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Volcanic activity world-wide 8-9 November 2012: Raung, Popocatépetl, Fuego, Santiaguito, Nevado del Ruiz, Soputan, Sakurajima, Hawaii, Klyuchevskoy, Mammoth Mountain, Tjörnes Fracture Zone

Friday Nov 09, 2012 07:51 AM | BY: T

A larger explosion with an ash plume rising 6-7 km from Raung volcano in East Java was reported on 8 Nov, but it seems that the report, based on a pilot observation was actually false.

Popocatépetl in Mexico increased the frequency of emissions/explosions, more than 2 per hour on average during 6-7 Nov and about 3 during 7-8 Nov. Their intensity of most emissions is very weak, and only the strongest ones produce small ash plumes rising up to 1 km above the crater. Glow remains visible at night and SO2 emissions are elevated, suggesting that magma continues to rise within the volcano.

Activity of Fuego volcano and Santiaguito has not changed. Fuego had 13 weak strombolian explosions counted between 7-8 Nov and the lava flow being about 600 m long. Santiaguito's block lava flows were still active on 8 Nov and there are occasional mostly weak explosions from the lava dome.

A seismic swarm began at Nevado del Ruiz volcano around 5 Nov when a 2.2 local magnitude earthquake occurred at 01:38 local time and is continuing with over 2000 small quakes recorded so far. This might suggest that new magma is intruding under the volcano. According to INGEOMINAS, the situation does not merit a change in alert level from yellow (2 on a scale of 4) to orange (3).

Soputan volcano (Indonesia) produces a small SO2 plume visible on today's satellite image for the North Sulawesi region. Increased degassing from the volcano could indicate some new activity there.

Activity at Sakurajima volcano in Japan has increased since 8 November, with at least 6 explosions of moderate size during the past 24 hours. One this morning at 06:27 GMT produced an ash plume that rose to 13,000 ft (4.3 km).

At Kilauea volcano on Hawai'i, deflation continued, but the summit lava lake in Halema'uma'u remained stable. Seismic activity has calmed down compared to last week.
At Pu`u `O`o, small lava flows issued from a south floor source while the rim of the NE perched lava lake collapsed just after midnight. Lava flows southeast of Pu`u `O`o continued to be active on the coastal plain but are still far from the ocean.

USGS has not recorded any significant activity during the past month in the other active Hawaiian volcanoes (Mauna Loa, Lo'ihi Seamount, Hualalai, and Haleakala on Maui).

Glow at night and a thermal anomaly detectable on satellite data suggest that mild strombolian activity in the summit crater of Klyuchevskoy volcano in Kamchatka continues.

The shallow earthquake swarm at Mammoth Mountain west of the Long Valley caldera (California) seems to be ending.
Similarly, the swarm that has been plaguing the Tjörnes Fracture Zone north off Iceland continues to slow down after having been going on for more than 2 weeks.
Previous news
Wednesday, Nov 07, 2012
Strombolian activity has been observed at Raung volcano in East Java during a visit by two of our local expedition organizers in Indonesia. ... [more]
Monday, Nov 05, 2012
The seismic swarm in the Tjörnes Fracture Zone north off Iceland continues with little changes. About 50-100 earthquakes mostly of magnitudes of around 1-2 are being recorded daily. The largest recent one was a felt magnitude 3.8 quake at 5.6 km depth on Saturday 3 Nov. ... [more]
Friday, Nov 02, 2012
An increased number of earthquakes can be noted beneath Askja volcano in Iceland during the recent days, and the tremor signal is elevated as well, although far from alarming levels. The volcano is certainly one to watch out for. ... [more]
Wednesday, Oct 31, 2012
The seismic swarm in the Tjörnes Fracture Zone north off Iceland continues into its 10th day and the frequency of quakes has even picked up again a bit. An warning for a possible larger earthquake remains in place. ... [more]
Monday, Oct 29, 2012
The week starts with little significant volcano activity to report. Some updates include: ... [more]

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