Mauna Loa Volcano Eruption Update

The National Park Service on an update of Mauna Loa. Join us on our Big Island Circle tour which includes Hawaii National Volcanoes Park. Travel in luxury Mercedes vans to experience the beauty and culture of Hawaii.

HAWAIIAN VOLCANO OBSERVATORY WEEKLY UPDATE
Thursday, June 16, 2022, 7:29 AM HST

MAUNA LOA

Activity Summary: Mauna Loa Volcano is not erupting. Rates of seismicity remain slightly elevated above long-term background levels, but have not changed significantly over the past week. Other Mauna Loa monitoring data streams—ground deformation, gas concentrations, visual appearance in webcams—show no significant changes.

Observations:
During the past week, HVO seismometers recorded approximately 26 small-magnitude (below M3.0) earthquakes below the summit and upper-elevation flanks of Mauna Loa. All of these earthquakes occurred at shallow depths less than 15 kilometers (9 miles) below sea level.

Global Positioning System (GPS) measurements show low rates of deformation in the volcano’s summit region continuing through the past week.

Concentrations of sulfur dioxide (SO2), hydrogen sulfide (H2S), and carbon dioxide (CO2), as well as fumarole temperatures, remain stable at both the summit and at Sulphur Cone on the upper Southwest Rift Zone.

Webcam views have shown no changes to the volcanic landscape on Mauna Loa over the past week.