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Volcanic activity worldwide 18 Dec 2013: Shiveluch, Dukono, Galeras, Nevado del Huila, Nevado del Ru...

Wednesday Dec 18, 2013 16:28 PM |

Lava effusion from the new effusive vent at the lower NE flank of Etna's NSEC (photo from last evening: Emanuela / VolcanoDiscovery Italia)
Lava effusion from the new effusive vent at the lower NE flank of Etna's NSEC (photo from last evening: Emanuela / VolcanoDiscovery Italia)
Ash emissions from Galera yesterday (INGEOMINAS)
Ash emissions from Galera yesterday (INGEOMINAS)
Etna (Sicily, Italy): (17 Dec) Weak lava effusion continues from the fissure on the lower NE flank of the New SE crater. Explosive activity seems to have ceased and tremor has descended back to low levels.

Shiveluch (Kamchatka): Several ash plumes up to altitudes of 27,000 ft (8 km) altitude were spotted by VAAC Tokyo during the past 24 hours, indicating that activity at the growing lava dome in form of explosions and/or avalanches/pyroclastic flows remains elevated.

Dukono (Halmahera): A major eruption might have occurred at the volcano this morning: an ash plume rising to 45,000 ft (14 km) altitude and extending more than 100 km to the NW was reported by VAAC Darwin at 07:32 GMT this morning. If this IS a volcanic ash plume and not an unusually large storm cloud, it means that a major, possibly sub-plinian eruption has occurred at the volcano. We will update this post when more information is available, or post comments.
The advisory states:
... [read more]

Nevado del Huila (Colombia): No significant changes in the volcano's activity of degassing and small earthquakes have occurred during the past months. INGEOMINAS' alert level remains yellow.

Machin (Colombia): Seismic activity remains at slightly elevated levels, and INGEOMINAS keeps the volcano at yellow.

Galeras (Colombia): The volcano's activity has remained at similar levels as during the past weeks, with sporadic ash emissions such as yesterday, when a plume rose to up to 1 km above the crater.
Magma is slowly rising within the edifice, reflected also by low to moderate seismicity and SO2 emission values reported by INGEOMINAS.

Nevado del Ruiz (Colombia): Volcanic activity at the surface (degassing) and inside (earthquakes) has remained comparably low.
During the last week, volcano-tectonic type earthquakes associated with rock fracturing within the volcanic structure occurred mainly in areas north, northeast and west of the Arenas crater at shallow depths between 2.8-4 km. The maximum magnitude recorded was a 2.8 ML (Local Magnitude) event at 13:27 (local time) on 14 December.

Cumbal (Colombia): INGEOMINAS reported slightly elevated seismic activity during the previous week at the volcano. Small earthquakes related to internal fluid movements are clustered at shallow depth (0-2 km) beneath the La Plazuela crater.

Sotará (Colombia): Internal (seismic) activity remains low, but above background and the volcano's status is unchanged at yellow.

Volcano Activity Summary for 18 Dec 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 5 Dec 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 10 Dec 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): explosions and lava flows (updated 5 Dec 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 18 Dec 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 15 Dec 2013)
Fuego (Guatemala): strombolian activity at summit, lava flow emission on upper slopes (updated 16 Dec 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)
Klyuchevskoy (Kamchatka): ash emissions (updated 12 Dec 2013)
Nishino-shima (Volcano Islands, Japan): lava effusion enlarging the new island (updated 16 Dec 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 10 Dec 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 12 Aug 2013)
Reventador (Ecuador): ash explosions, occasional pyroclastic flows (updated 14 Nov 2013)
Sakurajima (Kyushu, Japan): constant ash emissions and strong explosions (updated 10 Dec 2013)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 10 Dec 2013)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 18 Oct 2013)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 18 Dec 2013)
Sinabung (Sumatra, Indonesia): seismic crisis, degassing, ash venting, occasional explosions (updated 17 Dec 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 6 Dec 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:

Barren Island (Indian Ocean): lava flows (?) (updated 15 Dec 2013)
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)
Galeras (Colombia): sporadic ash emissions (updated 18 Dec 2013)
Heard (Australia, Southern Indian Ocean): likely lava lake in summit crater (updated 6 Dec 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)
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)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 5 Dec 2013)
Marapi (Western Sumatra, Indonesia): occasional ash explosions (updated 9 Dec 2013)
Merapi (Central Java): sporadic phreatic explosions (updated 12 Dec 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 9 Dec 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): weak ash explosions (updated 5 Dec 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 5 Dec 2013)

Previous news
Thermal image of the New SE crater (INGV Catania)
Tuesday, Dec 17, 2013
Etna (Sicily, Italy): It seems that the latest, highly unusual paroxysm can be regarded as over. Lava effusion ceased (or almost completely ceased) over night and tremor has continued to drop to again low levels. ... [more]
Current tremor signal (ESLN station, INGV Catania)
Monday, Dec 16, 2013
Etna (Sicily, Italy): What started as a paroxysm has now become more a subterminal dominantly fissure eruption. Lava effusion continues from the vent at the SE base of the New SE crater, accompanied by strong, fluctuating tremor. Bad weather conditions mostly prevent good views. ... [more]
Explosions, ash and lava flow emission at Etna's New SE crater at dawn
Sunday, Dec 15, 2013
Etna (Sicily, Italy): The 20th paroxysm at the New SE crater in 2013 began yesterday evening and ended at dawn, shortly after reaching its peak. The eruption lasted relatively long, but was relatively weak in intensity (compared to previous paroxysms). It produced only relatively low pulsating lava fountains with associated ash plumes and a small lava flow to the SE towards the Valle del Bove. ... [more]
Strombolian activity at the New SE crater
Saturday, Dec 14, 2013
Etna (Sicily, Italy): Strombolian explosions are becoming stronger and impressive, even on the webcam images now. ... [more]
View of Etna from Paternó (SW side) with the plume from the NE crater
Friday, Dec 13, 2013
Etna (Sicily, Italy): While the New SE crater has remained quiet, the NE crater became active earlier today and continues to produce a dense gas plume containing fine ash, likely from deep-seated explosions. The tremor has dropped a bit again, but remains elevated. ... [more]

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