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Volcanic activity worldwide 27 Nov 2013: Sinabung, Suwanose-jima, Etna

Wednesday Nov 27, 2013 17:03 PM |

Continuous ash emissions from Sinabung today (VSI webcam)
Continuous ash emissions from Sinabung today (VSI webcam)
Etna (Sicily, Italy): No significant changes have occurred. The New SE crater remains restless with some occasional weak activity, visible from time to time as faint glow on the webcam at night. Tremor is currently low.

Suwanose-jima (Ryukyu Islands): Explosive activity has resumed at the remote volcano in the Tokara Island chain. VAAC Tokyo reported explosions yesterday and this morning, with ash plumes rising to 4,000-6,000 ft (1.2-1.8 km) altitude.

Sinabung (Sumatra, Indonesia): The volcano continues to produce near-constant ash venting. The emissions produce a plume rising to estimated 18,000 ft (5.7 km) altitude.

It seems that the more powerful discrete explosions during the past days have somewhat cleared the conduit, allowing for a more constant (and less violent) eruption of magma. The risk of sudden, more powerful explosions remains however high, because the magma involved (likely dacite) is very viscous.

Volcano Activity Summary for 27 Nov 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 16 Sep 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 16 Nov 2013)
Barren Island (Indian Ocean): new eruption in mid October 2013 (updated 17 Oct 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 6 Nov 2013)
Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013)
Colima (Western Mexico): lava flow on upper eastern flank (updated 24 Nov 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 23 Oct 2013)
Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012)
Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013)
Etna (Sicily, Italy): degassing, seismic unrest (updated 23 Nov 2013)
Fuego (Guatemala): strombolian activity at summit, lava flow emission on upper slopes (updated 26 Nov 2013)
Ibu (Halmahera, Indonesia): growing lava dome, seismic unrest (updated 23 Oct 2013)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 6 Nov 2013)
Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 13 Aug 2013)
Kizimen (Kamchatka): growing lava dome and incandescent rock avalanches (updated 15 Oct 2013)
Klyuchevskoy (Kamchatka): strong steaming, likely strombolian activity in summit crater (updated 25 Nov 2013)
Nishino-shima (Volcano Islands, Japan): stromboliam activity, cone-building (updated 23 Nov 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 12 Jun 2013)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): strombolian activity and lava flow (updated 26 Nov 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 12 Aug 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): sporadic mild to moderate explosions (updated 22 Nov 2013)
Reventador (Ecuador): ash explosions, occasional pyroclastic flows (updated 14 Nov 2013)
Sakurajima (Kyushu, Japan): constant ash emissions and strong explosions (updated 24 Nov 2013)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 26 Nov 2013)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 18 Oct 2013)
Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 25 Nov 2013)
Sinabung (Sumatra, Indonesia): ash venting and vulcanian explosions (updated 27 Nov 2013)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 3 Nov 2013)
Suwanose-jima (Ryukyu Islands): Mt Ontake volcano of Suwanose-jima Island, Japan (updated 27 Nov 2013)
Telica (Nicaragua): normal (low) seismic activity (updated 26 Sep 2013)
Tungurahua (Ecuador): strombolian activity, strong ash emissions (updated 3 Nov 2013)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 20 Nov 2013)
Zhupanovsky (Kamchatka, Russia): new explosive activity since 23 Oct (updated 6 Nov 2013)

Eruption warning / minor activity:

Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 13 Oct 2013)
Chirinkotan (Northern Kuriles): unspecified activity - possibly lava flows (updated 22 Nov 2013)
Copahue (Chile/Argentina): ash venting (updated 16 Nov 2013)
Dieng (Central Java): increased degassing (updated 28 Mar 2013)
Heard (Australia, Southern Indian Ocean): likely lava lake in summit crater (updated 14 Nov 2013)
Iliwerung (Lesser Sunda Islands): possible submarine eruption from Mt Hobal on 20 August (updated 20 Aug 2013)
Jebel Zubair (Red Sea): no signs of activity after 24 Nov 2013 (updated 26 Nov 2013)
Karangetang (Siau Island, Sangihe Islands, Indonesia): lava extrusion at summit crater, strombolian activity, glowing avalanches (updated 4 Sep 2013)
Kerinci (Sumatra): occasional ash explosions (updated 5 Jun 2013)
Ketoi (Kurile Islands, Russia)
Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012)
Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 22 Nov 2013)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 24 Sep 2013)
Marapi (Western Sumatra, Indonesia): occasional weak explosions (updated 13 Nov 2013)
Merapi (Central Java): moderate gas and ash plume on 22 july (updated 26 Nov 2013)
Nevado del Ruiz (Colombia): seismic unrest (updated 7 Oct 2013)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Poas (Costa Rica): occasional small phreatic explosions from lake (updated 22 Aug 2013)
Popocatépetl (Central Mexico): steam/gas/ash emissions (updated 26 Nov 2013)
Raung (East Java): strombolian activity in summit crater (updated 5 Aug 2013)
Tangkubanparahu (West Java): occasional phreatic explosions (updated 15 Oct 2013)
Turrialba (Costa Rica): ash venting, strong degassing (updated 24 Jul 2013)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 26 Nov 2013)

Previous news
Glow from Etna's New SE crater last evening
Tuesday, Nov 26, 2013
Etna (Sicily, Italy): No changes in activity have occurred since yesterday. Very occasionally, glow from the summit vent at the NSEC and from a vent at its southern base is visible, suggesting ongoing sporadic deep-seated explosions inside the cone. Tremor is low at the moment. ... [more]
Glow from Etna's New SE crater this morning
Monday, Nov 25, 2013
Etna (Sicily, Italy): The New SE crater is restless. Occasional glow from the summit vent suggest that deep-seated strombolian activity continues. At the same time when this activity was visible, a glowing spot at the southern base was present as well. This could be a small effusive vent that is activated briefly during phases the magma column rises high enough inside the conduit. ... [more]
Explosion from Sakurajima this morning (Tarumizu MBC webcam)
Sunday, Nov 24, 2013
Sakurajima (Kyushu, Japan): After a short phase of weaker activity, the volcano began to erupt more violently yesterday with a series of powerful explosions that sent ash plumes up to 15,000 ft (4,5 km). Near-constant ash emissions have been taking place from the Showa crater. ... [more]
Eruption of Etna this morning (Etna Trekking webcam image)
Saturday, Nov 23, 2013
Etna (Sicily, Italy): The latest paroxysm (nr 17 in 2013) at the New SE crater of Mt Etna occurred this morning, just less than one week after the previous one last weekend. ... [more]
New SE crater of Etna this evening
Friday, Nov 22, 2013
Etna (Sicily, Italy): The New SE crater is not completely quiet: there are small strombolian explosions, sometimes with lava ejections and sometimes only indicated by occasional weak glow from both the summit vent. In addition, at the same time increased glow is visible at the effusive vent on the east side of the cone. The latter has shown a similar behavior for the past two weeks before and after the main phases of the eruption. It seems to become active whenever the internal pressure in the conduit increases during explosions, and reacts by squeezing out small amounts of lava. ... [more]

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