Monthly volcano update: rate of earthquakes beneath Mauna Loa increased

The rate of earthquakes deeper than 8 miles beneath and southwest of Mauna Loa’s summit caldera was slightly elevated during the past month.

Shallower seismicity remained stable. All earthquakes below the volcano’s summit and upper-elevation flanks were of small magnitudes.

Data from Global Positioning System instruments on Mauna Loa indicate inflation as magma replenishes the summit reservoir system.

Gas and temperature data from a station on the Southwest Rift Zone showed no significant changes in the past month.

The Hawaiian Volcano Observatory continues to closely monitor the volcano and will issue another update in one month, or earlier should conditions change significantly.

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.

No significant activity was detected at Haleakalā volcano during the past month. The Hawaiian Volcano Observatory seismometers recorded no earthquakes in the vicinity of the volcano.

No significant activity was detected at Mauna Kea 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.

No significant activity was detected at Kamaʻehuakanaloa volcano (formerly Lōʻihi Seamount) during the past month. Seismic activity remained low, and was representative of background activity levels at the volcano. All earthquakes were of small magnitudes.