Periodic slow earthquakes on the flank of Kīlauea volcano, Hawai'i

Details Periodic slow earthquakes on the flank of Kīlauea volcano, Hawai'i Periodic slow earthquakes on the flank of Kīlauea volcano, Hawai'i

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006e%26psl.246..207b&link_type=abstract

Earth and Planetary Science Letters, Volume 246, Issue 3-4, p. 207-216.

Physics

17

Scientific paper

We analyze 8 years of continuous GPS data from the Hilina slump (HS) on Kīlauea volcano's south flank and identify 3 new slow earthquake (SE) events. The new SEs are very similar to the previously identified one from November 2000, suggesting they share a common source. The series of SEs are separated by regular periods of 774 (± 7) days. None of the newly identified events are associated with increased rainfall rates, precluding rainfall as a necessary SE trigger. All of the SEs are followed by increased microseismicity in a ˜NW SE trending band in the southern HS, suggesting that the SEs trigger seismicity. SE location and source parameters are not well-constrained by the CGPS network, although moment can be constrained adequately for the January 2005 event. Using this as a reference, we calculate for the four events equivalent moment magnitude values of 5.6, 5.7, 5.5, and 5.8, in their order of occurrence.

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