Seismic Data
Earthquake Hypocenters Map and Cross Section - Past Month
Above Top: Map showing locations of earthquakes during the past month. Bottom: Depth of earthquakes(circles) during the past month. Depth is reported relative to sea level, which is equal to a depth of zero on the above plot. Circle-size represents magnitude, and color indicates depth. An interactive earthquake plot can be found on the HVO Earthquakes page.
Earthquake Rates and Depths - Past Month
Above Top: Number of earthquakes per day during the past month (blue bars). The red line is the cumulative moment (energy) release. Bottom: Depth of earthquakes during the past week in the area shown on the map above. Depth is reported relative to sea level, which is equal to a depth of zero on the above plot. On both figures, circle-size represents magnitude, and color indicates depth. An interactive earthquake plot can be found on the HVO Earthquakes page.
Deformation Data
Electronic Tilt at Mauna Loa Summit - Past Month
Above: Tilt data from a site near the northwest rim of Mauna Loa's summit caldera. The tiltmeter responds to daily and seasonal temperature fluctuations as well as possible changes in Mauna Loa's magma storage system.
Map of Selected Deformation Stations
For more information on how electronic tiltmeters and GPS receivers help monitor the deformation of Mauna Loa Volcano, see the HVO Deformation page.