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Volcanic activity worldwide 16 May 2013: Santa María / Santiaguito, Pacaya, Fuego, Popocatépetl, T...

Thursday May 16, 2013 09:50 AM |

View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)
View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)
Moderate explosion at Popocatépetl this morning
Moderate explosion at Popocatépetl this morning
Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
Current seismic recording at Tungurahua (RETU station, IGPEN)
Current seismic recording at Tungurahua (RETU station, IGPEN)
Current seismic recording from Sabancaya volcano (BHZ station, IGP)
Current seismic recording from Sabancaya volcano (BHZ station, IGP)
Pavlov (Alaska Peninsula, USA): The eruption continues. The volcano produces a lava flow on the northwest flank. Interaction of the lava flow and ice, producing debris flows, as well as possible explosions at the vent produce a steam-ash plume rising up to about 20,000 ft. above sea level.
Residents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO)

Popocatépetl (Central Mexico): Activity remains elevated and ash plumes from frequent explosions of moderate size reach 26,000 ft (8 km) altitude, drifting NE. Ash fall occurred in Paso de Cortés, north of the volcano.
This morning, many explosions were observed ejecting incandescent material to maximum distances of 400 m mainly on the north and north-east flanks.
... [read more]
...15 May:
Relatively strong explosions occurred last night (at 20:21 h local time 14 May) and this morning at 01:46 h (local time). Both eruptions generated columns of steam and ash rising 3 km and the latter explosion ejected incandescent fragments over all the volcano flanks to maximum distances of 1,500 m.
Some episodes of harmonic tremor preceded the explosion at 01:46 h, which was followed by an episode of spasmodic tremor of medium and high amplitudes until 04:40 h.
... [read more]

Santa María / Santiaguito (Guatemala): Only relatively few and weak explosions occurred recently, some of which caused light ash fall in nearby areas. The lava dome is producing a degassing plume most of the time. No reports of activity at the stagnant lava flows.

Pacaya (Guatemala): Strombolian activity has returned or increased and is now ejecting incandescent material to heights of 100 m. Seismic data seem currently not available from INSIVUMEH's website.

Fuego (Guatemala): Explosive activity remains very weak. During the past 24 hour observation interval, INSIVUMEH only counted 3 small explosions.

Nevado del Huila (Colombia): The large volcano has remained calm with little variations in activity (degassing, 100-150 small earthquakes / week).

Machin (Colombia): No changes have occurred - the only signs of activity are small earthquakes, mostly related to rock fracturing inside the volcano SE of the main dome. The alert status remains at yellow.

Galeras (Colombia): Internal / external activity has been low with weak earthquake activity (although at somewhat increasing tendency) and steaming observed. Pasto reports low values of SO2 emissions.

Nevado del Ruiz (Colombia): Seismic (tremor, volcanic-tectonic quakes) and external activity (steaming, occasional weak ash venting) have calmed down a bit over the past days.

Cumbal (Colombia): Pasto volcano observatory reports no significant changes and maintains yellow (unrest) alert level. The only sign of activity is continuing slightly elevated seismicity (up to magnitudes 1) at shallow depths (less than 3 km) under La Plazuela crater on the northern flank of the volcanic complex.

Sotará (Colombia): Weak seismic unrest continued over the past weeks. The alert level remains at yellow.

Tungurahua (Ecuador): The volcano has calmed down a bit compared to the previous week, which is also apparent on recent seismograms. No recent explosions or ash falls were reported.

Sabancaya (Peru): Seismic activity has calmed down a bit compared to the previous weeks.
Previous news
Seismic signal  from Stromboli this morning (STR8 station, INGV)
Wednesday, May 15, 2013
Stromboli (Eolian Islands, Italy): Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater. ... [more]
MODIS hot spot data (past 2 days) for Pavlov volcano (ModVolc, Univ. Hawaii)
Tuesday, May 14, 2013
Sakurajima (Kyushu, Japan): Explosive activity has picked up again at the volcano. Today alone, several explosions have occurred, two of which of moderately large size with ash plumes reaching 10,000 and 12,000 ft (3 and 3.7 km) altitude. (VAAC Tokyo) ... [more]
MODIS hot spot data (past 2 days) for Tolbachik volcano (ModVolc, Univ. Hawaii)
Monday, May 13, 2013
Kizimen (Kamchatka): Activity continues with little changes. Video data showed that the lava dome is still active and produces incandescence and hot avalanches on the western and eastern flanks. Strong and moderate gas-steam activity accompany this process. Satellite data showed a thermal anomaly over the volcano. (KVERT) ... [more]
Current seismic recording from Popocatépetl
Sunday, May 12, 2013
Popocatépetl (Central Mexico): The activity continued to increase over the past days and CENAPRED raised the alert level to Yellow Phase 3 this morning. The volcano has been producing frequent sequences of continuous steam and ash emissions as well as discrete vulcanian-type explosions that throw glowing bombs to several hundred meters distance from the crater and create ash plumes up to about 2 km high. ... [more]
Friday, May 10, 2013
Popocatépetl (Central Mexico): On 9 May, 28 explosions were noted from the volcano, the largest were at 05:16 and 07:01 am. Incandescence was seen at night. Several periods of harmonic tremor were noted in the reporting period. A gas and steam plume drifted SE. ... [more]

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