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Volcanic activity world-wide 26-27 July 2012: strombolian activity at Etna, updates for Ambrym, Fuego, Santiaguito, Popocatéptel, Galeras, Nevado del Ruiz and other volcanoes

Fri, 27 Jul 2012, 10:24
10:24 AM | BY: T
No particularly unusual volcanic activity is taking place at the moment. Mainly based on the latest Smithsonian / USGS activity report, webcams and other sources, the following is a brief summary:

Ambrym (Vanuatu): The lava lakes on Ambrym are very active and a significant SO2 plume is usually seen drifting from the volcano by NOAA's satellite.

Cleveland (Aleutians, Alaska) has not had any significant activity recently, but shows steaming and a thermal anomaly from the summit crater lava dome.

Cumbal (Colombia): steaming, decreased seismic activity

Batu Tara (Sunda Islands, Indonesia): The remote Batu Tara volcano continues to produce sometimes several ash plumes per day. Most of them are rising to 7000 ft (2 km) as observed by satellite and reported by VAAC Darwin.

Etna (Italy): strombolian activity in Bocca Nuova continues at fluctuating levels.

Fuego volcano (Guatemala) produces frequent mild strombolian activity and several lava flows.

Galeras (Colombia) has had a few shallow earthquakes over the past week, and was showing strong degassing and frequent ash venting.

Ijen (East Java, Indonesia): The alert level of the volcano was raised from 2 to 3 (out of 4) on 24 July due to an increase in steaming and seismicity.

Karymski (Kamchatka)' activity has been low. There are no reports of explosions, only weak seismic activity and a persistant thermal anomaly at crater visible on satellite images.

Pacaya (Guatemala): During the past week, tremor at the volcano was low, but the volcano continues to produce a significant amount of SO2, and possibly ash venting.

Nevado del Ruiz (Colombia): There is some weak seismic activity above background at Pacaya, but no visible activity.

Popocatépetl (Mexico): Strong degassing and SO2 emission, occasional ash bursts and a constant lava glow from the summit area can be observed at Popocatépetl volcano near Mexico City.

Santiaguito / Santa Maria (Guatemala): The activity at Santiaguito has been decreasing in the past weeks. Ash explosions from the active lava dome are becoming less intense and frequent and INSIVUMEH reports that the blocky lava flows from the dome are currently calm.

Shiveluch (Kamchatka): During 13-21 July explosive activity at Shiveluch continued, but at lower intensity than during the previous months. A thermal anomaly on the lava dome is visible on satellite imagery.

Tongariro (New Zealand) remains seismically active, but less than before. There are no further news from GNS science, but the alert level remains at 1.
Previous news
Wed, 25 Jul 2012, 14:19
Volcanic activity worldwide in the past weeks has mostly featured the usual, semi-permanently active volcanoes. ... read all
Thu, 28 Jun 2012, 16:55
Live data viewed with our webcams.volcanodiscovery.com tool
The intense seismic swarm at El Hierro volcano continues with more than 100 quakes > M1.5 so far today. The quakes are concentrated underneath the El Julan coast, and some of the most recent quakes today have been at significantly shallower levels, 15-17 km, and indicate that magma now has started to rise. ... read all
Wed, 27 Jun 2012, 09:11
Location and depth map of the quakes beneath El Hierro during the past 36 hours. The red bullets ion the Las Calmas sea only started in the June 26 afternoon.
The most interesting volcano-related event at the moment is certainly the seismic crisis on El Hierro where the high-intensity earthquake swarm accompanied by tremor episodes continues. The quakes, still at "safe" 20 km depth, have now migrated to the El Julan coast where magma could be accumulating. ... read all
Tue, 26 Jun 2012, 06:27
A new eruption might be under way at El Hierro (Canary Islands, Spain). Following several weaker swarms in the past weeks, a strong swarm started late on 24 June and increased dramatically to more than 200 earthquakes of M1.5 or more, including volcanic tremor. The quakes locations indicated that magma was moving at depth from N towards the S in a similar way as at the start of the 2011 submarine eruption. Therefore, the possibility of renewed eruptive activity is real. ... read all

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