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Lava fountains and flows from the eruptive fissure near Le Nez coupé de Sainte-Rose in the upper parts of the Grandes Pentes of Piton de la Fournaise volcano. Photos from the website of "Le Journal de l´Isle" (www.clicanoo.com).
Piton de la Fournaise erupted again on 26 December, with a first fissure opening at the base of the summit cone, and a second one just below the slope break of the Grandes Paintes (the steeper slope of the caldera towards the ocean), between 1500 and 1600 m elevation. Lava fountains are emerging from the eruptive fissure and several lava flows are travelling down the slope in direction to the ocean, having reached around 2 km away from the ocean as of Dec. 29.
During 28 December to 2 January, volcanic activity at Tungurahua remained at low levels with small emissions of steam and gas, with low ash content. Plumes rose to a maximum height of 6.1 km (20,000 ft) a.s.l. on 29 December and 2 January.
An eruption began at Fuego on 27 December around 0545 and produced lava flows that traveled down Taniluya (SW) and Seca (W) ravines, initially extending ~800 m and 1,200 m, respectively. At 0602 a pyroclastic flow descended Seca Ravine, producing a S-drifting column of ash that rose to a height of ~2 km above the volcano (or 18,900 ft a.s.l.). Ash fell to the S of the volcano in the port of San Jose.
Growth of the new lava dome inside the crater of Mount St. Helens continued during 28 December to 3 January, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. There were no significant changes in seismicity or deformation during the report period.
Volcanic and seismic activity at Soufrière Hills remained at elevated levels during 23-30 December. Images indicated that the lava dome continued to grow over a broad sector extending from the SW around to the NE. Numerous small rockfalls continued on the S, W, and NE sides of the lava dome, adding to the talus in the upper reaches of the Tar River Valley to the NE.
On 2 January several explosions occurred at Santa María's Santiaguito lava-dome complex. Resultant ash emissions drifted SW. Lava avalanches originated from the SW edge of the Caliente dome, and from the fronts of active lava flows on the volcano's SW flank.
Observations of Santa Ana's crater on 28 December revealed that there were continuous emissions of steam and gas from the lagoon and fumaroles located within the crater. Gas rose 200-500 m above the crater (or 8,400-9,400) and drifted SW. On 30 December, seismicity at Santa Ana was above background levels.
IG reported that during 19-25 December, seismicity was at low levels at Reventador and several small explosions occurred. According to the Washington VAAC, satellite imagery showed an ash plume at a height around 7.6 km (25,000 ft) a.s.l. extending NW on 29 December.
Wed, 28 Dec 2005, 06:00
During 28 December to 3 January, lava from Kilauea continued to enter the sea at the East Lae`apuki area and surface lava flows were visible on the Pulama pali fault scarp. Background volcanic tremor was near normal levels at Kilauea's summit. Volcanic tremor reached moderate levels at Pu`u `O`o.
Read allWed, 28 Dec 2005, 06:00
KVERT reported on 30 December that a new 60- to 80-m diameter cone formed at Karymsky's summit. A small lava dome that was 20-30 m in diameter was noted in the crater of the cone. During 23-30 December, many weak, shallow earthquakes were recorded at the volcano.
Read allWed, 28 Dec 2005, 06:00
During 23 December to 2 January, Galeras emitted gas and small amounts of ash. On the 23rd, four events produced ash plumes that rose to ~3 km above the volcano (or 23,900 ft a.s.l.) and drifted toward the sector of Consacá, ~13 km WSW. A cluster of 33 volcano-tectonic earthquakes occurred beneath the volcano's crater during 29-30 December.
Read allWed, 28 Dec 2005, 06:00
During 28 December to 2 January, several small explosions occurred at Colima, producing ash plumes that reached ~6.1-7.6 km (20,000-25,000 ft) a.s.l. on 2 January.
Read allWed, 28 Dec 2005, 06:00
Unrest continued at Augustine during 23-30 December. Seismicity rates decreased during the week, while steam-and-gas emissions continued. Brief views of the volcano during clear weather revealed that steam was continuously emitted from the volcano.
Read allMon, 26 Dec 2005, 10:04
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Eruption of Popocatepetl on Dec. 25, 2005 (image from CENAPRED's webcam)
Popo sends his Christmas greetings with a moderate explosion that produced an ash column of about 2 km height and showering the volcano's top with incandescent fragments early in the morning of Christmas Day (Dec. 25, 2005).
Fri, 23 Dec 2005, 13:50
Eruptive activity at Manaro volcano continues, but has decreased significantly over the past week. Scientists are monitoring the eruption, hoping that it will soon be possible to lower the alert level and permit some 3000 residents that had been evacuated to return to their homes.
Wed, 21 Dec 2005, 06:00
Growth of the new lava dome inside the crater of Mount St. Helens continued during 21-27 December, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. Small rockfalls continued from the growing lava dome, with larger ones producing ash plumes that were visible above the crater rim.
Read allWed, 21 Dec 2005, 06:00
A phreatic eruption began at Soputan on 26 December around 1230 following heavy rain that contacted lava at the volcano's summit. On 27 December at 0400, a Strombolian eruption began that lasted ~50 minutes. Incandescent volcanic material was ejected ~35 m, and avalanches of volcanic material traveled as far as 750 m E.
Read allWed, 21 Dec 2005, 06:00
Following summit inflation that had been measured at Piton de la Fournaise since the last eruption on 29 November, a seismic crisis began beneath Dolomieu Crater on 26 December at 1444. During the next 2 hours, seismicity shifted to the NE in the direction of "Nez Coupe de Sainte Rose." A first fissure opened at 1715 at the NE base of Piton de la Fournaise. At 2200 eruptive fissures opened in the caldera wall ~500 m E of "Nez Coupe de Sainte Rose," and a lava flow traveled into the "Plaine des Osmondes." By the 28th, eruptive activity was almost constant and an aa lava flow slowly traveled in the "Grandes Brule" and had reached to within ~3 km of the national road.
Read allWed, 21 Dec 2005, 06:00
On 27 December an eruption at Fuego produced an ash plume to a height of ~7.6 km (25,000 ft) a.s.l. that extended SSW and SSE of the volcano. The higher level ash (~7.6 km a.s.l.) drifted W to Honduras, while ash below ~6.1 km (20,000 ft) a.s.l. drifted E to the Pacific coast.
Read allWed, 21 Dec 2005, 06:00
Volcanic and seismic activity at Soufrière Hills remained elevated during 16-23 December. Images revealed that the lava dome continued to grow during the report period. Growth occurred over a broad sector extending from the SW around to the NE.
Read allWed, 21 Dec 2005, 06:00
During 21-23 December, seismicity at Santa Ana was above background levels. Small earthquakes occurred, which were interpreted as being associated with gas pulses. Gas emissions rose to low levels.
Read allWed, 21 Dec 2005, 06:00
During 22-27 December, lava from Kilauea continued to enter the sea at the East Lae`apuki area and surface lava flows were visible on the Pulama pali fault scarp. Background volcanic tremor was near normal levels at Kilauea's summit. Volcanic tremor reached moderate levels at Pu`u `O`o.
Read allWed, 21 Dec 2005, 06:00
Interpretations of seismic data from Karymsky suggested that ten ash plumes rose to ~3.6 km (11,800 ft) a.s.l. during 16-23 December. KVERT volcanologists reported that during 17-21 December, ash plumes rose 2.5-3 km (8,200-9,800 ft) a.s.l. and extended WSW and ENE of the volcano.
Read allWed, 21 Dec 2005, 06:00
Based on information from the US Geological Survey, the Washington VAAC reported that a pilot observed an ash plume from Galeras on 23 December at a height of ~7.3 km (24,000 ft) a.s.l. drifting W.
Read allWed, 21 Dec 2005, 06:00
During 21-27 December, several small explosions occurred at Colima, producing ash plumes that reached ~6.7 km (22,000 ft) a.s.l. on 26 December.
Read allWed, 21 Dec 2005, 06:00
During 21-23 December, ash plumes from Barren Island were visible on satellite imagery at a maximum height of 4.6 km (15,000 ft) a.s.l. on the 21st.
Read allWed, 21 Dec 2005, 06:00
During 16-23 December, unrest continued at Augustine, with elevated seismicity and several small steam explosions occurring. Thermal imaging of the summit area on 22 December using a helicopter-mounted FLIR (Forward Looking Infrared Radiometer) confirmed the presence of a new, high-temperature fumarole or gas vent high on the S flank of the volcano. A gas-measurement flight on 20 December detected sulfur dioxide for the first time at Augustine since routine airborne measurements began in the early 1990s.
Read allWed, 14 Dec 2005, 06:00
On 13 December, lahars were generated at Tungurahua that traveled down the Juive (NNW) and Achupashal (NW) gorges. On 14 December a steam-and-ash cloud rose ~1 km above the volcano (or 19,750 ft a.s.l.). On 17 December, lahars were generated in the NW and W zone of the volcano.
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