USGS Volcano Hazards Program Volcano Update

HVO update page and observatory web site

No unusual seismicity or deformation was detected. Two earthquakes were located beneath the summit area and the northwest rift zone.
Background: Hualalai is the third most active volcano on Hawai`i Island and typically erupts 2 to 3 times per 1,000 years. Hualalai last erupted in 1801 and, more recently, had a damaging seismic swarm in 1929 that probably was the result of a shallow intrusion of magma. Hualalai Volcano is monitored by a single continuous GPS instrument and a single seismometer located southwest of the summit as well as several instruments on nearby flanks of Mauna Loa and Mauna Kea. Key sites on Hualalai and West Mauna Loa are resurveyed every other year to detect any changes in the volcano's shape. In addition, Hualalai deformation is assessed several times per year using satellite radar interferometry.

Update in Common Alerting Protocol (CAP) format