KVERT reported that during 24-31 December seismic activity from Shiveluch was above background levels, possibly indicating ash plumes rising to an altitude of 4.9 km (16,000 ft) a.s.l. Fumarolic activity was occasionally seen when the weather was clear. Analyses of satellite imagery revealed a large daily thermal anomaly from the lava dome and an ash plume that drifted 15 km W on 28 December.
On 30 December and 5 January, INSIVUMEH reported that explosions from Santa María's Santiaguito lava dome complex produced ash plumes that rose to altitudes of 3-3.4 km (10,000-11,200 ft) a.s.l. and drifted W and SW. The Washington VAAC reported that ash plumes seen on satellite imagery drifted more than 30 km WSW.
The Washington VAAC reported that during 2-4 January thermal anomalies from Sangay were seen in satellite imagery. On 2 January, a pilot saw an ash plume drifting NW at an altitude of 7 km (23,000 ft) a.s.l. An ash plume was also reported by a pilot the next day.
RVO reported that activity from Rabaul caldera's Tavurvur cone was at a low level during 21-31 December; no emission from the crater was observed on most days. White steam plumes accompanied by blue plumes were occasionally emitted. On 23 December, ash emissions rose less than 200 m above the cone.
Based on web camera views, INGEOMINAS reported that during 23-29 December a continuous white plume from Nevado del Huila rose 1 km. The output of sulfur dioxide was less than during the previous months of October and November. Seismicity and the rate of lava extrusion had also decreased during the previous weeks.
KVERT reported that during 24-31 December seismic activity from Kliuchevskoi was above background levels and lava continued to flow down the ESE flank. Strombolian activity ejected material 500 m above the crater. Satellite imagery revealed a large daily thermal anomaly at the volcano.
During 30 December-3 January, HVO reported that lava flowed SE from beneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the ocean at Waikupanaha. Lava was not seen entering the ocean on 4 and 5 January. Thermal anomalies detected by satellite and occasional visual observations revealed active lava flows on the pali.
KVERT reported that a thermal anomaly over Karymsky was detected in satellite imagery during 24-26 and 29-30 December. Gas-and-steam bursts were seen by volcanologists on 28 December. The Level of Aviation Color Code remained at Orange.
Wed, 30 Dec 2009, 06:00
Based on web camera views, the Buenos Aires VAAC reported that a plume from Chaitén's lava-dome complex drifted SE on 30 December at an altitude of 2.1 km (7,000 ft) a.s.l.
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Based on a pilot report, the Darwin VAAC reported that on 3 January a plume from Barren Island rose to an altitude of 1.5 km (5,000 ft) a.s.l. The plume was not identified in satellite imagery; however a meteorological cloud was present in the area.
Read allWed, 30 Dec 2009, 06:00
Based on information from JMA, the Tokyo VAAC reported that during 30 December-5 January multiple explosions from Sakura-jima often produced plumes that rose to altitudes of 1.2-2.7 km (4,000-9,000 ft) a.s.l. and drifted NE, E, SE, and S. During 31 December-4 January pilots reported that ash plumes rose to altitudes of 2.4-5.5 km (8,000-18,000 ft) a.s.l. and drifted SE and E.
Read allWed, 30 Dec 2009, 06:00
On 5 January, OVSICORI-UNA reported that an eruption from Turrialba produced ashfall in local areas, particularly in areas to the SW, including near Irazú volcano (11 km SW). According to news articles, about 20 people evacuated the area.
Read allWed, 30 Dec 2009, 06:00
The IG reported steam emissions from Tungurahua during 30 December-3 January. On 1 January, an ash plume rose to an altitude of 5.9 km (19,500 ft) a.s.l. and drifted NW.
Read allWed, 30 Dec 2009, 06:00
Based on a pilot report, the Darwin VAAC reported that on 2 January an ash plume from Rinjani rose to an unspecified altitude. The plume was not identified in satellite imagery; however a meteorological cloud was present in the area.
Read allWed, 30 Dec 2009, 06:00
OVPDLF reported that a seismic crisis at Piton de la Fournaise on 29 December was characterized by numerous earthquakes in the area W and NW of Dolomieu crater (max M 3), at depths of 1.1-2.2 km below the summit. Deformation was also detected. On 31 December, OVPDLF reported decreased seismicity and fewer landslides within Dolomieu crater on 30 and 31 December.
Read allWed, 30 Dec 2009, 06:00
According to news articles, Nyamuragira erupted on 2 January from a fissure on the SE flank. Park rangers reported hearing a loud explosion in the early morning before seeing flowing lava. By 3 January, the lava flow had traveled 4.6 km, was 15 m wide, and had burned about 10 hectares of forest in a non-populated area of the Virunga National Park.
Read allWed, 30 Dec 2009, 06:00
PHIVOLCS reported declining activity at Mayon from 28 December to 2 January. Steam plumes were emitted from the crater, but ash plumes were last seen on 29 December. In addition, the majority of the seismic signals originated from rockfalls and detached lava fragments rolling down the flanks from advancing lava flows.
Read allWed, 30 Dec 2009, 06:00
An explosive eruption from Galeras detected by the seismic network on 2 January prompted INGEOMINAS to raise the Alert Level to I (Red; "imminent eruption or in progress"). An ash plume rose to an altitude of 12 km (39,400 ft) a.s.l. and drifted W and NW.
Read allWed, 23 Dec 2009, 06:00
Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 24, 26, and 28-29 December. Details of possible resulting emissions were not reported.
Read allWed, 23 Dec 2009, 06:00
MVO reported that during 11-19 December activity from the Soufrière Hills lava dome continued at a high level. Observations with a high-resolution thermal camera revealed multiple rockfall channels on the W, NW, N, and NE flanks of the lava dome. Frequent pyroclastic flows were noted on the northern flank; pyroclastic flows traveled 3 km W down Gages Valley into Spring Ghaut, as far as 4 km NE down the White River valley, and as far as 2 km in Tyers Ghaut (NW).
Read allWed, 23 Dec 2009, 06:00
KVERT reported that during 18-25 December seismic activity from Shiveluch was above background levels, possibly indicating ash plumes rising to an altitude of 4.1 km (13,500 ft) a.s.l. Fumarolic activity was occasionally seen when the weather was clear. A video camera recorded an ash plume on 22 December.
Read allWed, 23 Dec 2009, 06:00
KVERT reported that during 18-25 December seismic activity from Kliuchevskoi was above background levels and lava continued to flow down the ESE flank. Strombolian activity ejected material 300 m above the crater. Satellite imagery revealed a large daily thermal anomaly at the volcano.
Read allWed, 23 Dec 2009, 06:00
During 23-29 December, HVO reported that lava flowed SE from beneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the ocean at Waikupanaha. Thermal anomalies detected by satellite and visual observations revealed active lava flows on and at the base of the pali, and on the coastal plain. On 26 December, explosions at the ocean entry ejected material 15 m high.
Read allWed, 23 Dec 2009, 06:00
KVERT reported that during 18-25 December a thermal anomaly over Karymsky was detected in satellite imagery. Seismic data were not available due to technical problems. Based on information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 25 December an ash plume rose to an altitude of 6.7 km (22,000 ft) a.s.l. and drifted SE.
Read allWed, 23 Dec 2009, 06:00
Based on information from JMA, the Tokyo VAAC reported that during 23-29 December explosions from Sakura-jima produced plumes that rose to altitudes of 1.5-2.7 km (5,000-9,000 ft) a.s.l. and drifted E, SE, and S. During 23-25 and 27 December, pilots reported that ash plumes rose to altitudes of 2.7-4.6 km (9,000-15,000 ft) a.s.l.
Read allWed, 23 Dec 2009, 06:00
Based on analyses of satellite imagery, the Washington VAAC reported that on 26 December an ash plume from San Cristóbal drifted 90 km WSW.
Read allWed, 23 Dec 2009, 06:00
AVO reported that during 27-28 December seismic activity from Redoubt changed from the pattern noted during the previous five months, and was characterized by a series of small repetitive earthquakes that occurred in the vicinity of the summit. The Volcanic Alert Level was raised to Advisory and the Aviation Color Code was raised to Yellow. Based on pilot reports and web camera views, no unusual activity or plumes were noted.
Read allWed, 23 Dec 2009, 06:00
OVSICORI-UNA reported that on 25 December a phreatic eruption from Laguna Caliente, a summit lake of Poás, was seen by visitors standing at a viewpoint to the S of the crater. Lake water mixed with sediment and blocks was ejected 550-600 m above Laguna Caliente and fell in the vicinity of the lake, within the crater. The amount of steam emitted from lava-dome fumaroles, at the S edge of the lake, increased subsequent to the eruption.
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