Mauna Kea - Volcano Updates

Alert Level: NORMAL, Color Code: GREEN 2021-06-04 00:40:58

U.S. Geological Survey
Thursday, June 3, 2021, 2:40 PM HST (Friday, June 4, 2021, 00:40 UTC)

19°49'12" N 155°28'12" W, Summit Elevation 13796 ft (4205 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

No significant activity was recorded at Mauna Kea Volcano during the past month. There were 11 small-magnitude earthquakes—all less than M2.0—detected in the vicinity of the volcano, most of which occurred above 23 kilometers (approximately 14 miles) below sea level. The total earthquake count is similar to the previous month (14). The continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (MKPM, operated by NASA’s Jet Propulsion Laboratory) recorded no significant deformation, but is missing two weeks of data.

Background: Mauna Kea is a shield volcano in the post-shield stage; it last erupted about 4,600 years ago. Monitoring is conducted using three seismometers and one GPS receiver on the volcano, plus instruments on adjacent Kohala volcano and denser seismic and geodetic networks on the north flank of Mauna Loa to the south. From its base on the ocean floor, Mauna Kea is the tallest mountain on earth rising 4,205 m above sea level.

More Information:
Mauna Kea volcano summary also available by phone: (808) 967-8877
Mauna Kea website:

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

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Explanation of Volcano Alert Levels and Aviation Color Codes:


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.