Mauna Loa

Tilt and GPS Deformation Data

For more information on how electronic tiltmeters and GPS receivers help monitor the deformation of Kīlauea Volcano, see the HVO Deformation page

Select deformation instruments on Mauna Loa volcano....

Select deformation instruments on Mauna Loa volcano.

(Public domain.)

Click image on right for larger map. Data plots from additional stations are available from our interactive map. Use the right-side menu to view different types of data.

 

 

 

 

 

Electronic Tilt at Mauna Loa Summit - Past Week

Electronic Tilt at Mauna Loa Summit - Past Week

Electronic Tilt at Mauna Loa Summit - Past Month

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. 
 

Global Positioning System - Cross-caldera Distance Change

Past Year

Cross-caldera Distance Change - Past Year Mauna Loa

Past 5 Years

Cross-caldera Distance Change - Past 5 Years Mauna Loa

Above: Changes in distance between two GPS stations on opposite sides of MOKUAWEOAWEO, Mauna Loa's summit caldera. Extension across the caldera is often an indication of inflation of the shallow summit magma reservoir. 

Global Positioning System - Summit Vertical Motion

Past Year

Summit Vertical Motion - Past Year Mauna Loa

Past 5 Years

Summit Vertical Motion - Past 5 Years Mauna Loa

Above: Vertical motion of a GPS station on the southeast side of Mauna Loa's summit caldera. This station is in an area that has historically shown the largest amount of uplift with inflation. An offset in early 2014 is due to an equipment change at the station and is not related to deformation of the volcano.