Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano
Science
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Abstract
Deep long-period earthquakes (DLPs) are an enigmatic type of volcanic seismicity that sometimes precedes eruptions but mostly occurs at quiescent volcanoes. These earthquakes are depleted in high-frequency content and typically occur near the base of the crust. We observed a near-periodic, long- lived sequence of more than one million DLPs in the past 19 years beneath the dormant postshield Mauna Kea volcano in Hawai‘i. We argue that this DLP sequence was caused by repeated pressurization of volatiles exsolved through crystallization of cooling magma stalled beneath the crust. This “second boiling” of magma is a well-known process but has not previously been linked to DLP activity. Our observations suggest that, rather than portending eruptions, global DLP activity may more commonly be indicative of stagnant, cooling magma.
Suggested Citation
Wech, A., Thelen, W., Thomas, A., 2020, Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano: Science, v. 368, p. 775-779, https://doi.org/10.1126/science.aba4798.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano |
| Series title | Science |
| DOI | 10.1126/science.aba4798 |
| Volume | 368 |
| Year Published | 2020 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Contributing office(s) | Volcano Science Center |
| Description | 5 p. |
| First page | 775 |
| Last page | 779 |
| Country | United States |
| State | Hawaii |
| Other Geospatial | Mauna Kea volcano |