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Cleveland reported activity




Event Name : Cleveland 2009/6

Start:June 25, 2009 ± 2 HoursObserved
Stop:June 25, 2009 Observed

Tephra plume: BibCard BibCard
Eruption Type:Explosive
Eruption Product: unknown BibCard
MaxVEI: 2 BibCard
ColHeight: 4600 m BibCard

Description: From McGimsey and others (2014): "For the next three months [following the short-lived eruption in January, 2009], no significant activity was reported or observed at Cleveland, and on May 1, 2009, AVO downgraded the Aviation Color Code and Volcano Alert Level to UNASSIGNED. Then, on the morning of June 25, 2009, satellite imagery caught a small eruption occurring that sent an ash plume up to about 15,000 ft (about 4,600 m) and ballistics onto the upper flank snowfields. As with several previous eruptions, air waves generated by the event were registered on seismometers at nearby volcanoes (M. Haney, AVO/USGS, written commun., 2009, AVO internal logs). AVO promptly elevated the Color Code/Alert Level from UNASSIGNED to ORANGE. When observed, the plume was already detached and moving south over the North Pacific. Based on no further reports or evidence of activity over the next several days, AVO lowered the Color Code/Alert Level to YELLOW/ADVISORY on June 27. The volcano remained quiet for the next couple of weeks, and on July 15, the Color Code/Alert Level was downgraded to UNASSIGNED. No activity was observed or reported during the subsequent 2.5 months."

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Page modified: March 30, 2017 14:36
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