HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Deformation and seismicity remain above long-term background.
May 18, 2017 20:26 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity continue at elevated levels, compared to previously established baselines. Observations: Mauna Loa is not erupting. During the past week, small-magnitude earthquakes were recorded, mostly from beneath the summit caldera and upper southwest rift zone of the volcano at depths up to 5 km (3 mi). Microearthquakes also occurred on the east flank at depths of 5-13 km (3-8 miles). GPS measurements continue to show deformation consistent with inflation of a magma reservoir beneath the ...