Event Name : Cleveland 2016/4
|Start:||April 16, 2016 ||Observed|
|Lava dome: ||
Following its 2014 and 2015 lava domes and explosions, Cleveland remained at Aviation Color Code/Volcano Alert Level YELLOW/ADVISORY until April 16, 2016, when AVO detected an explosion at Cleveland in both infrasound (air pressure) and seismic data and raised the Aviation Color Code/Volcano Alert Level to ORANGE/WATCH. There were no recent satellite views at the time of the explosion. The explosion was detected at 10:58 AM, AKDT. There was no evidence of ongoing eruption after the explosion, and AVO lowered the Aviation Color Code/Volcano Alert Level to YELLOW/ADVISORY on April 29, 2016.
On May 5, 2016, at 18:44 AKDT (2:44 UTC May 6, 2016), AVO detected an explosion at Cleveland volcano in both infrasound (air pressure) and seismic data. In response, AVO raised the Aviation Color Code and Volcano Alert Level at Cleveland from YELLOW/ADVISORY to ORANGE/WATCH. Another brief explosion occurred on May 10, at 07:32 AKDT.
On May 17 or 18, a small-volume lava dome was extruded from the summit crater at Cleveland. The low-relief, 50-m (165 ft) diameter dome is similar in size and shape to the ten other domes observed since 2011, the most recent of which was extruded and destroyed earlier in May. During the week of May 20, this lava dome enlarged to about 60 m (197 ft) in diameter.
Following this dome growth, AVO observed no further signs of eruptive activity at Cleveland and lowered the Aviation Color Code and Volcano Alert Level to YELLOW/ADVISORY on June 3, 2016. Weakly elevated surface temperatures detected at the summit in satellite data are consistent with cooling lava.