Post-collapse gravity increase at the summit of Kīlauea Volcano, Hawaiʻi

Geophysical Research Letters
By: , and 



We conducted gravity surveys of the summit area of Kīlauea Volcano, Hawaiʻi, in November 2018 and March 2019, with the goal of determining whether there was any mass change at depth following the volcano's May–August 2018 caldera collapse. Surface deformation between the two surveys was minimal, but we measured a gravity increase (maximum 44 μGal) centered on the caldera that can be modeled as mass accumulation in a region ~1 km beneath the surface. We interpret this mass increase to be mostly magma accumulation in void space that was created during the summit collapse. Caldera uplift was evident by April 2019, indicating that the magma volume had reached a point where pressurization could be sustained. Modeled gravity change suggests a maximum magma storage rate at Kīlauea's summit during November 2018 to March 2019 that is much less than the pre‐2018 magma supply rate to the volcano.

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Publication type Article
Publication Subtype Journal Article
Title Post-collapse gravity increase at the summit of Kīlauea Volcano, Hawaiʻi
Series title Geophysical Research Letters
DOI 10.1029/2019GL084901
Volume 46
Issue 24
Year Published 2019
Language English
Publisher American Geophysical Union
Contributing office(s) Volcano Science Center
Description 10 p.
First page 14430
Last page 14439
Country United States
State Hawaii
Other Geospatial Kīlauea volcano
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