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Volcanic activity worldwide 29 Dec 2018: Fuego volcano, Krakatoa, Merapi, Shiveluch, Dukono, Reventa...

Saturday Dec 29, 2018 21:00 PM |

Map of today's active volcanoes
Map of today's active volcanoes
Satellite image of Sakurajima volcano on 28 Dec 2018
Satellite image of Sakurajima volcano on 28 Dec 2018
Glowing rockfalls from Merapi seen last night (image: Galih Jati / VolcanoDiscovery)
Glowing rockfalls from Merapi seen last night (image: Galih Jati / VolcanoDiscovery)
Satellite image of Dukono volcano on 29 Dec 2018
Satellite image of Dukono volcano on 29 Dec 2018
Krakatoa seen yesterday from the coast - Anak Krakatau is no longer visible, only small ash and steam plumes rising from behind Sertung (image: VSI webcam)
Krakatoa seen yesterday from the coast - Anak Krakatau is no longer visible, only small ash and steam plumes rising from behind Sertung (image: VSI webcam)
Seismic signal from Cleveland volcano showing the small eruption this morning (image: AVO)
Seismic signal from Cleveland volcano showing the small eruption this morning (image: AVO)
Satellite image of Fuego volcano on 28 Dec 2018
Satellite image of Fuego volcano on 28 Dec 2018
Shiveluch (Kamchatka): (28 Dec) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20181228/1711Z FL310 REPORTED OBS VA DTG:28/2120Z

Sakurajima (Kyushu, Japan): (28 Dec) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20181228/2149Z FL060 EXTD S OBS VA DTG:28/2140Z

Merapi (Central Java, Indonesia): The volcano continues to erupt slowly, gradually filling the summit crater with a growing lava dome. Incandescent rockfalls occur from the sides of the dome, but so far these have been confined to the crater.
However, the situation is slowly (but almost surely) becoming more dangerous: As the dome grows, the risk of larger, sudden explosions increases, as well as the risk that the dome over-spills or breaches the crater rim. In that case, its activity will directly threaten the densely inhabited areas downslope, as pieces breaking off the lava dome can easily turn into glowing avalanches (pyroclastic flows) that can travel many kilometers and devastate everything in their path.
... [read more]

Dukono (Halmahera): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA ERUPTION TO FL070 EXT E OBS VA DTG:29/1050Z
...28 Dec:
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA ERUPTION TO FL070 OBS VA DTG:28/2250Z

Krakatoa (Sunda Strait, Indonesia): The activity at the volcano continues at reduced rate. Steam explosions have been more intermittent and smaller during the past 2 days, generating plumes that rose a few hundred meters only.
This trend corresponds to the seismic signals showing a marked decrease since the surge of supply of magma that led to the paroxysm during 21-22 Dec, which accumulated lots of new lava. This in turn might have been "the last straw that breaks the camel's back", i.e. the additional sudden weight on the slopes and/or the shaking induced by the continuous explosions could might have been the final trigger for the landslide to occur.
... [read more]

Cleveland (Aleutian Islands, Alaska): A small and short-lived explosive eruption occurred earlier today. The Alaska Volcano Observatory (AVO) detected it on seismic data to have been at at 3:17 UTC December 29 (18:17 AKST December 28) and a pilot reported seeing an ash cloud to 17,000 ft asl. Local winds are from the west.

"Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible.

"Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data." (AVO)
...29 Dec:
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: SHORT DURATION ERUPTIVE EVENT AROUND 29/0317Z

Fuego (Guatemala): (28 Dec) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: LGT VA EMS NEAR SUMMIT

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

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: SPORADIC PUFFS OF VA
...29 Dec:
Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: CONTINUOUS EMISSION
Previous news
Map of today's active volcanoes
Thursday, Dec 27, 2018
Etna (Sicily, Italy): The decreasing trend in surface and earthquake activity on and around Etna continues and there is little to nothing left of the vigorous flank eruption that had started on Christmas Eve (24 Dec 2018). However, the volcano is far from quiet and there are indications that more and potentially more dangerous activity could be in the making. ... [more]
Map of today's active volcanoes
Wednesday, Dec 26, 2018
Stromboli (Eolian Islands, Italy): Following an increase in activity detected at the volcano, Italian Civil Protection raised the alert level from "green" to "yellow", pointing out that the volcano is in "an unstable situation" and should be monitored more closely. ... [more]
Map of today's active volcanoes
Tuesday, Dec 25, 2018
Etna (Sicily, Italy): Bad weather has mostly prevented clear sights of the new flank eruption today, but it seems that while it is still going on, lava emission from the new fissure vent high in the Valle del Bove that opened yesterday has decreased. ... [more]
Map of today's active volcanoes
Monday, Dec 24, 2018
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. ... [more]

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