Hawaiian Volcano Observatory

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Depth of Earthquakes - Past Month - Kīlauea
December 31, 2019

Depth of Earthquakes - Past Month - Kīlauea

Depth of earthquakes (circles) during the past year. Circle-size represents magnitude, and color indicates depth.

Earthquake Depths - Past Month Mauna Loa
December 31, 2019

Earthquake Depths - Past Month Mauna Loa

Earthquake Depths - Past Month Mauna Loa. Depth of earthquakes during the past month in the area shown on the map above. On both figures, circle-size represents magnitude, and color indicates depth.

Earthquake Rates - Past Year - Kīlauea
December 31, 2019

Earthquake Rates - Past Year - Kīlauea

Number of earthquakes per week during the past year (blue bars). The red line is the cumulative moment (energy) release.

Electronic Tilt at Mauna Loa Summit - Past Month
December 31, 2019

Electronic Tilt at Mauna Loa Summit - Past Month

Electronic Tilt at Mauna Loa Summit - Past Month. 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.

Earthquake Depths - Past Year - Kīlauea
December 31, 2019

Earthquake Depths - Past Year - Kīlauea

Depth of earthquakes during the past year. Circle-size represents magnitude, and color indicates depth.

Electronic Tilt at Mauna Loa Summit - Past Week
December 31, 2019

Electronic Tilt at Mauna Loa Summit - Past Week

Electronic Tilt at Mauna Loa Summit - Past Week

Earthquake Hypocenters Map - Past 5 Years Mauna Loa
December 31, 2019

Earthquake Hypocenters Map - Past 5 Years Mauna Loa

Earthquake Hypocenters Map - Past 5 Years Mauna Loa. Map showing locations of earthquakes during the past year.

Locations and depths of earthquakes during the past week
December 31, 2019

Earthquake Hypocenters Map and Cross Section - Past Week Kilauea

Map showing locations of earthquakes during the past week. Bottom: Depth of earthquakes (circles) during the past week. Circle-size represents magnitude, and color indicates depth. An interactive earthquake plot can be found on the HVO Earthquakes page.

Global Positioning System - Past Year - Kīlauea
December 31, 2019

Global Positioning System - Past Year - Kīlauea

Change in distance between two Global Positioning System (GPS) stations located on opposite sides of Kīlauea's caldera. A rapid increase in distance can be interpreted as inflation of the summit magma reservoir or Pu‘u ‘Ō‘ō magma storage chamber.

Electronic Tilt at Mauna Loa Summit - Past Month
December 31, 2019

Electronic Tilt at Mauna Loa Summit - Past Month

Electronic Tilt at Mauna Loa Summit - Past Month

Earthquake Hypocenters Cross Section - Past 5 Years Mauna Loa
December 31, 2019

Earthquake Hypocenters Cross Section - Past 5 Years Mauna Loa

Earthquake Hypocenters Cross Section - Past 5 Years Mauna Loa. Depth of earthquakes (circles) during the past five years. Circle-size represents magnitude, and color indicates depth. 

Earthquake Rates and Depths - Past Week Monitoring Data for Kīlauea
December 31, 2019

Earthquake Rates and Depths - Past Week Monitoring Data for Kīlauea

Number of earthquakes per day during the past week (blue bars). The red line is the cumulative moment (energy) release.