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Volcanic activity worldwide 14 Nov 2014: Santiaguito volcano, Pacaya, Fuego, Ibu, Pavlof, Monowai, S...

vendredi nov. 14, 2014 21:00 |

Strombolian eruption from a vent in the center of Ibu's lava dome
Strombolian eruption from a vent in the center of Ibu's lava dome
Pumice raft observed on 31 Oct near Monovai seamount (RNZAF via GeoNet)
Pumice raft observed on 31 Oct near Monovai seamount (RNZAF via GeoNet)
Lava fountains from the new eruption at Pavlof volcano (image: AVO)
Lava fountains from the new eruption at Pavlof volcano (image: AVO)
Eruption at Santiaguito yesterday (INSIVUMEH)
Eruption at Santiaguito yesterday (INSIVUMEH)
Current seismic signal (PCG station, INSIVUMEH)
Current seismic signal (PCG station, INSIVUMEH)
Ash plume from an explosion at Fuego on 12 Nov (INSIVUMEH webcam)
Ash plume from an explosion at Fuego on 12 Nov (INSIVUMEH webcam)
Stromboli (Eolian Islands, Italy): (14 Nov) Occasional mild strombolian explosions occur from the summit vents. Very weak lava effusion also continues, at least intermittently from the vent at 650 m elevation. (Source: INGV Catania latest report)

Ontake-san (Honshu): (14 Nov) JMA reported that cloud cover often prevented visual observations of Ontakesan during 5-11 November; white plumes rose 200-300 m above the crater rim and drifted NE, E, and SE.
The Alert Level remained at 3 (on a scale of 1-5).

Suwanose-jima (Ryukyu Islands): (14 Nov) Tokyo VAAC reported a small eruption this morning, producing an ash plume to 6,000 ft (1.8 km) altitude.
At least intermittently, the volcano continues to produce strombolian explosions of varying intensity.

Mayon (Luzon Island): (14 Nov) During 5-11 November white plumes rose from Mayon's crater and drifted S, SW, WSW, WNW, and NW, sometimes downslope. Weak incandescence from the crater was noted some nights.
As many as five volcanic earthquakes were recorded per day. The Alert Level remained at 3 (on a 0-5 scale). (Smithsonian / USGS Weekly Volcanic Activity Report 5-11 November 2014)

Ibu (Halmahera, Indonesia): (14 Nov) When observed during 12-13 Nov, there was frequent mild to moderate explosive activity from at two different vents in the center of the lava dome.
No activity was observed at the lava dome itself. The vent to the south is surrounded by a recent-looking cinder cone, about 30 m tall and 60 m wide, and produced likely phreatomagmatic explosions at intervals of 20-30 mintues. These typically seemed to start from a cluster of vents inside the cone's crater, ejecting dense white steam as well as gray ash plumes, sometimes followed by dense black tephra jets reaching 10-20 m in height. Sometimes, the ash plumes collapsed to form small pyroclastic flows running down the western slope of the cone. At night, weak incandescence could be seen and only few glowing blombs were ejected during these eruptions.
... [read more]

Monowai (Kermandec Islands, New Zealand): (14 Nov) New Zealand scientists concluded that most likely 3 underwater eruptions occurred during this October at the shallow submarine volcano, one of the most active ones in the Tonga-Kermadec arc.
This conclusion was based on both the observation of a pumice raft in the area on 31 Oct and the analysis of so-called T-waves, a particular kind of acoustic waves that propagate well in the ocean and have been found to be typically associated with submarine eruptions from Monovai seamount.
... [read more]

Pavlof (Alaska Peninsula, USA): (14 Nov) A new eruption began at the volcano on 12 Nov afternoon about 3:00 pm AKST (00:00 UTC on 13 November). The eruption comes from a vent at the upper northern flank just below the summit and has been characterized by ash emissions to about 9000 feet (2.7 km), lava fountaining and avalanches of rock debris and ash descending the north flank of the volcano.
Minor ash emissions were visible in the FAA-operated web camera in Cold Bay beginning around 4:50 pm AKST yesterday (1:50 UTC on 13 November). Observations from ground observers in Cold Bay coincided with a subtle but distinct increase in seismic activity, and the appearance of a thermal signal at the summit of Pavlof evident in satellite images at 5:40 pm AKST (02:40 UTC 13 November).
Since these initial reports of activity, seismic activity has continued to increase gradually and the thermal signal at the summit remains evident in satellite data. Cloud cover has obscured the volcano and no new observations on ash emissions are available. However, the level of seismicity suggests that ash emission continues. (AVO)

Santiaguito (Guatemala): (14 Nov) Both explosive and effusive activity continue from the Caliente lava dome.
The observatory reports weak ash explosions ejecting plumes that rise approx. 500 m. The length of the viscous lava flow to the SE is now more than 3.3 km long and has two active fronts, one inside the Nima1 river bed, the other outside its banks.

Pacaya (Guatemala): (14 Nov) It seems new strombolian explosive activity has started around 10-11 November from the Mackenney crater.
INSIVUMEH reported in its special bulletin that an increase in gas emissions as well as fine ash expulsions have been observed. Together, they form plumes reaching 3000 m altitude and drifting SW for approx. 7 km.
The seismic signal shows elevated activity as well. This could be the beginning of a new episode of strombolian activity, which in turn would slowly start building a new cone inside the Mackenney crater.

Fuego (Guatemala): (14 Nov) Explosive activity from the volcano has slowly been increasing over the past 1-2 weeks. Eruptions of moderate size with ash plumes up to more than 1000 m height have become more frequent.
Shock waves could be felt in up to 20 km distance and rattled windows and roofs of houses in villages around the volcano.

Reventador (Ecuador): (14 Nov) IG reported moderate volcanic activity including explosions, long-period earthquakes, harmonic tremor, and tremor at Reventador during 5-11 November.
On 11 November steam plumes with a minor ash content rose 1 km and drifted NW. Cloudy conditions frequently obscured views of the summit. (Smithsonian / USGS Weekly Volcanic Activity Report 5-11 November 2014)

Volcano Activity Summary for 14 Nov 2014:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Bagana (Bougainville Island, Papua New Guinea): ash emissions, lava dome growth (updated 10 Nov 2014)
Bardarbunga (Iceland): Ongoing lava fountain from Baugur crater, subsidence of Bárðarbunga caldera and seismic activity (updated 18 Sep 2014)
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 4 Nov 2014)
Colima (Western Mexico): new lava flow on SW flank (updated 21 Sep 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 10 Nov 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 from summit crater, intermittent lava flows (updated 14 Nov 2014)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 14 Nov 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Oct 2014)
Kilauea (Hawai'i): new lava flow from vents on NE flank of Pu'u 'O'o (updated 13 Aug 2013)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 28 Aug 2013)
Marapi (Western Sumatra, Indonesia): sporadic explosions (updated 27 Mar 2014)
Nasu (Honshu)
Nishino-shima (Volcano Islands, Japan): growing island (updated 11 Oct 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)
Pavlof (Alaska Peninsula, USA): lava fountains, ash emission from new vent on upper north flank (updated 14 Nov 2014)
Poas (Costa Rica): phreatic explosions (updated 14 Oct 2014)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): lava fountains, ash emissions from Tavurvur cone (updated 12 Sep 2014)
Reventador (Ecuador): ash emissions, explosions (updated 14 Nov 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 5 Nov 2014)
Sangeang Api (Indonesia): growing lava dome & lava flow (updated 7 Jul 2014)
Santiaguito (Guatemala): generation of hot lahars (updated 14 Nov 2014)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 21 Sep 2014)
Shishaldin (United States, Aleutian Islands): mild explosive activity, intermittent more intense phases (updated 31 Oct 2014)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 30 Oct 2014)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 6 Nov 2014)
Slamet (Central Java): intense strombolian explosions (updated 13 Sep 2014)
Stromboli (Eolian Islands, Italy): degassing from summit craters, ending lava effusion from 650 m vent (updated 14 Nov 2014)
Suwanose-jima (Ryukyu Islands): strombolian activity in summit crater (updated 14 Nov 2014)
Tungurahua (Ecuador): moderate to strong strombolian explosions from central crater (updated 25 Sep 2014)
Turrialba (Costa Rica): Ongoing ash emission and explosions (updated 30 Oct 2014)
Ubinas (Peru): degassing, sporadic small explosions and ash venting (updated 11 Sep 2014)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)
Zhupanovsky (Kamchatka, Russia): degassing, last eruption ended mid Oct 2014 (updated 10 Nov 2014)

Eruption warning / minor activity:

Aso (Kyushu): occasional weak ash emissions (updated 31 Aug 2014)
Augustine (Cook Inlet (SW Alaska))
Bezymianny (Central Kamchatka Depression): steaming, weak seismic activity (updated 3 Jul 2014)
Cerro Negro de Mayasquer (Colombia): seismic unrest, inflation (updated 22 Oct 2014)
Chirpoi (Kurile Islands, Russia): hot spot visible on satellite imagery (updated 24 Oct 2014)
Copahue (Chile/Argentina): degassing, crater glow, occasional ash emissions (updated 5 Nov 2014)
Etna (Sicily, Italy): sporadic weak ash emissions from New SE crater (updated 19 Apr 2014)
Heard (Australia, Southern Indian Ocean): possibly lava lake in summit crater (updated 27 May 2014)
Karangetang (Siau Island, Sangihe Islands, Indonesia): incandescent lava dome (updated 24 Oct 2014)
Kavachi (Solomon Islands): no eruption since 2007 (updated 16 Jun 2014)
Kerinci (Sumatra): seismic unrest (updated 5 Jun 2013)
Kirishima (Kyushu): degassing, alert lowered (updated 25 Oct 2014)
Krakatau (Sunda Strait, Indonesia): degassing (updated 31 Mar 2014)
Kuchinoerabu-jima (Ryukyu Islands): explosion on 3 Aug 2014 (updated 21 Aug 2014)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 13 Sep 2014)
Mayon (Luzon Island): extrusion of viscous lava flow, warning of possible explosive eruption (updated 14 Nov 2014)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Monowai (Kermandec Islands, New Zealand): frequent submarine eruptions, last confirmed during Oct 2014 (updated 14 Nov 2014)
Nyamuragira (DRCongo): lava lake in summit crater (updated 4 Aug 2014)
Ontake-san (Honshu): strong phreatic (?) explosion on 27 Sep 2014 (updated 14 Nov 2014)
Pacaya (Guatemala): weak strombolian activity (updated 14 Nov 2014)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Piton de la Fournaise (La Réunion): short-lived eruption during 21-22 June (updated 5 Nov 2014)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 6 Nov 2014)
Rasshua (Central Kuriles)
Raung (East Java): strombolian activity in summit crater (updated 5 Aug 2013)
Rincón de la Vieja (Costa Rica): phreatic explosions from crater lake (updated 21 Sep 2014)
Sabancaya (Peru): Sabancaya volcano (Peru): phreatic eruption on 25 August (updated 10 Nov 2014)
Sacabaya (Northern Chile, Bolivia and Argentina)
San Cristobal (Nicaragua): possible ash emission on 11 April (updated 12 Apr 2014)
San Miguel (El Salvador): ash emissions, small explosions, increasing tremor (updated 2 Sep 2014)
Sangay (Ecuador): degassing (updated 24 May 2013)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 5 Aug 2013)

Actualités précédentes
USGS-HVO photo of active lava flow areas on November 12, 2014.
jeudi, nov. 13, 2014
Kilauea (Hawai'i): An upper branch of the active lava flow has advanced roughly 375m/400yds over the past 2-3 days to within 300m/325yds of Apaʻa Street, on the other side of the recycling & waste transfer station. ... [details]
Lava flows across the fence at Pahoa transfer staion on November 10, 2014.
mercredi, nov. 12, 2014
Kilauea (Hawai'i): Yesterday, lava flowed across the fence at the Pahoa transfer staion, a recycling and waste facility at the edge of town and across the street from the first residence which burned the day before. USGS-HVO reports that lava is currently filling the low area around the center of the facility, which had already been largely dismantled and relocated. ... [details]
County of Hawaii media image of burning house on November 10, 2014 on the outskirts of Pahoa village.
mardi, nov. 11, 2014
Bagana (Bougainville Island, Papua New Guinea): (10 Nov) Eruptive activity at the volcano continues. Several ash plumes were observed on satellite imagery during the past days, indicating continuing explosions. ... [details]

lundi, nov. 10, 2014
Zhupanovsky (Kamchatka, Russia): A new phase of eruptions started on 8 Nov. An initial explosion at 21:55 (UTC) on 7 Nov produced an ash plume that rose to approx. 10 km altitude and drifted SE. ... [details]
The latest map showing the extent of the lava flow as estimated from radar images. The lava now covers 69,9 km²  (69,5 km² + 0,4 km²). Analysis by the Institute of Earth Sciences (IES).
dimanche, nov. 09, 2014
Bardarbunga (Iceland): The volcanic eruption at Holuhraun gives no signs of weakening and continues to eject an impressive lava fountain from the central Baugur crater at a rate similar to the past few weeks. This record-breaking eruption started on the 31st of August 2014 and formed a more than 17 km long lava flow. Using the successive outlines of this lava flow as drawn on a radar image from the Icelandic Coast Guard, researchers from the Institute of Earth Sciences estimated that by now the lava has covered an area of 70 km². ... [details]

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