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Volcanic activity world-wide 12 September 2012: San Cristobal, San Miguel, Nevado del Ruiz, Sotará, Machin, Popocatépetl, Tungurahua, Little Sitkin, Stromboli, Batu Tara, Sakurajima, White Island

Wednesday Sep 12, 2012 15:32 PM | BY: T

San Cristobal volcano had 3 small explosions yesterday afternoon (at 3:33, 3:35 and 3:36 p.m.). Small steam and ash clouds rose 300 m above the crater.

Seismicity remains elevated at San Miguel volcano in El Salvador. Lots of tremor pulses and small quakes appear on the seismograms.

Popocatépetl volcano, Mexico: A strong SO2 plume could be seen on NOAA's satellite image yesterday. The activity remains stable and at low levels. CENAPRED reports steaming and about 10 small explosions per day.

Nevado del Ruiz volcano is steaming and has occasional weak explosions with ash venting (such as one on 6 Sep at 09:02 local time). There is relatively low-energy seismic activity.

At the moment, seismicity Cerro Machin is calm again. INGEOMINAS reports about the recent 2 earthquake swarms on 9 Sep between 7:30 and 8:30 (local time) and the following day 10 Sep between 07:20 and 14:00: the quakes during these swarms were felt by inhabitants of villages near the volcano. The epicenters of the quakes were clustered at 2-4 km depth W and S of the summit dome, and the largest was the M3.6 event on 9 Sep.

Sotará volcano continues to show seismic unrest as well and remains only at yellow alert.

Tungurahua volcano remains relatively quiet, but direct observations are difficult to cloud cover. The seismic signal is low with some weak tremor pulses.

Seismic swarms continue to appear at Little Sitkin volcano.

Stromboli volcano's seismic signal suggests that activity is low these days. Weak explosion signals are visible every 5 minutes or so.

Batu Tara had new explosions today to send ash to 7,000 ft altitude.

A nice webcam video of a beautiful explosion of Sakurajima volcano last night has been posted.

Seismic activity at White Island remains slightly elevated. A weak tremor signal can occasionally be seen on the spectrogram.
Previous news
Tuesday, Sep 11, 2012
A new eruption has started 2 days ago at Karangetang volcano. Lava flows (perhaps pyroclastic flows as well) have approached or reached villages nearby where residents were evacuated. ... [more]
Monday, Sep 10, 2012
At the moment, there are no new eruptions from San Cristobal volcano and the seismic signal looks rather quiet as well. As INETER mentions in its latest bulletin, explosions could resume, as an elevated SO2 output suggests that more magma is under way. ... [more]
Sunday, Sep 09, 2012
The news have been dominated by the new eruption of San Cristobal volcano in Nicaragua. As of now, the eruption seems to be ending or pausing, as there is only little if any explosive ash emission still going on. ... [more]
Saturday, Sep 08, 2012
Apoyeque volcano near Managua, Nicaragua, has been experiencing a seismic swarm of shallow quakes including several larger than magnitude 3 since Thursday. ... [more]
Wednesday, Sep 05, 2012
Krakatau volcano has been calm since 3 Sep. We posted some reports and photos from our expedition groups who happened to be there during 3-4 September. ... [more]

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