Wed, 30 May 2007, 06:00
KVERT reported on 1 June that the Level of Concern Color Code for Kliuchevskoi was lowered from Red to Orange. During 25 May-1 June, seismic activity continued above background levels and a thermal anomaly in the crater was detected on satellite imagery. According to video data and visual observations on 27 and 31 May, there was Strombolian and Vulcanian activity at the summit crater, lava flows, and phreatic bursts on the NW flank from where lava interacted with ice.
Wed, 30 May 2007, 06:00During 30 May-5 June, IG reported that ash plumes intermittently visible from Tungurahua rose to altitudes of 6-7 km (19,700-23,000 ft) a.s.l. and drifted mainly SW, W, and NW. Ashfall was reported from areas downwind between 30 May and 3 June.
Wed, 30 May 2007, 06:00
Data from deformation-monitoring instruments indicated that during 30 May-5 June lava-dome growth at Mount St. Helens continued. Seismicity persisted at low levels, punctuated by M 1.5-2.5, and occasionally larger, earthquakes.
Wed, 30 May 2007, 06:00MVO reported that during 25 May-1 June the lava dome at Soufrière Hills changed very little based on visual observations and seismic activity was very low. Low-level rockfall and pyroclastic flow activity continued. On 31 May, pyroclastic flows traveled approximately 1 km E in the Tar River Valley.
Wed, 30 May 2007, 06:00
KVERT reported that seismic activity at Shiveluch continued above background levels during 25 May-1 June. Based on seismic interpretation, ash plumes possibly rose to an altitude of 9.5 km (31,200 ft) a.s.l. throughout the reporting period.
Wed, 30 May 2007, 06:00INSIVUMEH reported that on 31 May, and 1 and 5 June, lava from the NE flank of Pacaya's MacKenney Cone continued to flow and pooled between the base of the volcano and the plateau. Gas plumes from the summit drifted N and SW and rose to altitudes of 2.8 km (9,200 ft) a.s.l. on 5 June.
Wed, 30 May 2007, 06:00
Based on seismic interpretation, INGEOMINAS reported ash emissions from Nevado del Huila during 27 May that were confirmed later that day by aerial observations. Tremor on 28 May possibly indicated another pulse of ash emissions. Sulfur-dioxide flux measured 3,000 metric tons per day on 1 June and about 6,900 metric tons per day on 2 June.
Wed, 30 May 2007, 06:00Based on satellite image observations and information from RVO, the Darwin VAAC reported that diffuse plumes from Manam rose to an altitude of 3 km (10,000 ft) a.s.l. on 5 June and drifted WNW.
Wed, 30 May 2007, 06:00
RVO reported that the emission of ash clouds from Langila's Crater 2 continued during 22 May-1 June and were occasionally accompanied by roaring noises. Two large explosions on 30 May produced ash plumes that rose to an altitude of 5.3 km (17,400 ft) a.s.l. and drifted NW.
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Wed, 30 May 2007, 06:00During 30 May-5 June, lava from Kilauea flowed SE across a growing lava delta into the ocean at the Poupou entry. By 24 May, lava no longer entered the ocean at the Kamokuna entry. Incandescence was visible from several vents in the Pu'u 'O'o crater and from breakouts above the Pulama pali fault scarp.
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Wed, 30 May 2007, 06:00
Seismic activity at Karymsky was slightly above background levels during 25 May-1 June. Visual observations were not possible due to cloud cover. The Level of Concern Color Code remained at Orange.
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Wed, 30 May 2007, 06:00Based on observations of satellite imagery, the Washington VAAC reported that diffuse ash plumes from Colima drifted SW and S on 31 May.
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Wed, 30 May 2007, 06:00
Based on information from JMA, the Tokyo VAAC reported that ash plumes from Sakura-jima rose straight up to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. during 31 May-1 June. During 4-5 June, plumes again rose to the same altitudes as during 31 May-1 June and drifted W, NW, and E.
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Wed, 23 May 2007, 06:00Based on pilot reports, observations from satellite imagery, and Significant Meteorological Information (SIGMET) advisories, the Buenos Aires VAAC reported that during 22-28 May ash plumes from Ubinas rose to altitudes of 5.5-7.3 km (18,000-24,000 ft) a.s.l. Plumes drifted NE, E, and ESE.
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Wed, 23 May 2007, 06:00
On 30 May, RVO reported observations of Ritter Island following reports of a possible eruption and "sea surges" that destroyed homes on 19 May. On the S part of the island, scorched vegetation was observed and dead marine life (mainly reef fish) was seen around the coast line at heights of 4-6 m a.s.l. There was no evidence of fresh volcanic material, but a new landslide scar extended from the upper most part of the island down to sea level.
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Wed, 23 May 2007, 06:00Based on a Significant Meteorological Information (SIGMET) advisory and satellite image observations, the Buenos Aires VAAC reported that ash plumes from Llaima rose to altitudes of 3-4.3 km (10,000-14,000 ft) a.s.l. on 26 May. The plumes were visible on satellite imagery drifting E.
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Wed, 23 May 2007, 06:00
KVERT reported that during 18-25 May, seismic activity at Kliuchevskoi continued above background levels and a thermal anomaly in the crater was detected on satellite imagery. On 18 May, ashfall was reported from the town of Klyuchi, about 30 km to the NE. According to video data and visual observations, Vulcanian activity at the summit crater and phreatic bursts on the NW flank of the volcano were observed during 22-24 May.
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Wed, 23 May 2007, 06:00According to news articles, scientists from PHIVOLCS conducted an aerial investigation of Bulusan and discovered lahar deposits and three steaming fissures. Lahars were previously reported from the municipalities of Irosin and Juban on 22 May. Scientists also observed steam plumes that rose to altitudes of 1.6-1.7 km (5,200-5,600 ft) a.s.l. and drifted NW and NE.
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Wed, 23 May 2007, 06:00
IG reported that during 23-29 May, steam and steam-and-ash plumes intermittently visible from Tungurahua rose to altitudes of 6-8 km (19,700-26,200 ft) a.s.l. and drifted NW and W. Ashfall was reported from areas SW on 25 May, W and SW on 26 and 29 May, and NW on 27 May.
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Wed, 23 May 2007, 06:00Data from deformation-monitoring instruments indicated that during 23-29 May lava-dome growth at Mount St. Helens continued. Seismicity persisted at low levels, punctuated by M 1.5-2.5, and occasionally larger, earthquakes. In some instances, clouds inhibited visual observations.
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Wed, 23 May 2007, 06:00
Based on visual observations, MVO reported that during 18-25 May lava-dome growth at Soufrière Hills likely ceased and the overall structure of the dome changed very little. Seismic activity was very low. The Alert Level remained at 4 (on a scale of 0-5).
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Wed, 23 May 2007, 06:00KVERT reported that seismic activity at Shiveluch continued above background levels during 18-25 May. Based on seismic interpretation, ash plumes possibly rose to altitudes of 4-8 km (13,100-26,200 ft) a.s.l. throughout the reporting period.
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Wed, 23 May 2007, 06:00
Based on a pilot report and information from CVGHM, the Darwin VAAC reported diffuse ash plumes from Semeru at an altitude of 4.6 (15,000 ft) a.s.l. on 25 May. The plumes drifted W. Ash was not detected on satellite imagery.
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Wed, 23 May 2007, 06:00Based on pilot observations, the Washington VAAC reported that an ash plume from Sangay rose to an altitude of 7.3 km (24,000 ft) a.s.l. on 24 May.
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Wed, 23 May 2007, 06:00
Based on information from IG, the Washington VAAC reported that an ash plume from Reventador rose to an altitude of 3.7 km (12,000 ft) a.s.l. on 18 May and drifted NW. Ash was not observed on satellite imagery.
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Wed, 23 May 2007, 06:00According to a news article, "hot clouds" and incandescent material from Merapi traveled a distance of 1 km SE down the Gendol River on 23 May. People in the nearby village of Muntilan, about 16 km W, reported "hot clouds" and ashfall.
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Wed, 23 May 2007, 06:00
Based on satellite image observations and information from RVO, the Darwin VAAC reported that diffuse plumes from Manam rose to an altitude of 3 km (10,000 ft) a.s.l. on 23 May and drifted SW and W.
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Wed, 23 May 2007, 06:00Based on a Significant Meteorological Information (SIGMET) advisory and satellite image observations, the Buenos Aires VAAC reported that an ash plume from Lascar rose to an altitude of 9.1 km (30,000 ft) a.s.l. on 23 May and drifted SSE.
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