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Volcanic activity worldwide 26 Nov 2013: Merapi, Santa María / Santiaguito, Pacaya, Fuego, Popocat

Tuesday Nov 26, 2013 17:57 PM |

Glow from Etna's New SE crater last evening
Glow from Etna's New SE crater last evening
Small ash emission from Popocatépetl this morning
Small ash emission from Popocatépetl this morning
Santiaguito volcano this morning (INSIVUMEH)
Santiaguito volcano this morning (INSIVUMEH)
Comparison google earth image and Landsat satellite image from 24 Nov, where the new island can be seen (Blog Culture Volcan)
Comparison google earth image and Landsat satellite image from 24 Nov, where the new island can be seen (Blog Culture Volcan)
Etna (Sicily, Italy): No changes in activity have occurred since yesterday. Very occasionally, glow from the summit vent at the NSEC and from a vent at its southern base is visible, suggesting ongoing sporadic deep-seated explosions inside the cone. Tremor is low at the moment.

Ulawun (New Britain, Papua New Guinea): Activity continues. Darwin VAAC reported a small gas and perhaps ash plume at 12,000 ft (3.6 km) altitude this morning.

Sinabung (Sumatra, Indonesia): Ash emissions and explosions continue. So far, about 18,000 people have been evacuated from the most endangered zones in a radius of 5 km around the volcano.

Merapi (Central Java): Particular vigilance should be maintained to monitor the volcano. A large crack, about 230 m long and 50 m wide, has appeared in the lava dome that had been emplaced in the summit crater at the end of the 2010 eruption. It increases the current risk of sudden collapse of the dome, resulting in rock avalanches and dangerous pyroclastic flows. Even a smaller phreatic explosion than the one from 18 Nov could trigger this.

Popocatépetl (Central Mexico): No significant changes in activity have occurred. Only 8 weak emissions / explosions were recorded by CENAPRED during the latest 24 hr observation interval. The attached picture shows the largest of these events.

Santa María / Santiaguito (Guatemala): The INSIVUMEH observatory reports weak to moderate explosions with ash plumes up to 700 m height and constant block avalanches from the rims of the Caliente lava dome, sign that effusive activity has increased somewhat.

Pacaya (Guatemala): Strombolian activity continues, but has been weak over the past days.

Fuego (Guatemala): The lava flow on the upper southern slope was no longer active this morning (while it was still 100 m long yesterday). The volcano is back to its typical mild explosive activity from the summit crater with strombolian bursts generating ash plumes up to about 600 m high, sometimes accompanied by loud shock waves.

Jebel Zubair (Red Sea): Satellite images show signs of ongoing activity (steam plume, discolored water) at the new island at least until 20 November. A satellite image from 24 November shows no such signs any more, suggesting that the activity has stopped or paused.
Previous news
Glow from Etna's New SE crater this morning
Monday, Nov 25, 2013
Etna (Sicily, Italy): The New SE crater is restless. Occasional glow from the summit vent suggest that deep-seated strombolian activity continues. At the same time when this activity was visible, a glowing spot at the southern base was present as well. This could be a small effusive vent that is activated briefly during phases the magma column rises high enough inside the conduit. ... [more]
Explosion from Sakurajima this morning (Tarumizu MBC webcam)
Sunday, Nov 24, 2013
Sakurajima (Kyushu, Japan): After a short phase of weaker activity, the volcano began to erupt more violently yesterday with a series of powerful explosions that sent ash plumes up to 15,000 ft (4,5 km). Near-constant ash emissions have been taking place from the Showa crater. ... [more]
Eruption of Etna this morning (Etna Trekking webcam image)
Saturday, Nov 23, 2013
Etna (Sicily, Italy): The latest paroxysm (nr 17 in 2013) at the New SE crater of Mt Etna occurred this morning, just less than one week after the previous one last weekend. ... [more]
New SE crater of Etna this evening
Friday, Nov 22, 2013
Etna (Sicily, Italy): The New SE crater is not completely quiet: there are small strombolian explosions, sometimes with lava ejections and sometimes only indicated by occasional weak glow from both the summit vent. In addition, at the same time increased glow is visible at the effusive vent on the east side of the cone. The latter has shown a similar behavior for the past two weeks before and after the main phases of the eruption. It seems to become active whenever the internal pressure in the conduit increases during explosions, and reacts by squeezing out small amounts of lava. ... [more]
SO2 plume from Langila on 22 Nov (NOAA)
Friday, Nov 22, 2013
Chirpoi (Kurile Islands, Russia): SVERT reported that a thermal anomaly from Snow, a volcano of Chirpoi, was detected in satellite images during 13-15 November. The Aviation Color Code remained at Yellow. ... [more]

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