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mercredi, janv. 23, 2013
Small volcanic quakes and weak tremor are visible at the seismogram, but within normal levels for this active volcano.
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jeudi, mars 22, 2012
Le tremblement de terre Mexicain de magnitude 7.4 près d'Acapulco ce mardi pourrait avoir affecté le volcan San Salvador actuellement en sommeil à la distance de 1000 km et avoir déclenché un essaim de tremblement de terre sous le volcan. ...
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San Salvador volcanstratovolcan 1893 m / 6,211 ft
El Salvador, 13.73°N / -89.29°W Condition actuelle: en sommeil (1 sur 5) San Salvador webcams / live data
Dernière mise à jour: 23 janv. 2013
Style éruptif tipique: effusive flank fissure eruptions Eruptions du volcan San Salvador: 1917, 1806 (?), 1671, 1658, 1572 ± 2, ?1200, 640 AD ± 30 years Derniers séismes proches:
Boqueron volcano is truncated by a steep-walled, 500 m deep and 1500 m wide summit crater, which formed during a large eruption about 800 years ago. Before the last eruption in 1917, the crater of Boqueron contained a 400 m wide lake, which was replaced by a small, 30 m high young cinder cone, called Boqueroncito, built during the eruption along with a major lava flow on the north flank. Most historical eruptions from San Salvador originated from flank vents. Introduction:The San Salvador or Quezaltepeque volcanic center formed in the southern part of the main graben of El Salvador and is dominantly andesitic. 3 fracture zones that extend beyond the base of San Salvador volcano have been the locus for numerous flank eruptions, including 2 that formed maars on the WNW and SE sides.Most of the 4 historical eruptions recorded since the 16th century have originated from flank vents, including two eruptions in the 17th century from the NW-flank cone of El Playón, during which explosions and a lava flow damaged inhabited areas. 1999 unrest
A small seismic swarm occurred in August 1999, when volcano-tectonic earthquakes about 5 km from the crater were detected. No other signs of unrest were noted. 1917 eruption
The last eruption of San Salvador volcano began on 6 June 1917 following strong and destructive earthquakes lasting for 2 hours. The eruption consisted of an effusive fissure eruption on the NW flank followed by a moderately explosive summit eruption (similar, but smaller in scale, to the Eyafjallajökull eruption in 2010). The effusive phase produced a large aa lava flow on the NW flank, left a row of cinder cones on the eruptive fissure, and lasted about a week. The second phase started simultaneously with the waning of the waning of the first phase from a fissure vent inside the summit crater. It quickly evaporated a former 400 m wide lake and built the small Boqueroncito cinder cone. ...plus |
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