Augustine volcano news & activity updates:
The eruption at Augustine may be approaching its end.
Activity at Augustine declined to low levels during 7-14 April, with seismicity decreasing to slightly above background levels, and rockfalls and avalanches decreasing in frequency in comparison to previous weeks. Low-level eruptive activity continued, consisting of slow effusion of lava at the summit accompanied by small rockfalls and avalanches on the volcano's flanks. Satellite imagery showed a decline in thermal output consistent with the decreased activity. Sulfur-dioxide gas measurements showed continued high levels of magmatic gas emissions that may have been associated with degassing of lava at the summit of the volcano. Augustine remained at Concern Color Code Orange.
Low-level eruptive activity continues at Augustine volcano, with no significant changes. There are occasional hot block-and-ash flows, rock avalanches, rockfalls, and lava flows. Small and dilute ash clouds resulting from this activity is most likely confined to the immediate vicinity of the volcano. Satellite imagery continued to show a thermal anomaly related to the new lava dome and lava flow. Augustine remains at Concern Color Orange. -->More on Augustine volcano...plus
Low-level eruptive activity continues at Augustine Volcano. Changes in seismic signal characteristics as well as visual obsrevation suggest that Augustine is entering a phase of steady and slower effusion of lava, with intermittent block-and-ash-flows, rock avalanches, and rock falls from the summit lava dome.
The webcameras from AVO captured numerous hot avalanches and prolonged periods of incandescence in the summit area and on the upper northeast flank on several evenings. Satellite images show that thermal anomalies persist.
Observations made on overflights of the volcano this week indicate that the two lava flows on the north and northeast flanks continue to advance slowly. Occasional collapses of the lava flow fronts shed hot blocks and produce minor ash emissions. Estimates using photographs indicate that the new lava dome is about 70 m higher than the level of the lava dome formed in 1986.
Low-level eruptive activity continues at Augustine volcano. Seismicity has increased slightly since Saturday as AVO reports. Minor ash emissions continue intermittently, producing only very minor ash plumes that do not travel far from the island. Rockfalls and small avalanches from the summit area continue to be recorded.
No significant changes at Augustine. The eruption is waning, seismicity decreasing and emissions of ash as well as incandescent rock falls from the lava dome are becoming more and more infrequent.
Activity at Augustine Volcano continues at low levels. Rockfalls and avalanches from the lava dome continue to be recorded by AVO seismic stations. Occasional small explosions produce small plumes of steam and ash. Satellite views of the volcano show a persistent thermal anomaly in the summit area, consistent with the location of the lava dome.
The eruption at Augustine has been slowing down although seismic activity is still above average values and the growth of the lava dome continues slowly. Occasional rockfalls from the lava dome and small resulting pyroclastic flows occur, but their number is descreasing, suggesting that the rate of lava effusion is slowing.....plus [lire toutes]
The eruption at Augustine volcano has clamed down a bit, but continues with occasional ash eruptions, some of which produce small pyroclastic flows that travel down down Augustine's flanks. The highest ash plumes reached about 5 km a.s.l. (15,000 ft) a.s.l. AVO warns that further explosive activity producing ash clouds to heights over 7.6 km (25,000 ft) may still occur with little or no warning. Augustine remained at Concern Color Code Orange.