Hualālai - Volcano Updates

Alert Level: NORMAL, Color Code: GREEN 2021-10-07 21:59:36

HAWAIIAN VOLCANO OBSERVATORY MONTHLY UPDATE
U.S. Geological Survey
Thursday, October 7, 2021, 11:59 AM HST (Thursday, October 7, 2021, 21:59 UTC)


HUALALAI VOLCANO (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 recorded at Hualālai Volcano during the past month. There were 11 small-magnitude earthquakes—all less than M3.0—detected in the vicinity of the volcano. One earthquake of M3.1 was detected on October 2 about 3 miles offshore from Kaiwi point. This earthquake activity is on par with previous months.

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 one continuous GPS instrument and a 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.

More Information:
Hualālai volcano summary also available by phone: (808) 967-8877
Hualālai website: https://www.usgs.gov/volcanoes/hualalai


This notice contains additional volcanoes not displayed: Haleakala (NORMAL/GREEN), Mauna Kea (NORMAL/GREEN), Loihi Seamount (UNASSIGNED/UNASSIGNED).

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Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hawaiian-volcano-observatory/hazards

Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hawaiian-volcano-observatory/earthquakes

Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/natural-hazards/volcano-hazards/about-alert-levels

CONTACT INFORMATION:

askHVO@usgs.gov

The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi.