Alert Level: NORMAL, Color Code: GREEN 2023-11-02 19:26:36 UTC
HAWAIIAN VOLCANO OBSERVATORY MONTHLY UPDATE U.S. Geological Survey Thursday, November 2, 2023, 9:26 AM HST (Thursday, November 2, 2023, 19:26 UTC)
HUALALAI (VNUM #332040) 19°41'31" N 155°52'12" W, Summit Elevation 8278 ft (2523 m) Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN
No significant activity was detected at Hualālai volcano during the past month. Seismic activity remained low, and was representative of background activity levels at the volcano; all earthquakes were of small magnitudes (below M3.0). The continuously recording Global Positioning System (GPS) instrument on Hualālai recorded no significant deformation in the past month.
Background: Hualālai is the third most active volcano on the Island of Hawaiʻi and typically erupts two to three times per 1,000 years. Hualālai last erupted in 1801 and, more recently, had a damaging seismic swarm in 1929 that was probably the result of a shallow intrusion of magma. Hualālai Volcano is monitored by a continuous GPS instrument and seismometer located southeast of the summit, as well as several instruments on nearby flanks of Mauna Loa and Mauna Kea. Key sites on Hualālai and western Mauna Loa are resurveyed using GPS receivers every few years to detect any changes in the volcano's shape.