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Santiaguito volcano (Guatemala): strong explosion and pyroclastic flows

Sunday Sep 22, 2013 19:10 PM | BY: T

Explosion and pyroclastic flows from Santiaguito yesterday morning (INSIVUMEH)
Explosion and pyroclastic flows from Santiaguito yesterday morning (INSIVUMEH)
Another violent eruption occurred at the lava dome yesterday morning (21 Sep) at 8:30 local time. Accompanied by explosions, the Caliente dome suddenly produced a series of major pyroclastic flows triggered by collapse of accumulated viscous lava at the southeastern rim rim and flank of the dome. The flows descended on all sides of the lava dome.
The explosions, accompanied by shock waves that could be heard in 20 km radius, produced an ash plume that rose to about 4.5 km altitude or about 2 km height above the crater. Significant (but smaller compared) ash plume rose from the pyroclastic flows. Ash fall occurred in Quetzaltenango, Santa María de Jesús, Zuníl and other areas downwind.
There has been no recognized precursor to the eruption, illustrating that the activity of the lava dome is highly unpredictable and potentially extremely dangerous. A similar eruption occurred almost exactly one month ago.
Previous news
Earthquakes near Tarumai in 2013
Friday, Sep 20, 2013
Shikotsu (Hokkaido): The latest report of the Japan Meteorological Agency indicates some unrest at the caldera. Seismic activity accompanied by inflation were recorded under the western flank of Tarumai stratovolcano (the most active vent of the system, located on the SW rim of the Shikotsu caldera) between late June and early July this year. ... [more]
Klyuchevskoy volcano last evening with glow from the active lava flow
Thursday, Sep 19, 2013
Klyuchevskoy (Kamchatka): (19 Sep) Lava flows remain active on the SW upper flank and are often visible on the beautiful KVERT webcam. ... [more]
Recent earthquakes under Mauna Loa volcano
Wednesday, Sep 18, 2013
Batu Tara (Sunda Islands, Indonesia): Explosions that produce ash plumes large enough to be spotted on satellite images occur almost daily now. ... [more]
Ash emission from New SE crater yesterday evening (LAVE webcam via etnawalk.it)
Tuesday, Sep 17, 2013
Etna (Sicily, Italy): After a phase of complete quiet since 13 September, weak ash emissions occurred again at the New SE crater during the night 16-17 Sep, accompanied by a slight rise of tremor. This activity ceased again during the early hours of today. ... [more]

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