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Past Year Monitoring Data for Kīlauea

Seismic Data

Earthquake Hypocenters Map and Cross Section - Past Year
Kilauea Earthquakes past year
Kilauea Earthquakes Cross Section past year
Above Top: Map showing locations of earthquakes during the past year. Bottom: Depth of earthquakes (circles) during the past year. 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 Year
Kilauea earthquake counts for the past year
Kilauea earthquake depths for the past year
Above Top: Number of earthquakes per week during the past year (blue bars). The red line is the cumulative moment (energy) release. Bottom: Depth of earthquakes during the past year in the area shown on the map above. 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

Map of Selected Deformation Stations


For more information on how electronic tiltmeters and GPS receivers help monitor the deformation of Kīlauea Volcano, see the HVO Deformation page. Data plots from additional stations are available from our interactive map. Use the right-side menu to view different types of data.
Global Positioning System - Past Year

Kīlauea Summit

Kilauea Summit cross-caldera GPS deformation for the past year

Pu‘u ‘Ō‘ō Cone

Puu Oo Cone cross-crater GPS deformation for the past year
Above Top: 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. Bottom: Change in distance between two stations near Pu‘u ‘Ō‘ō. A rapid increase in distance can be interpreted as inflation of the summit magma reservoir or Pu‘u ‘Ō‘ō magma storage chamber.

Gas Data

Sulfur dioxide emission rates - Kīlauea summit - past year
Average sulfur dioxide campaign measurements over past year Above: Sulfur dioxide (SO2) emission rates measured using an upward-looking ultraviolet spectrometer. These data are collected by traversing the gas plume in a vehicle, downwind of Halema‘uma‘u, generally within and south of Kīlauea Caldera. Results from multiple traverses during a day are averaged to yield the emission rates shown here. Successful measurements depend on wind, weather, and staff availability. Values are preliminary and are subject to revision.