Cleveland volcano (Alaska) activity update: small explosions, destruction and re-growth of small lava dome
Tuesday May 08, 2012 12:05 PM | BY: T
Based on analyses of satellite images, AVO reported on 4 May that the small lava dome recently emplaced in Cleveland's summit crater had been destroyed late in the previous week, but the explosion was too small to be detected by distant infrasound and seismic networks. A small new dome was extruded following the explosion and was the fifth dome to be observed in this eruptive episode which began in July 2011. During 4-5 May two small explosions were detected.
No ash was observed with the mostly-cloudy conditions. Satellite observations were obscured by clouds during 6-8 May.
(Smithsonian / USGS Weekly Volcanic Activity Report)
Thursday, May 03, 2012
Elevated surface temperatures were detected over Cleveland in satellite imagery during 25-29 April and possibly on 30 April. ... [more]
Thursday, Apr 19, 2012
Thursday, Apr 12, 2012
AVO reported that a small explosion from Cleveland was detected at 0112 on 4 April by distant seismic stations and infrasound arrays. Weather conditions prevented the detection of a possible eruption cloud in satellite images or by visual observation of the summit. Observations the next day revealed a thermal anomaly and that the 70-m-diameter lava dome had been destroyed by the explosion. This was the third lava dome that was erupted and subsequently destroyed by explosive events since the eruption began in July 2011. ... [more]
Friday, Mar 30, 2012
Recent satellite views show that a another lava dome has formed in the summit crater over the past week. AVO is raising the volcano color code to ORANGE and volcano alert level to WATCH to reflect this increase in activity. AVO has received no other reports of activity at the volcano. [more]
Thursday, Mar 29, 2012
On 23 March that the Volcano Alert Level and Aviation Color Code for Cleveland were lowered to Advisory and Yellow, respectively, because no explosions had been detected since 13 March and lava-dome growth was not evident after that. [more]