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. -
January 17, 2013 volcano activity
KVERT reports a continued elevated level of volcanic tremor at Plosky Tolbachik today. Two new lava flows have appeared on the southeastern flank of Kizimen volcano since it re-erupted on 28 December 2012. At the time of this writing, neither the Tokyo VAAC, nor the KVERT have issued anything pertaining to possible activity in the Kurile Islands.
Occasional local earthquakes have continued at Mount Spurr, Iliamna, Four-peaked, Akutan and Makushin volcanoes (AK) during the past week.
A swarm of small earthquakes (M<M1.0) continues beneath Mammoth Mountain volcano (CA) today (station MMS). I missed a short-lived swarm of larger earthquakes (M2-M3) at the southern base of Mount Konocti volcano (Clear Lake Volcanic Field) (CA) last week (08-10 January 2013). While swarm activity is continuous to the south (beneath the Geysers geothermal production area), such activity is infrequent beneath the volcanic field.
Small volcanic earthquakes have appeared again on seismograms at Colima volcano (Mexico) during the past few hours, suggesting another explosion may be in the offing there. Exhalations of gas and some ash occur an average of once per hour at Popocatepetl volcano today.
Seismicity has remained relatively low at all three Guatemalan volcanoes during the past 24 hours. I believe wind noise affects seismograms at Fuego (station FG3) and Pacaya (station PCG), since it appeared simultaneously at both volcanoes. The large “red” event is a regional earthquake. Seismograms at Santa Maria volcano (station STG6) continue to be plagued by malfunctioning seismic equipment, hence the “spikey” appearance of seismic records there.
Numerous volcanic earthquakes, occasionally merging into volcanic tremor, continue at San Cristobal volcano (Nicaragua) (station CRIN). Volcanic tremor remains somewhat elevated at Masaya volcano (station MASN), and amplitudes, but not numbers, of volcanic earthquakes have declined at Concepcion volcano (station CONN) overnight.
Both local and regional earthquake activity punctuates continuous low-level volcanic tremor at San Miguel volcano (El Salvador) (station VSM) today.
Numerous small earthquakes continue to afflict Colombian volcanoes Nevado Del Ruiz (station OLLZ), Machin (station CIMA), and Galeras (station ANGV).
Vigorous volcanic seismicity accompanies strong degassing at Reventador volcano (Ecuador) (station CONE) again today.
Volcanic seismicity remains high at Copahue volcano (Chile-Argentina border) with over 1000 events recorded during the past 24 hours.
Volcanic tremor continues to “saturate” seismograms from White Island volcano (New Zealand). Seismicity is relatively low (other than wind noise!) at compatriot volcanoes, Ruapehu and Tongariro.
@JohnSeach reports today on Twitter :
- Volcanic ash from subduction zone volcanoes rapidly release nutrients into ocean. Act as fertilizer. http://bit.ly/13FNAPD
- Volcanoes can cause fatalities without erupting. http://bit.ly/V6BOZH
- Dramatic comparison of Australian
bushfires vs Tolbachik volcano eruption this week.
Recent satellite imagery shows SO2-enriched plumes drifting from Nevado Del Ruiz, Ambrym (Vanuatu), and Nyiragongo (DRC) volcanoes.