Alaska volcano eruption eases after emitting massive ash cloud

An eruption of the Shishaldin Volcano in Alaska has "gradually declined," according to the Alaska Volcano Observatory.

However, low-level ash emissions below 10,000 feet above sea level continue and a significant ash plume was produced Tuesday morning, reaching a height of around 30,000 feet. 

The plume has since detached, but remained visible between 60-280 miles away from the volcano. 

The National Weather Service issued a SIGMET for the cloud. SIGMETs are brief descriptions of the development and occurrence or expected occurrence in time and space of specified en-route weather phenomena which may affect the safety of all aircraft operations, according to the agency. 

ERUPTING ALASKA VOLCANO SPEWS HIGH ASH CLOIUD, TRIGGERS INFLI...