A small ash cloud was produced rising up to 6.7 km (22 000 feet) above sea level, drifting to the southeast.  A few small earthquakes were also recorded at the volcano during the previous several days.  In response to increased activity, the Alaska Volcano Observatory (AVO) raised the Aviation Color Code to Orange. Explosions from Cleveland typically produce relatively small volcanic ash clouds that

dissipate within hours; however, more significant ash emissions are possible. Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO’s ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. READ MORE