Cleveland Volcano is continuing to erupt.  On Friday afternoon, a blast shook the Aleutian volcano for the second time in a single week.

In a release, scientists at the Alaska Volcano Observatory noted that the explosion was similar in size and duration to Wednesday’s blast.  There’s no monitoring network on the volcano itself, but distant seismic stations picked up both explosions.

Scientists haven’t been able to detect the ash clouds associated with either event because of cloudy conditions in the area.  The Observatory says both blasts were too small to interrupt air travel in the region, although Cleveland is on a major international flight path.

Cleveland’s last major eruption in 2001 sent up ash clouds as high as 39,000 feet. Cleveland is on uninhabited Chuginadak Island, about 160 miles west of Unalaska.