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Volcanic activity worldwide 31 Jan 2014: Shishaldin, Dukono, Sinabung

Friday Jan 31, 2014 15:52 PM |

Pyroclastic flow at Sinabung volcano this morning
Pyroclastic flow at Sinabung volcano this morning
MODIS hot spot at Shishaldin volcano
MODIS hot spot at Shishaldin volcano
Sinabung (Sumatra, Indonesia): The eruption shows little variations as the volcano continues to effuse viscous magma at the summit vent. A part of that simply contributes to the growth of the lava dome and the viscous lava tongue that descends on the SE flank. Another part of the new magma collapses and produces rock-falls that turn into pyroclastic flows such as this morning (video):

Now that the gulley on the SE side of the volcano has mostly been filled by the lava flow, pyroclastic flows are no longer well channeled and might take other paths more to the south or east. This makes the situation for some areas more dangerous than before.

Dukono (Halmahera): More ash emissions occurred this morning. Satellite images show an ash plume extending 40 nautical miles (approx 70 km) to the east, at altitudes of around 7,000 ft (2 km).

Shishaldin (United States, Aleutian Islands): The Alaska Volcano Observatory raised the Aviation Color Code of the volcano to YELLOW and the Alert Level to ADVISORY yesterday morning. Increased steaming was seen and satellite data showed a new thermal anomaly in the summit crater indicating a new hot surface, possibly from a new lava dome. The last activity at the volcano dates back to 2004.

Volcano Activity Summary for 31 Jan 2014:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 16 Aug 2013)
Cleveland (Aleutian Islands, Alaska): sporadic small (phreatic?) explosions (updated 6 May 2013)
Colima (Western Mexico): explosions and lava flows (updated 19 Jul 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 31 Jan 2014)
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)
Fuego (Guatemala): strombolian explosions (updated 28 Aug 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013)
Heard (Australia, Southern Indian Ocean): likely lava lake in summit crater (updated 1 Aug 2013)
Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 22 Aug 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): degassing (updated 22 Aug 2013)
Kliuchevskoi (Kamchatka): ash emissions, strong steaming (updated 28 Aug 2013)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 25 Jul 2013)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 28 Aug 2013)
Marapi (Western Sumatra, Indonesia): occasional ash explosions (updated 14 Aug 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): deep-seated explosive activity, lava effusion ending (updated 28 Aug 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 12 Aug 2013)
Reventador (Ecuador): ash explosions, occasional pyroclastic flows (updated 30 Jan 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 28 Jan 2014)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 28 Aug 2013)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 22 Aug 2013)
Sinabung (Sumatra, Indonesia): growing lava dome, pyroclastic flows, occasional explosions (updated 31 Jan 2014)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 25 Jul 2013)
Suwanose-jima (Ryukyu Islands): strombolian to weak vulcanian explosions (updated 28 Aug 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tungurahua (Ecuador): new eruption since 30 Jan 2014 (updated 30 Jan 2014)
Veniaminof (Alaska Peninsula, USA): effusion of lava flows (updated 16 Aug 2013)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)

Eruption warning / minor activity:

Aso (Kyushu): steaming, occasional ash venting (updated 29 Jan 2014)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 26 Aug 2013)
Bezymianny (Central Kamchatka Depression): steaming, degassing (updated 10 Jun 2013)
Chirinkotan (Northern Kuriles): unspecified activity - possibly lava flows (updated 7 Aug 2013)
Copahue (Chile/Argentina): ash venting (updated 16 Aug 2013)
Dieng (Central Java): increased degassing (updated 28 Mar 2013)
Etna (Sicily, Italy): intermittent strombolian explosions at New SE crater, degassing from NE crater (updated 2 Aug 2013)
Galeras (Colombia): sporadic ash emissions (updated 25 Jul 2013)
Gamkonora (Halmahera): seismic swam, minor ash emissions (updated 27 May 2013)
Ibu (Halmahera, Indonesia): growing lava dome, seismic unrest (updated 9 Jun 2013)
Iliwerung (Lesser Sunda Islands): possible submarine eruption from Mt Hobal on 20 August (updated 20 Aug 2013)
Iwo-Tori-shima (Ryukyu Islands): possible small ash eruption on 6 July 2013 (updated 6 Jul 2013)
Kerinci (Sumatra): seismic unrest (updated 5 Jun 2013)
Ketoi (Kurile Islands, Russia)
Kikai (Ryukyu Islands): steaming at summit crater of Iodake, occasional weak glows (updated 5 Jun 2013)
Kirishima (Kyushu): degassing, alert lowered (updated 30 Jul 2012)
Krakatau (Sunda Strait, Indonesia): degassing (updated 27 Jun 2013)
Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Merapi (Central Java, Indonesia): sporadic phreatic explosions (updated 24 Jul 2013)
Nyamuragira (DRCongo): steaming/degassing from pit inside summit caldera (updated 18 Jul 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): degassing, sporadic small explosions (updated 28 Aug 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): weak ash explosions (updated 26 Aug 2013)
Rasshua (Central Kuriles)
Raung (East Java): strombolian activity in summit crater (updated 5 Aug 2013)
Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012)
Sacabaya (Northern Chile, Bolivia and Argentina)
Sangay (Ecuador): degassing (updated 24 May 2013)
Shishaldin (United States, Aleutian Islands)
Turrialba (Costa Rica): ash venting, strong degassing (updated 24 Jul 2013)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 5 Aug 2013)
White Island (New Zealand): strong degassing, volcanic tremor (updated 20 Aug 2013)

Vorig nieuws
Thermal image of the lava flow (Monte Cagliato webcam, INGV Catania)
Thursday, Jan 30, 2014
Etna (Sicily, Italy): The recent eruptive episode, which could be called a mainly effusive paroxysm, seem to have more or less ended. Activity if still present (weak explosions at the NSEC and lava effusion from the fissure vent at its base) has decreased a lot. Visibility and weather are bad at the moment to have a more detailed picture. ... [meer...]

Tuesday, Jan 28, 2014
Stromboli (Eolian Islands, Italy): (27 Jan) Some impressions of Stromboli volcano (Eolian Islands, Italy) in late Oct / early Nov 2013, taken during our recent tours ... [meer...]
The lava flow from Etna's New SE crater this morning
Sunday, Jan 26, 2014
Etna (Sicily, Italy): After a more vigorous phase yesterday, the effusion of the lava flow into the Valle del Bove and explosive (strombolian) activity at the New SE crater still continued this morning but have decreased in intensity. ... [meer...]
thermal webcam image of the lava flow ( by courtesy of INGV-OE Catania)
Friday, Jan 24, 2014
Etna (Sicily, Italy): The activity continued throughout the night with a constant lava effusion from the fissure vent at the eastern base of the New SE crater and with mild strombolian activity at the summit vent. ... [meer...]
Wednesday, Jan 22, 2014
Kirishima (Kyushu): The alert level of the volcano was lowered back to 1, as volcanic activity continued to decrease. Volcanic seismicity remained at low levels and no remarkable change was observed from ground deformation observation and monitoring data. ... [meer...]

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