HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Deformation and seismicity remain above long-term background.
Nov 9, 2017 18:57 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly in the past week and persist above long-term background levels. Observations: Small-magnitude earthquakes have been occurring primarily beneath the summit caldera and upper Southwest Rift Zone. These were mostly at shallow depths of less than 5 km (3 mi). Global Positioning System (GPS) and satellite radar (InSAR) measurements continue to show deformation consistent with inflation of a magma reservoir beneath the summit caldera and upper ...