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Volcanic activity world-wide 7 October 2012: Etna, El Hierro, Lokon, Popocatépetl, Batu Tara, Sakurajima, Brenisteinsfjöll, Yellowstone

Sunday Oct 07, 2012 14:05 PM | BY: T

Increased activity took place in the Bocca Nuova crater of Etna volcano during last night, when the tremor steeply rose. It dropped back to normal levels this morning.

It seems a new earthquake swarm has started at El Hierro volcano yesterday, when the number of quakes rose from an average of about 8-10 to 23 quakes per day. Today, so far there have been 14 events recorded, and their number is likely to rise further. The quakes are very small (mostly under M1, largest M2.0) and are concentrated at about 10 km depth in the western El Golfo and scattered in the SW part of the island at greater depths.

Lokon volcano in North Sulawesi had another explosion this afternoon, which was heard in up to 6 km distance.

Popocatépetl has not changed much. A strong SO2 plume was again visible on yesterday's NOAA satellite image.

Batu Tara produced new explosions with ash at 8,000 ft (2.4 km) altitude.

Sakurajima volcano in Japan remains relatively active. 4 explosions of moderate size occurred yesterday 6 Oct (GMT time). Ash plumes rose to 2.7-3 km altitude 9-10,000 ft).

A new earthquake swarm occurred over the weekend on the Iceland's Reykjanes peninsula, on the volcanic rift zone about 12 km SW of Brenisteinsfjöll volcano. The largest quakes was a M3.8 event at 5 km depth on Friday at 19:42 UTC.

A minor seismic swarm occurred at Yellowstone, but falls into what is normal activity at a large active caldera.
Previous news
Saturday, Oct 06, 2012
New explosions occurred at Lokon volcano in North Sulawesi which erupted 3 times yesterday evening, producing ash plumes rising 1.5 km above the crater and ejecting glowing bombs to 350 m height. ... [more]
Thursday, Oct 04, 2012
Earthquakes have picked up again (but not much) in numbers at El Hierro volcano. As before, the quakes are concentrated in the western El Golfo and central areas of the island. ... [more]
Wednesday, Oct 03, 2012
A thermal hotspot was detected at Michael volcano in the South Sandwich Islands yesterday on MODIS satellite imagery, suggesting that new activity is taking place, possibly a small lava lake forming as during periods of activity in recent years. ... [more]
Tuesday, Oct 02, 2012
October starts as a volcanically calm month. A few updates for today summarized (as usual, the links point to more detailed reports): ... [more]

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