Fuego volcano (Guatemala): increasing lava emission with pyroclastic flows

lun., 2 sept. 2013, 16:24
16:24 PM | AUTEUR : T
Pyroclastic flows in the Ceniza canyon this morning (INSIVUMEH)
Pyroclastic flows in the Ceniza canyon this morning (INSIVUMEH)
Seismic signal from Fuego last night showing tremor pulses (FG3 station, INSIVUMEH)
Seismic signal from Fuego last night showing tremor pulses (FG3 station, INSIVUMEH)
A phase of increased lava flow activity occurred this morning from about 6 am local time, generating a series of pyroclastic flows that descended several ravines on different, but mostly the southwestern side of the volcano.
The volcano has been in moderate effusive activity for at least the past two weeks, feeding relatively small lava flows on the upper steep slope. A sudden increase in effusion rate seems to have caused the destabilization of the lava flows, generating rockfalls that turned into pyroclastic flows. The lava flows have quickly increased from previously 200 m to about 2 km length. The surge of magma supply is also suggested by the appearance of strong tremor pulses the previous night.
In the meanwhile, explosive (strombolian) activity from the summit vent has remained weak.
An ash plume rising as a by-product of the pyroclastic flows was reported to about 12,000 ft (3.6 km) altitude.

Actualités précédentes

ven., 30 août 2013, 09:15
The lava flows were no longer active yesterday morning. Activity consisted in weak to moderate strombolian explosions with incandescent material projected to up to 150 m above the crater, and ash plumes of a few 100 m height. ... Read all
mer., 28 août 2013, 06:00
INSIVUMEH reported that during 28-31 August explosions from Fuego generated ash plumes that rose 450-550 m and drifted 8-10 km W and NW. During 28-29 August incandescent material was ejected 150 m high, and white plumes rose 350 m and drifted NW. During 30-31 August rumbling was heard 15 km away. ... Read all
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