USGS Volcano Hazards Program Volcano Update

HVO update page and observatory web site

There were no detected earthquakes and no other significant changes.
Background: The most recent eruption on Haleakala was probably between A.D. 1480 and 1600. Haleakala Volcano is monitored by a continuous GPS instrument and a seismometer located near the southwest edge of the crater. Key sites on Haleakala are resurveyed using GPS receivers every few years to detect any changes in the volcano's shape.

Update in Common Alerting Protocol (CAP) format