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Volcanic activity worldwide 23 May 2013: Stromboli, Santa María / Santiaguito, Pacaya, Fuego, Popoc...

Thursday May 23, 2013 11:01 AM |

Strombolian eruption from the NE vent (21 May 2013)
Strombolian eruption from the NE vent (21 May 2013)
Eruption plume from Pavlov on 21 May seen from space (NASA)
Eruption plume from Pavlov on 21 May seen from space (NASA)
Current webcam view of Popocatépetl
Current webcam view of Popocatépetl
Current seismic recording at Nevado del Ruiz (OLL station, INGEOMINAS)
Current seismic recording at Nevado del Ruiz (OLL station, INGEOMINAS)
Stromboli (Eolian Islands, Italy): Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity:
In the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average.
... [read more]

Etna (Sicily, Italy): Etna has been almost completely quiet since a brief episode of strombolian activity at the New SE crater in early May. Apart from a few occasional deep-seated explosions in Bocca Nuova detected only on seismic signals (INGV personal communication), the volcano has not shown other surface activity than degassing.

Pavlov (Alaska Peninsula, USA): The eruption at Pavlov continues but seismic and eplosive-effusive eruptive activity have dropped compared to the day before yesterday when an ash plume reached 7,000 m altitude and was visible from space.

Popocatépetl (Central Mexico): Activity has been showing an increase today. Yesterday, CENPRED reported near-continuous emissions of steam and gas and sometimes ash. Some larger explosions occurred at 12:13 h and at 12:34 h local time yesterday. Both produced an eruption column about 1.3 km high and drifting west. Bright glow and strong steaming are currently visible from the webcam images.
A total of 3 hours of spasmodic tremor of low to medium amplitude were recorded yesterday. In addition there were two volcanotectonic earthquakes, one at 13:09 h of magnitude 2.1 and another at 15:55 h of magnitude 1.8 (local times).

Santa María / Santiaguito (Guatemala): Activity has remained weak and dominantly explosive. Occasional explosions from the Caliente dome produce ash plumes rising up to about 700 m.

Pacaya (Guatemala): Strombolian activity persists in the Mackenney crater, which is slowly filling with new lava. The activity can be heard from San Francisco de Sales and ejects incandescent bombs to about 40 m height. As the crater continues to fill up, INSIVUMEH thinks that during the coming days or weeks, new lava flows are likely to appear.

Fuego (Guatemala): Activity has remained stable during the past week. During yesterday, INSIVUMEH recorded 10 weak strombolian-type explosions that generated small ash plumes of up to 600 m height and drifting for 8-10 km before dissipating.

Nevado del Ruiz (Colombia): Small ash emissions were reported yesterday from the volcano. Seismic activity remains elevated, but reduced compared to the recent earthquake swarms in April and early May.
Vorig nieuws
Ash emissions from Turrialba volcano (OVSICORI webcam)
Wednesday, May 22, 2013
Turrialba (Costa Rica): New ash emissions occurred yesterday and produced light ash falls in the outskirts of San José, in the areas of Guadalupe, Tres Ríos, Curridabat, and Ipis (at about 30 km distance). ... [meer...]
Glow from Popocatépetl's summit (CENAPRED webcam)
Tuesday, May 21, 2013
Sangeang Api (Indonesia): An increase in seismicity since 26 April triggered VSI to rise the alert status from 2 to 3 on a scale of 1-4 (from "Waspada", "watch" to Siaga", alert). For the moment, only degassing has been observed as surface activity. ... [meer...]
Thermal image of the crater area of Stromboli (INGV Catania)
Monday, May 20, 2013
Stromboli (Eolian Islands, Italy): Over the past days, Stromboli has returned to normal levels of activity with frequent, mostly small to medium-sized explosions and low to medium tremor. Small lava overflows and frequent rockfalls still occur. ... [meer...]
Pavlof volcano eruption column, May 18, 2013. Photo courtesy Theo Chesley. (AVO)
Sunday, May 19, 2013
Kizimen (Kamchatka): The lava dome remains active and produces hot avalanches on the western and eastern flanks. KVERT reports moderate seismic activity, incandescence of the volcano summit and medium to strong degassing. ... [meer...]
MODIS hot spot data (past 7 days) for Pavlov volcano (ModVolc, Univ. Hawaii)
Friday, May 17, 2013
Sakurajima (Kyushu, Japan): It seems that the latest cycle of increased activity has ended: after several days of intense activity, culminating in larger explosions on 14 and 15 May, the volcano has been "taking a rest" lasting about 2 days. This morning, only a small explosion was recorded. ... [meer...]

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