Volcanic activity worldwide 8 Jun 2013: Popocatépetl, Pavlov, San Cristobal, Cerro Negro
Samstag Jun 08, 2013 16:01 |
Seismic recording from San Cristobal volcano yesterday (CRIN station, INETER)
Pavlov (Alaska Peninsula, USA): Weak eruptive activity continues, producing small steam and ash plumes drifting at about 18-20,000 ft (5-6 km) altitude SSE as detected on satellite data (VAAC Anchorage).
Seismic recording on 4 June (CNGN station, INETER)
Popocatépetl (Central Mexico): Given the currently low activity (1-3 weak steam and gas emissions per hour), CENAPRED has lowered the alert level back to "Yellow Phase 2".
San Cristobal (Nicaragua): New eruptions occurred yesterday. The volcano produced a series of 7 small ash emissions between 06:45 to 11:43 am (local time). The explosions were very small and ash plumes only rose up to about 100 m above the crater.
The new eruptions were followed by a rise in seismic activity in the form of tremor, which rose to about 3 times normal levels during the afternoon. The tremor pulse was still of relatively low energy and in itself not alarming, as the volcano experiences similar phases of elevated seismicity frequently, but given the recent activity, INETER warns that new explosions, possibly larger in scale, could follow with little warning and that air traffic should avoid the area of the volcano.
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Cerro Negro (Nicaragua): The volcano might be entering a phase of reawakening. A seismic swarm of 49 low magnitude earthquakes and a pulse of volcanic tremor occurred on 4 June, INETER reported in a press release that day.
The seismic activity started 08:45 am (local time) on 4 June, increased until 10:30 and the eased again. At the moment, the seismicity is calm again. No further reports have been published by INETER, who has not raised the alert level, but recommended to limit access to the volcano's crater as a precaution measure.
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Stromboli (Eolian Islands, Italy): When observed during 3-6 June, the volcano was at normal levels of activity which had not changed significantly since our last visit 2 weeks ago. On the crater terrace, about 7 active vents were present, with eruptions every about 15-20 minutes: the two vents in the NW crater sometimes erupted simultaneously, one with low ejections of blocks, scoria and ash, the other with loud turbine-like jets of gas and lava fragments that often reached about 250 m height. The hornito at the NW crater rim was not seen erupting. ... [mehr]
Mittwoch, Jun 05, 2013
Tolbachik (Kamchatka): Activity continues with little changes, although the slow trend of decreasing seismic activity persists. A small lava lake 20 m across and weak strombolian activity were recently observed by Russian volcanologists who visited the site. Lava flows continue to be alimented and spread mainly to the SE. ... [mehr]
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