AVO reported that thermal anomalies at Cleveland's summit, detected on satellite imagery during 30 July-5 August, suggested the presence of an active lava flow. A diffuse plume drifted less than 20 km NE, N, and NW at an altitude of 6.1 km (20,000 ft) a.s.l. on 31 July.
SERNAGEOMIN reported that scientists observed fumarolic activity from the edges of the nested cones in Llaima's main crater during aerial observations on 29 July. Sulfur dioxide plumes rose from an area in the E crater. Tephra deposits covered parts of the SE flank.
Based on observations of satellite imagery and information from RVO, the Darwin VAAC reported that on 30 July a low-level plume from Manam rose to an altitude 2.4 km (8,000 ft) a.s.l. and drifted NW.
Based on observations of satellite imagery and pilot reports, AVO reported that ash plumes from Okmok rose to altitudes of 4.6-10.7 km (15,000-35,000 ft) a.s.l. and drifted SW, W, N, NNE, and SE. On 30 July, seismicity alternated between continuous and pulsating volcanic tremor.
The IG reported that seismicity from Reventador decreased during 30-31 July. On 31 July, steam-and-gas plumes with a low ash content were detected on satellite imagery and drifted W and SW. On 1 August, steam-and-gas plumes were emitted and a lava flow in the caldera was active.
Based on pilot observations, the Darwin VAAC reported that an eruption plume from Sumbing rose to an altitude of 4.9 km (16,000 ft) a.s.l. and drifted W. Ash was not identified on satellite imagery. [Correction: CVGHM later confirmed that Sumbing did not erupt on 1 August and attributed the plume origin to either a different volcano or a bushfire that was reported in the area.].
Based on observations of satellite imagery, the Darwin VAAC reported that during 30-31 July diffuse plumes from Batu Tara rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted W.
SERNAGEOMIN reported that clouds obscured camera views of Chaitén's eruption plume during most of 30-31July. A glimpse on 31 July revealed that a steam-and-ash plume rose to an altitude of 1.5 km (4,900 ft) a.s.l. Explosions were heard.
Wed, 30 Jul 2008, 06:00
INSIVUMEH reported that a lahar descended El Jute River to the SE of Fuego on 31 July, carrying fine material as well as blocks. A report on 1 August indicated that explosions produced ash plumes that rose to an altitude of 4.1 km (13,500 ft) a.s.l. and drifted W and SW.
Read allWed, 30 Jul 2008, 06:00
KVERT reported that seismic activity at Karymsky was above background levels during 25 July-1 August and possibly indicated that explosions produced ash plumes to an altitude of 3.7 km (12,100 ft) a.s.l. According to area volcanologists and pilots, ash plumes rose to altitudes of 5-6 km (16,400-19,700 ft) a.s.l. on 25 July.
Read allWed, 30 Jul 2008, 06:00
HVO reported that during 30 July-5 August lava flowed SE through a lava tube system from underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex to the Waikupanaha ocean entry. Explosions from the ocean entry were noted on 30 July. On 31 July, about 2.3 acres (or 25 percent) of the bench E of the ocean entry collapsed.
Read allWed, 30 Jul 2008, 06:00
RVO reported that during 25 July-4 August, ash plumes from Rabaul caldera's Tavurvur cone rose to altitudes of 1.7-3.7 km (5,600-12,000 ft) a.s.l. and drifted W and NW. Ashfall was reported downwind in Rabaul town, Namanula Hill, Malaguna, and surrounding areas.
Read allWed, 30 Jul 2008, 06:00
CVGHM reported on 5 August that ash plumes from Semeru rose to altitudes of 4-4.3 km (13,100-14,100 ft) a.s.l. and were occasionally accompanied by ejected incandescent tephra. Based on visual observations and instrumental data, the Alert level remained at 2 (on a scale of 1-4).
Read allWed, 30 Jul 2008, 06:00
KVERT reported that seismic activity at Shiveluch was slightly above background levels during 25 July-1 August. According to visual observations, small hot avalanches occasionally descended the lava dome and fumaroles were active on 18 and 22 July. Observations of satellite imagery revealed a thermal anomaly on the lava dome daily during the reporting period.
Read allWed, 30 Jul 2008, 06:00
The IG reported that during 30-31 July and 2-5 August, explosions from Tungurahua were detected by the seismic network. Although clouds occasionally prevented visual observations, ash plumes were observed that rose to altitudes of 6-9 km (19,700-29,500 ft) a.s.l. and drifted NW, W, and SW.
Read allTue, 29 Jul 2008, 16:05
A new eruption is reported from Reventador volcano. The Ecuadorian Institute of Geophysics (Istituto Geofisico, IG) reports eruptive tremor starting on 27 July from 15h00 local time. In the evening of that day, incandscence became visible from the summit of the volcano, indicating lava flows. An ash plume rose to 500-2000m and light ashfall was reported in the area around Olmedo.
Read allTue, 29 Jul 2008, 07:16
After several months of quiet, a major collapse of the lava dome of Soufrière Hills took place on 28 July, 2008.
Read allThu, 24 Jul 2008, 12:31
RVO reported that during 12-18 July, ash plumes from Rabaul caldera's Tavurvur cone drifted NW and W. Ashfall was reported in areas downwind including significant accumulation in Rabaul town (3-5 km NW).
Read allThu, 24 Jul 2008, 12:27
On
19 July, activity at Okmok increased as interpreted from seismicity. Possibly, ash plumes rose to altitudes of 7.6-9.1 km (25,000-30,000 ft) a.s.l. The Volcano Alert Level was raised to Warning and the Aviation Color Code was raised to Red.
Read allThu, 24 Jul 2008, 12:19
A new eruption seems to have started at Cleveland volcano on 21 July. AVO raised the Volcano Alert Level as there were reports from pilots and fishing boats in the area, observing a new ash eruption that had started at about noon that day. Pilots reported that an ash-and-steam plume rose to
Read allWed, 23 Jul 2008, 06:00
The USGS reported that seismic tremor from Anatahan slowly increased during 16-26 July. A diffuse sulfur-dioxide plume drifted W on 17 July. According to a Washington VAAC report a low-level plume possibly containing ash drifted 50 km NW on 26 July.
Read allWed, 23 Jul 2008, 06:00
SERNAGEOMIN reported that clouds obscured camera views of Chaitén's eruption plume on 21 and 22 July. The E-drifting eruption plume was weaker when observed on 23 July and only rose to an altitude of less than 2 km (6,600 ft) a.s.l. In contrast, during 21-23 July earthquakes greater than M 2.6 increased in number and magnitude.
Read allWed, 23 Jul 2008, 06:00
Based on observations of satellite imagery, KVERT reported that on 29 July an ash plume from Chikurachki drifted more than 30 km WSW. The level of seismicity was unknown because Chikurachki lacks dedicated seismic instruments. The Level of Concern Color Code was raised to Yellow.
Read allWed, 23 Jul 2008, 06:00
AVO reported that satellite views of Cleveland were hindered on 23 July due to cloud cover. On 24 July, a low-level ash plume and a strong thermal anomaly were noted near the summit. The thermal anomaly suggested the presence of an active lava flow.
Read allWed, 23 Jul 2008, 06:00
Based on observations of satellite imagery, the Darwin VAAC reported that during 25-27 July ash plumes from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted W.
Read allWed, 23 Jul 2008, 06:00
KVERT reported that seismic activity at Karymsky was above background levels on 18, 19, and 23 July and at background levels during 20-22 and 24-25. Explosive activity that produced ashfall was seen by area volcanologists. Interpretation of the seismic data suggested that on 19, 21, and 23 July possible ash-and-gas plumes rose to altitudes of 3 km (10,000 ft) a.s.l.
Read allWed, 23 Jul 2008, 06:00
SERNAGEOMIN reported that cloud cover prevented observations of Llaima during 22-23 July. On 24 July a bluish gas was emitted from a pyroclastic cone in the main crater and steam plumes rose from the W margin of the crater. Later that day, gas-and-ash plumes rose 100 m above the crater and dissipated to the SSE.
Read allWed, 23 Jul 2008, 06:00
Based on observations of satellite imagery and information from RVO, the Darwin VAAC reported that on 29 July low-level plumes from Manam rose to an altitude 2.4 km (8,000 ft) a.s.l. and drifted WNW.
Read all
