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Volcanic activity world-wide 24-25 September 2012: Sakurajima, Batu Tara, Manam, Langila, Popocatepetl, San Cristobal, Telica, San Miguel, Fuego, Santiaguito, Nevado del Ruiz, Galera, Little Sitkin, Kamchatka volcanoes

Tuesday Sep 25, 2012 12:29 PM | BY: T

After a week of relatively low and infrequent explosions, Sakurajima volcano has stepped up its activity with 3 eruptions during the early hours of yesterday. The largest at 12:52 h local time produced an ash plume rising to 11,000 ft (3.4 km).

After a few days with no larger ash eruption detected, Batu Tara erupted again this morning and produced an ash plume rising to 8,000 ft as reported by a pilot early today.

In Papua New Guinea, a weak SO2 plume is still visible from Manam volcano and today as well from Langila. Both volcanoes are probably active at the moment.

Popocatépetl, Mexico: The frequency of explosions has drastically dropped to only about one every 3-4 hours, but lava glow above the crater and strong SO2 emissions indicate that lava continues slowly to rise at the volcano and build up the lava dome in the crater.

In Nicaragua, San Cristobal volcano seems to be calming down further. The seismic activity is decreasing, although a few earthquakes still occur. INETER has not published any reports since 16 Sep, suggesting that not much activity is happening.

Many small quakes and tremor pulses appear on the seismic recording of Telica volcano,- probably corresponding to ongoing minor activity inside its crater.

In El Salvador, seismic activity at San Miguel volcano remains elevated, but has been decreasing over the past days.

Volcanic activity in Guatemala remains at relatively low levels, with Fuego producing small to medium-sized strombolian explosions, while the lava dome of Santiaguito produces intermittent minor explosions and small rock avalanches.

Nevado del Ruiz volcano produces a strong SO2 plume drifting towards te Pacific. Seismicity at the moment is low and there is no tremor visible.

Weak seismic activity with some quakes and long-period events continue to be registered at Galeras.

Kamchatka updates:
Karymski (Kamchatka) has occasional ash explosions with plumes up to about 5 km altitude (15,000 ft).

Moderate seismicity was registered at Kizimen volcano in Kamchatka. According to seismic data, ash plumes possibly rose up to 11,800 ft (3.6 km) a.s.l., KVERT reports. A recent webcam image captured by Peter Webley from 20 Sep showed and ash plume probably caused by a small pyroclastic flow likely triggered by rock avalanches from the lava flow.

Weak seismic activity and occasional small explosions continue at Sheveluch volcano, and a thermal anomaly is visible at the volcano indicating continuing slow lava dome growth (calculated to 2.6 m3/second). The KVERT webcam showed an ash eruption on 20 Sep.

Gorely has moderate seismicity and produces a weak gas and steam plume.

Thermal anomalies are also present at Bezymianny and Klyuchevskoi volcanoes, suggesting that the lava dome continues to grow at Bezymianny and probably small explosions continue at the summit of Kliuchevsky.
Previous news
Thursday, Sep 20, 2012
During a visit to the summit crater of Etna volcano this afternoon, we could hear deep-seated explosion sounds at intervals of few minutes from the Voragine pit crater, suggesting that some activity is going on deep (several 100 m) within its conduit. Sporadic explosive activity from adjacent Bocca Buova ceased about a week ago according to the Etna mountain guides. ... [more]
Wednesday, Sep 19, 2012
Fuego volcano, Guatemala has increased its activity again. Strong strombolian explosions generated ash plumes rising up to 1 km and ejected blocks up to 200 m above the rim. Incandescent material rolled down the flanks for 500-1000 m and shock waves accompanied the explosions. ... [more]
Tuesday, Sep 18, 2012
Soputan volcano in North Sulawes had a new explosive eruption this afternoon and produced lava fountains of several hundred meters height and an ash plume rising to 30,000 ft or about 10 km. ... [more]

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