HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Deformation and seismicity rates above long-term background.
Apr 5, 2018 20:01 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly in the past week, persisting at above-long-term background levels. Observations: During the past week, only a few small-magnitude earthquakes occurred beneath the volcano, primarily at depths shallower than 13 km (8 miles). Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) measurements continue to show slow deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone. ...