Mauna Loa sees increased seismicity rates, but little change from last month

Mauna Loa continues to show minor inflation beneath the summit as the volcano recovers from the 2022 eruption and magma replenishes the reservoir system.

Mauna Loa’s seismicity rates increased 34%, recovering from rates during the previous month.

The volcano remains relatively quiet, with 70 small-magnitude earthquakes — below magnitude-3 — detected beneath the summit, which is expected following the 2022 eruption.

Gas and temperature data represent background conditions for the volcano, little changed from previous months.

The station on Mauna Loa’s Southwest Rift Zone showed that average hydrogen sulfide concentrations are below about 5 parts per million, sulfur dioxide concentrations are below the detection limit and average fumarole temperatures remain below 183 degrees.

Hawaiian Volcano Observatory continues to closely monitor Mauna Loa and will issue another update in a month — or earlier should conditions change significantly.