Cleveland Activity - Color Code YELLOW Alert Level ADVISORY

Satellite viewing conditions were partly cloudy during the last 24 hours and there were no observations or reports of activity.
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Satellite viewing conditions were cloudy to partly cloudy during the last 24 hours and there were no observations or reports of activity.
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Satellite viewing conditions were cloudy to partly cloudy during the last 24 hours and there were no observations or reports of activity.
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Satellite viewing conditions were cloudy to partly cloudy during the last 24 hours and there were no observations or reports of activity.
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Recent clear satellite views of the summit lava dome extruded in late January 2013 show that it has remained unchanged over the past month. The last thermal anomaly was reported on February 26. In response, the Aviation Color Code and Volcano Alert Level for Cleveland was lowered this morning to YELLOW/ADVISORY.

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The summit lava dome extruded in late January 2013 has remained unchanged since the last color code change on February 6, 2013. Anomalous surface temperatures prevalent in late January through mid-February declined and the last thermal anomaly observed in satellite imagery was reported on February 26. Although satellite viewing conditions at Cleveland are typically cloudy, clear views between March 1 and 5 indicate no change has occurred in the summit dome and thermal anomalies no longer are present. Therefore, the Aviation Color Code and Volcano Alert Level for Cleveland is lowered to YELLOW/ADVISORY.


The last confirmed explosion at Cleveland occurred in November, 2012. The presence of a lava dome in the summit crater means that explosions of blocks and ash could occur with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff. However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.

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Cloudy conditions were observed in satellite images of Cleveland Volcano over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Cloudy conditions were observed in satellite images of Cleveland Volcano over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Mostly cloudy to mostly clear conditions were observed in satellite images of Cleveland Volcano over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Cloudy to partly cloudy conditions were observed in satellite images of Cleveland Volcano over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Clouds obscured the summit of Cleveland Volcano in satellite images over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Clouds obscured the summit of Cleveland Volcano in satellite images over the past 24 hours, and AVO received no reports of unusual activity at the volcano.
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Clouds obscured the summit of Cleveland Volcano in satellite images over most of the past week, and AVO received no reports of unusual activity at the volcano. There have been no indications of changes in the state of the lava dome at the volcano's summit.

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Clouds continued to obscure the summit of Cleveland Volcano in satellite images over the past 24 hours. AVO has received no other reports of activity.

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Clouds continued to obscure the summit of Cleveland Volcano in satellite images over the past 24 hours. AVO has received no other reports of activity.

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Clouds obscured the summit of Cleveland Volcano in satellite images over the past 24 hours. AVO has received no other reports of activity.

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Clouds obscured the summit of Cleveland Volcano in satellite images over the past 24 hours. AVO has received no other reports of activity.

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