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Volcanic activity worldwide 28 Mar 2014: Grímsvötn, Hekla

vendredi mars 28, 2014 21:00 |

Earthquakes under Grímsvötn volcano, probably a result of the glacial flood (Icelandic Met Office)
Earthquakes under Grímsvötn volcano, probably a result of the glacial flood (Icelandic Met Office)
Strain and earthquakes under Hekla volcano (Iceland Met Office)
Strain and earthquakes under Hekla volcano (Iceland Met Office)
Grímsvötn (Iceland): (27 Mar) A small jökulhlaup (glacier outburst flood) started yesterday from the subglacial lake Grímsvötn and has been discharging into the river Gígjukvísl.
The event, which could have been triggered by normal fluctuations of hydrothermal activity under the ice is expected to be small. The Icelandic Met Office reports maximum discharge rates on the order of magnitude 1000 cubic meters per second, similar to rates during summer ice melt, and expects no damage to occur. The maximum of the flood is expected to be around the end of the week.
A small shallow earthquake swarm, probably as a result of adjustments in the ice mass above the draining lake, has accompanied the flood today. There are no indications that the flood was caused by a volcanic eruption of Grímsvötn volcano.

Hekla (Iceland): (27 Mar) The volcano remains restless, but without any indication of an impending eruption (however, it is notorious for not giving much warning either).
3 tiny earthquakes, all below magnitude 2, occurred today and add to the ongoing series of occasional small quakes under the volcano.
Current GPS and strain (volume changes of the bedrock, a strong indicator immediately prior to an eruption, while magma is pushing upwards) measurements show no significant variations.

Volcano Activity Summary for 28 Mar 2014:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Barren Island (Indian Ocean): intermittent activity, likely strombolian-type and/or lava flows (updated 4 Feb 2014)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 27 Mar 2014)
Colima (Western Mexico): extrusion of lava flow from summit, intermittent explosions (updated 20 Mar 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 27 Mar 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)
Etna (Sicily, Italy): lava flow from base of New SE crater, strombolian explosions / ash emissions from NSEC (updated 4 Feb 2014)
Fuego (Guatemala): frequent moderate to large strombolian explosions (updated 26 Mar 2014)
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 27 Mar 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 24 Mar 2014)
Kavachi (Solomon Islands): no eruption since 2007 (updated 2 Feb 2014)
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)
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): sporadic explosions (updated 27 Mar 2014)
Merapi (Central Java, Indonesia): sporadic phreatic explosions (updated 27 Mar 2014)
Nishino-shima (Volcano Islands): lava effusion enlarging the new island (updated 4 Mar 2014)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 26 Feb 2014)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): weak strombolian activity in summit crater (updated 10 Mar 2014)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 12 Aug 2013)
Reventador (Ecuador): continuous ash emissions, lava effusion at summit (updated 26 Mar 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 24 Mar 2014)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 18 Mar 2014)
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 26 Feb 2014)
Sinabung (Sumatra, Indonesia): effusion of viscous lava, steaming, ash emissions (updated 18 Mar 2014)
Slamet (Central Java): mild strombolian activity from summit crater (updated 26 Mar 2014)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 25 Jul 2013)
Suwanose-jima (Ryukyu Islands): strombolian to weak vulcanian explosions (updated 24 Feb 2014)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)

Eruption warning / minor activity:

Aso (Kyushu): occasional weak ash emissions (updated 20 Feb 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 20 Feb 2014)
Chirpoi (Kurile Islands, Russia): hot spot visible on satellite imagery (updated 12 Mar 2014)
Cleveland (Aleutian Islands, Alaska): occasional small explosions (updated 2 Mar 2014)
Copahue (Chile/Argentina): seismic unrest (updated 21 Mar 2014)
Dieng (Central Java): increased degassing (updated 28 Mar 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 25 Feb 2014)
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)
Kelud (East Java): steaming, activity at crater unknown (updated 2 Mar 2014)
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)
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, intense degassing (updated 20 Mar 2014)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 10 Mar 2014)
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)
San Cristobal (Nicaragua): seismic unrest, occasional phreatic explosions (updated 6 Feb 2014)
San Miguel (El Salvador): small explosions, seismic unrest, intense degassing (updated 10 Mar 2014)
Sangay (Ecuador): degassing (updated 24 May 2013)
Tungurahua (Ecuador): sporadic explosions (updated 8 Mar 2014)
Turrialba (Costa Rica): ash venting, strong degassing (updated 24 Jul 2013)
Ubinas (Peru): slowly growing lava dome, degassing, ash venting (updated 27 Mar 2014)
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)

Actualités précédentes
Etna's New SE crater this morning (Etna Trekking webcam on Schiena dell'Asino)
jeudi, mars 27, 2014
Etna (Sicily, Italy): During the night, the lava effusion and persistent mild explosive activity from the New SE crater ceased, after being nearly continuously active for over two months. ... [details]
Ash puff from a strombolian eruption at Slamet last weekend
mercredi, mars 26, 2014
Slamet (Central Java): Strombolian explosions of generally small size continue at irregular intervals. ... [details]
mardi, mars 25, 2014
Kilauea (Hawai'i): No major changes in eruption activity on Kilauea over the past week - lava lake at summit remains 45 m (148 ft) below the floor of Halema`uma`u crater. All surface flows on the east rift zone remain slow in progress, but continue to burn tree lines in the closed Kahauale`a reserve. ... [details]
An eruption from Fuego volcano this morning (INSIVUMEH)
lundi, mars 24, 2014
Karymsky (Kamchatka): A volcanic ash plume was see on satellite imagery this morning at 10,000 ft (3 km) altitude and extending SE of the volcano, VAAC Tokyo reported. ... [details]
Ash emission and plume of white vapour from the eruptive vents within the crater (Photo: Emanuela / VolcanoDiscovery Italia)
samedi, mars 22, 2014
Etna (Sicily, Italy): Mild strombolian activity is still continuing and ash emissions alternate with dense white vapour. ... [details]

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