Crustal Stress and Structure at Kīlauea Volcano Inferred from Seismic Anisotropy
Crustal Stress and Structure at Kīlauea Volcano Inferred from Seismic Anisotropy
Jessica H. Johnson1, Donald A. Swanson2, Diana C. Roman3, Michael P. Poland2, and Weston A. Thelen2
Corresponding author: J. H. Johnson, University of Bristol, School of Earth Sciences, Wills Memorial Building, Queen’s Road, Bristol BS8 1RJ, United Kingdom. ()
1Center for the Study of Active Volcanoes, University of Hawaii, Hilo, Hawii
2Hawaiian Volcano Observatory, U.S. Geological Survey, Hawaii National Park, Hawaii
3Department of Terrestrial Magnetism, Carnegie Institution for Science, Washington, D.C.
AGU Monograph: Hawaiian Volcanoes
Introduction
The auxiliary material consists of two files. The first (Supplementary Table S1) is a table of earthquakes used in the fault fault-plane solution (FPS) analysis at Kīlauea. The data are divided into those earthquakes whose FPSs have been inverted for directly from the Hawaiian Volcano Observatory (HVO) catalog, labelled “Catalog,”, and those which have been repicked by hand and relocated, labelled “Reprocessed.”. The second file contains the surface traces of cracks, fractures, and fissures on Kīlauea and the south flank of Mauna Loa. This structure database has taken digital data from published geologic maps by Wolfe and Morris (1996) and Neal and Lockwood (2002), and additional eruptive fissures in the east rift zone were added from HVO files, as were several faults in the caldera region.
1. ts01.pdf
A table of earthquakes used in the fault plane solution (FPS) analysis at Kīlauea. These data are presented in Figures 12.2 and 12.3 of the main text.
1.1 Column “Event ID#”: The event identification number of the earthquake in the HVO catalog.
1.2 Column “Year”: The calendar year that the earthquake occurred.
1.3 Column “Month”:The calendar month that the earthquake occurred.
1.4 Column “Day”: The day of the month that the earthquake occurred.
1.5 Column “Hour”: Hour of the day that the earthquake occurred.
1.6 Column “Minute”: Minute of the hour that the earthquake occurred
1.7 Column “Second”: Second of the minute that the earthquake occurred, to two decimal places.
1.8 Column “Long”: Longitude of earthquake epicenter, in degrees (°o).
1.9 Column “Lat”: Latitude of earthquake epicenter, in degrees (°o).
1.10 Column “Depth”: Depth below the surface of the earthquake hypocenter, measured in kilometers (km).
1.11 Column “Mag”: Local magnitude of the earthquake.
1.12 Column “Strike”: Strike of the principal nodal plane of the FPS for the earthquake, measured in degrees (°o) from north.
1.13 Column “Dip”: Dip of the principal nodal plane of the FPS for the earthquake, measured in degrees (°o) from horizontal.
1.14 Column “Rake”: Rake of the principal nodal plane of the FPS for the earthquake, measured in degrees (°o) from horizontal.
1.15 Column “P-axis az”: Azimuth of the pressure axis from the FPS, measured in degrees (°o) from north.
1.16 Column “P-axis pl”: Plunge of the pressure axis from the FPS, measured in degrees (°o) from horizontal.
1.17 Column “T-axis az”: Azimuth of the tension axis from the FPS, measured in degrees (°o) from north.
1.18 Column “T-axis pl”: Plunge of the tension axis from the FPS, measured in degrees (°o) from horizontal.
2. ts02.txt
A list of longitude and latitudes (in degrees) of mapped fault, fracture, and fissure traces for Kilauea Volcano, space delimited. “>” indicates the end of one trace and the beginning of another.
References
Neal, C.A., and J.P. Lockwood (2002), Geologic map of the summit region of Kilauea Volcano, Hawaii, Tech. Rep., Geologic Investigations Series I-2759, scale 1:24,000, U.S. Geol. Surv., Reston, Va.
Wolfe, E.W., and J.Morris (1996), Geologic map of the island of Hawaii, Tech. Rep., Misc. Invest. Seri. Map I-252-A, scale 1:100,000, U.S. Geol. Surv., Reston, Va.