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Volcanic activity worldwide 30 Mar 2013: Stromboli, Colima, Batu Tara, Sakurajima, Paluweh, Grozny, ...

Samstag Mär 30, 2013 20:04 |

Small lava overflow from the NE crater of Stromboli (thermal webcam, INGV Catania)
Small lava overflow from the NE crater of Stromboli (thermal webcam, INGV Catania)
Etna today (the dark patch above the New SE crater is a camera artifact, probably a dirty spot on the lens).
Etna today (the dark patch above the New SE crater is a camera artifact, probably a dirty spot on the lens).
Location of recent quakes at EL Hierro (IGN)
Location of recent quakes at EL Hierro (IGN)
Current seismic recording from Colima volcano (Soma station, Univ. Colima)
Stromboli (Eolian Islands, Italy): Activity remains elevated. A small lava overflow has started from the NE crater, accompanied by relatively strong tremor and explosion signals visible on the seismic signal.

Etna (Sicily, Italy): A visit to the summit area and current tremor levels showed the volcano is currently calm. No explosive activity was heard or seen from any of the summit craters.
The area of bomb impacts from the last New SE crater paroxysm on 16 March was impressive - the whole area between Torre del Filosofo, the 2002-03 craters and the area of Cisternazza NE of the Cono del Lago was littered with bombs of various sizes (20-50 cm mostly). The Belvedere was found totally covered with scoria and bombs.

El Hierro (Canary Islands, Spain): The situation to the west of the island had not changed much and the islanders are in for an uneasy Easter weekend: the seismic swarm continues with frequent and increasingly strong earthquakes and tremor pulses. 15 quakes with magnitudes between 4-4.7 were recorded yesterday alone, the total number of quakes is in the hundreds.
A further migration of the hypocenters to the south can be seen, and most quakes remain in the 18-20 km depth layer, with a few in the upper layer at about 10-12 km depth. Infation has slowed down a bit, but reaches now 12 cm in the western part of the island itself.
... [read more]

Grozny (Iturup Island): Tokyo VAAC reported a possible eruption occurred yesterday around 11:00 GMT. A volcanic ash plume was observed at 7,000 ft (2.1 km) altitude and drifting eastwards.

Sakurajima (Kyushu, Japan): The frequency of explosions has been comparably low, with 0-2 events recorded per day. Yesterday and today, two stronger ones occurred that produced ash plumes rising up to 10,000 ft (3 km) altitude.

Batu Tara (Sunda Islands, Indonesia): An ash plume rose to an altitude of 10,000 ft (3 km) earlier today, sign that sometimes strong explosions continue from the volcano, in permanent eruption for more than 6 years now.

Paluweh (off Flores Island, Indonesia): The lava dome remains very active and produces ash plumes (by a mix of effusive-explosive activity comprising ash venting, explosions, rockfalls and pyroclastic flows from the dome) on a daily basis. The height of the plumes varies mostly between 8-12,000 ft (2.4-3.6 km) altitude.

Colima (Western Mexico): The "Volcano of Fire" has become a tourist attraction with now up to 200 weak to moderate explosions per day, and frequent incandescent rockfalls / small pyroclastic flows that descend the flank of the volcano to a length of up to 1.5 km and are a spectacular view at night.
Melchor Ursua Quiroz, director of the State's Civil Protection unit, said that the Fuego de Colima volcano is currently the most active of the country, and has recently increased its explosive activity. In an article in the El Universal newspaper, he "rules out" any risk for the population. A 8 km exclusion zone is in place around the volcano and the governments of Colima and Jalisco are on permanent alert.
Vorherige Nachrichten
Location of this morning's M4.6 earthquake (IGN)
Freitag, Mär 29, 2013
El Hierro (Canary Islands, Spain): Another large quake of magnitude 4.6, which was widely felt on the island, just occurred at 08:14 GMT at 18 km depth about 10 km west of the island under the seabed. ... [mehr]
Diffuse CO2 emission for El Hierro (INVOLCAN)
Donnerstag, Mär 28, 2013
El Hierro (Canary Islands, Spain): The latest CO2 measurements show a significantly higher than normal level of gas emission, consistent with fresh magma arriving from deeper sources. ... [mehr]
Today's seismic signal from Stromboli (ST8 station, INGV)
Mittwoch, Mär 27, 2013
Stromboli (Eolian Islands, Italy): It seems that activity has shifted a bit from effusive to explosive. The tremor signal has shown an increase today and includes very powerful explosion signals. On the other hand, lava overflows from the NE vent have decreased during the past days. ... [mehr]
Depth vs time of today's quakes under El Hierro
Dienstag, Mär 26, 2013
Hekla (Iceland): The Icelandic Meteorological Office has informed authorities about unusual seismicity at Hekla volcano, which could be a precursor to a new eruption, and increased the volcanic alert level to yellow. Monitoring of the volcano will be intensified, as Hekla is not only one of the most active, but also one of the potentially most hazardous volcanoes of the country. The last eruption was in March 2000. On average, the volcano has been erupting about every 10 years, and it would statistically seen be due for a new one. ... [mehr]

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