-analysis, both the location AND DEPTH of the Oregon Cascades earthquake changed! So, while the event locates with the others occurring over 04 July and 08 July, it’s depth is very shallow rather than very deep! The cluster of shallow events near volcanoes is still interesting though.