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Volcanic activity worldwide 24 Dec 2018: Etna volcano, Fuego, Popocatépetl, Krakatoa, Shiveluch, Re...

lundi déc. 24, 2018 21:00 |

Map of today's active volcanoes
Map of today's active volcanoes
Eruption of new lava flow from Etna this afternoon (image: LAVE webcam)
Eruption of new lava flow from Etna this afternoon (image: LAVE webcam)
Today's Aqua satellite image of Etna volcano
Today's Aqua satellite image of Etna volcano
Location of the magnitude 4 quake earlier today under Etna volcano
Location of the magnitude 4 quake earlier today under Etna volcano
View from Catania showing the ash plume from the ongoing eruption (image: Etna Tech webcam 1)
View from Catania showing the ash plume from the ongoing eruption (image: Etna Tech webcam 1)
Lava flow from eastern foot of New SE crater into Valle del Bove (INGV thermal webcam on Monte Cagliato, looking from the east towards the upper Valle del Bove))
Lava flow from eastern foot of New SE crater into Valle del Bove (INGV thermal webcam on Monte Cagliato, looking from the east towards the upper Valle del Bove))
Strombolian activity from Etna's New SE crater last night (image: Emanuela Carone / VolcanoDiscovery Italy)
Strombolian activity from Etna's New SE crater last night (image: Emanuela Carone / VolcanoDiscovery Italy)
The new lava flow at Etna (image: LAVE webcam)
The new lava flow at Etna (image: LAVE webcam)
Etna (Sicily, Italy): The following video shows the beginning of Etna volcano's new flank eruption, starting around noon on 24 Dec 2018: a series of quakes accompanies the progressive opening of several fractures, accompanied by strong ash emission, on and below the SE crater.
An eruptive fissure opens around 17:00 local time in the upper western headwall of the Valle del Bove, followed by a river of lava descending from there and quickly reaching the bottom of it:

...24 Dec:
The strong ash emissions can also be seen on satellite images - impressive!
...24 Dec:
Seismic activity at Etna is significant. The largest quake today so far has been a magnitude 4 quake at 2 km depth, at 13:09 local time, and widely felt around in the area.
It was most certainly associated with the opening of the new eruptive fissure below the SE crater.
...24 Dec:
The volcano decided to begin a subterminal flank eruption, i.e. effusion of lava from a flank vent connected to the upper conduits in the summit area.
Currently, a large lava flow is currently running into the upper Valle del Bove from a new fissure vent at the southeastern feet of the New SE crater, near the former Belvedere area.
... [read more]
...24 Dec:
From webcam imagery, a strong lava flow seems to be coming from a fracture on the eastern base of the New SE crater, headed into the Valle del Bove (where it poses no threat).
...24 Dec:
Something significant seems to be in progress at Etna:
Emanuela who's on location reported "crazy seismic activity" and that a new fracture has opened on the flank of the SE crater (SEC), presumably on its western flank between Voragine and the SEC.
...24 Dec:
Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: EXPLOSIVE ACTIVITY IS INCREASED OBS VA DTG:24/1200Z
...24 Dec:
[UPDATE]
A significant event is in progress at the volcano. Strong seismic activity, felt by people, has been accompanying the opening of several fractures in the summit area, most notably on the eastern and southern flanks of the New SE crater, which is emitting dense ash plumes.
... [read more]
...24 Dec:
Beginning of darkness makes it easier to see what is going on: a flank eruption in from the a new effusive vent in the upper western headwall of the Valle del Bove, SE of the SE crater.
The lava flow has already reached and is spreading in the Valle del Bove itself. For now, it does not pose any danger.

Shiveluch (Kamchatka): (24 Dec) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: POSS ERUPTION OBS AT 20181224/0210Z FL120 EXTD NE OBS VA DTG:24/0240Z

Sakurajima (Kyushu, Japan): (24 Dec) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20181224/0227Z OVER FL110 STNR OBS VA DTG:24/0220Z

Krakatoa (Sunda Strait, Indonesia): The triggering cause of Saturday's tsunami is still being discussed. A common and likely interpretation is a landslide, which could have been caused by either, or a combination of:
- a slide simply caused by the weight of rapidly accumulated new lava material on the flanks, both above and below water
... [read more]
...24 Dec:
A version with the start of the explosion filmed in Oct slowed down 10x where you can see how it breaks through the cone itself:

Something like this might have occurred on Saturday, leading to the partial collapse of the cone.

Popocatépetl (Central Mexico): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ONGOING VA EMS

Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ONGOING INTERMITTENT EMS.
...24 Dec:
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: OCNL EM

Reventador (Ecuador): (24 Dec) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: OCNL VA EM

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: INTERMITTENT EMISSIONS

Volcano Activity Summary for 24 Dec 2018:

Currently erupting:

Ambrym (Vanuatu): several lava lakes, currently flank eruption inside the caldera near Marum (updated 17 Dec 2018)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 28 Nov 2017)
Ebeko (Paramushir Island): intermittent ash eruptions (updated 7 Oct 2018)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Danakil depression, Ethiopia): active lava lake in the south crater of the summit caldera (updated 12 Oct 2018)
Etna (Sicily, Italy): subterminal flank eruption (updated 24 Dec 2018)
Fuego (Guatemala): lava flows on S and W flanks, lava fountaining from summit vent (updated 6 Jun 2018)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Jul 2018)
Krakatoa (Sunda Strait, Indonesia): Large portion of Anak Krakatau appears to have collapsed- apparent major eruption continues (updated 23 Dec 2018)
Masaya (Nicaragua): active lava lake ini summit crater (updated 12 Jul 2016)
Nevados de Chillán (Central Chile): sporadic mild to moderate ash emissions (updated 31 Oct 2018)
Nyiragongo (DRCongo): new vent on crater floor (updated 9 Sep 2016)
Pacaya (Guatemala): strombolian activity in summit crater, lava flow effusion (updated 29 Apr 2018)
Planchón-Peteroa (Central Chile and Argentina): Continuous mild ash emissions (updated 19 Dec 2018)
Popocatépetl (Central Mexico): intermittent explosions of varying size, ash emissions (updated 16 Dec 2018)
Reventador (Ecuador): lava flow on SW flank (updated 1 Dec 2017)
Sabancaya (Peru): frequent moderate explosions, intense ash emissions (updated 1 Dec 2017)
Sakurajima (Kyushu, Japan): Resumed explosions (updated 20 Dec 2018)
Santiaguito (Guatemala): intermittent strong explosions from growing Caliente dome (updated 9 May 2017)
Semeru (East Java, Indonesia): growing lava dome, mild strombolian activity in summit crater (updated 10 Oct 2016)
Stromboli (Eolian Islands, Italy): intense strombolian explosions, occasional lava overflows from vents (updated 24 Oct 2018)
Turrialba (Costa Rica): sporadic mild ash emissions (updated 13 Nov 2018)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 16 Dec 2017)

Eruption warning / minor activity:

Bagana (Bougainville Island, Papua New Guinea): intermittent mild ash emissions (updated 8 Dec 2018)
Barren Island (Indian Ocean): strombolian activity, lava flow effusion on northern flank (updated 16 Dec 2018)
Cleveland (Aleutian Islands, Alaska): 80 m diameter circular lava flow observed in summit crater, low seismic unrest (updated 13 Dec 2018)
Kadovar (Northeast of New Guinea): continuous explosions, lava flow emission from fissure vent (updated 18 Nov 2018)
Karangetang (Siau Island, Sangihe Islands, Indonesia): Significant increase in activity; alert level raised (updated 22 Dec 2018)
Kuchinoerabu-jima (Ryukyu Islands): Minor eruption (updated 23 Oct 2018)
Langila (New Britain, Papua New Guinea): likely lava flows or lava dome extrusion, strombolian activity (updated 25 Nov 2018)
Manam (Papua New Guinea): Very strong explosive eruption (updated 16 Dec 2018)
Mayon (Luzon Island, Philippines): intermittent small explosions, degassing (updated 15 Nov 2018)
Merapi (Central Java, Indonesia): intermittent phreatic explosions (updated 1 Jun 2018)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the pit crater in the northern main crater (updated 16 Dec 2018)
Sangeang Api (Indonesia): New small ash emissions (updated 15 Oct 2018)
Shiveluch (Kamchatka): growing lava dome (updated 20 Nov 2018)
Soputan (North Sulawesi, Indonesia): Volcano slowly calming down (updated 19 Dec 2018)
Veniaminof (Alaska Peninsula, USA): Eruption eases, color code back to orange (updated 20 Dec 2018)

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