Fuego volcano (Guatemala): change in eruptive style: large lava flows
Friday Sep 14, 2012 09:02 AM | BY: T
The eruption of the volcano has undergone a change from explosive to mainly effusive over the past few hours, INSIVUMEH reports in the latest bulletin last night (22h00 local time). Instead of a large sustained ash column, there are now smaller pulsating ash emissions reaching 3-700 m height, but instead the volcano is producing large (for Fuego) lava flows between 900 and 1,000 meters long and 150 wide. The different activity is also leaving a different type of seismic signature and has remained stable over the past hours.
According to information obtained by observers nearby and security forces positioned in Morelia Panimache, one lava flow is traveling down the Ceniza canyon (SSW flank), and another towards the ravine Las Lajas and into Barranca El Jute (SE flank) where it is threatening to cut roads.
Despite the dominantly effusive activity, small pyroclastic flows still occurred as well, at a rate of about one per hour, mainly to Ceniza canyon, and producing fine fine ash columns. Ashfall was last reported only in Panimaché, Morelia, Yucales and Sangre de Cristo.
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Friday, Sep 14, 2012
Fuego volcano's activity further increased after 03:25 local time on 13 Sep, and culminated in violent explosive activity with medium-sizes pyroclastic flows running down its slopes (mainly through Ceniza Canyon), INSIVUMEH reports.
Thursday, Sep 13, 2012
There has been an increase in volcanic activity. During 24 hours observation 11-12 Sep, there were 13 explosions, 11 weak and 2 moderate ones producing ash clouds reaching 400-600 m height and drifting 6 km to the W and NW. At night, strombolian activity with incandescent material was seen ejected to 75-100 m height. Weak avalanches traveled towards Taniluya and Ash canyons. ... [more]
Tuesday, Sep 11, 2012
INSIVUMEH observed 5 weak explosions ejecting ash plumes to 400 m above the crater, drifting west and northwest accompanied by rumbling and degassing sounds lasting between 1-5 minutes. ... [more]
Monday, Sep 10, 2012
4 weak explosions with ash plumes rising 300 m and some glowing material ejected to about 100 m were observed during the past observation period 8-9 Sep. Small avalanches of rocks towards the Tniluya and Ceniza Canyons were produced by material falling back from the explosions. Weak degassing sounds are heard. ... [more]
Saturday, Sep 08, 2012
After the end of its recent paroxysm on 4 August, the volcano has quieted down a lot. INSIVUMEH reports only white steaming and that the lava flows are cooling and not producing avalanches. ... [more]