Systematic relocation of seismicity on Hawaii Island from 1992 to 2009 using waveform cross correlation and cluster analysis

TitleSystematic relocation of seismicity on Hawaii Island from 1992 to 2009 using waveform cross correlation and cluster analysis
Publication TypeJournal Article
Year of Publication2013
AuthorsMatoza RS, Shearer PM, Lin G.Q, Wolfe C.J, Okubo P.G
JournalJournal of Geophysical Research-Solid Earth
Date Published2013/05
Type of ArticleArticle
ISBN Number2169-9313
Accession NumberWOS:000327299800016
Keywordsbeneath kilauea volcano; california hypocenter relocation; cluster analysis; cross correlation; earthquake locations; flank; Hawaiian seismicity; long-period event; mauna-loa; multiplet; northern hayward fault; rapid deformation; relative; relative relocation; relocation; south; station terms

The analysis and interpretation of seismicity from mantle depths to the surface play a key role in understanding how Hawaiian volcanoes work. We present results from a comprehensive and systematic re-analysis of waveforms from 130,902 seismic events recorded by the U.S. Geological Survey Hawaiian Volcano Observatory permanent seismic network from January 1992 to March 2009. We compute high-precision relative relocations for 101,390 events (77% of all events considered) using waveform cross correlation and cluster analysis, resulting in a multiyear systematically processed catalog of seismicity for all of Hawaii Island. The 17 years of relocated seismicity exhibit a dramatic sharpening of earthquake clustering along faults, streaks, and magmatic features, permitting a more detailed understanding of fault geometries and volcanic and tectonic processes. Our relocation results are generally consistent with previous studies that have focused on more specific regions of Hawaii. The relocated catalog includes crustal seismicity at Kilauea and its rift zones, seismicity delineating crustal detachment faults separating volcanic pile and old oceanic crust on the flanks of Kilauea and Mauna Loa, events along inferred magma conduits, and events along inferred mantle fault zones. The relocated catalog is available for download in the supporting information.

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