Santiaguito volcano with lava flows and pyroclastic flows
lundi juil. 30, 2012 17:33 | AUTEUR : T
The block lava flows from the lava dome have a length of about 3 km in different directions, mainly in the southwest, south and southwest flanks. The fronts and steep sides of the flows generate many avalanches of blocks, which along with regular explosions from the dome cause strong seismic signals.
Starting early on 29 July (local time), some of the block avalanches turned into weak pyroclastic flows, and generated thick colums of fine ash rising up to 1500 meters above the crater and moving southwest towards the San Marcos and El Rosario Palajunoj regions at an approximate distance 15 kilometers.
vendredi, juil. 27, 2012
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. ... [details]
mercredi, juin 27, 2012
A moderate explosion occurred at 05:47 26 June producing a 600 m tall ash column drifting SE, and causing ash fall in the areas of Finca San José and Finca La Quina. Weak avalanches descended from the SE side of the dome and the lava flow front on its SW side. After 21:00 at night, a small lahar descended into the Nimá I river. [details]
mercredi, juin 13, 2012
Based on seismic data and visual observations, INSIVUMEH reported that on 6 June a lahar traveled down Santa María's Rio Nima I drainage. During 6-7 and 10-12 June explosions from Santiaguito lava-dome complex produced ash plumes that rose 400-800 m above the crater and drifted SW. Lava flows produced block avalanches. [details]
vendredi, juin 01, 2012
During 22-23 and 28-29 May explosions from Santa María's Santiaguito lava-dome complex produced ash plumes that rose 400-900 m above Caliente dome and drifted E, SE, and S. ... [details]
jeudi, mai 24, 2012
INSIVUMEH reported that on 21 May a lahar traveled down Santa María's Rio Nima II drainage, carrying tree branches and 40-cm-wide lava blocks. ... [details]
Cliquez ici pour recommander cette page à un ami