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Brief Report for Kealakekua fault system (Class A) No. 2603
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citation for this record: Cannon, E.C., and Bürgmann, R.Roland, compilers, 2006, Fault number 2603, Kealakekua fault system, in Quaternary fault and fold database of the United States: U.S. Geological Survey website, http://earthquakes.usgs.gov/regional/qfaults, accessed 11/24/2009 06:01 AM.
| Synopsis | The Kealakekua fault system may represent part of a landslide fault scarp for the numerous submarine debris avalanches and slumps off the west flank of Mauna Loa Volcano: Alika 1 and 2 debris avalanches, South Kona debris avalanche and slump, Ka Lae East and West debris avalanches (Lipman, 1995 #6987; Moore and Chadwick, 1995 #6959; Moore and others, 1995 #6958). The Kealakekua fault system may connect with the Kahuku fault system [2604] to form the southwest Hawai'i slide complex, possibly buried beneath lava flows on the western flank of Mauna Loa (Moore and others, 1989 #6961; Lipman, 1995 #6987). Wolfe and Morris (1996 #6977) indicate that the subaerial traces of the Kealakekua fault system are concealed by overlying mapped volcanic units (mainly lava flows) that are 10 ka or younger, and thus the most recent movement must be pre-Holocene. |
| County(s) and State(s) | HAWAII COUNTY COUNTY, HAWAII |
| AMS sheet(s) | Hawaii |
| Physiographic province(s) | HAWAIIAN - EMPEROR ISLAND - SEAMOUNT CHAIN |
| Length (km) | 30 km. |
| Average strike | N. 16° W. |
| Sense of movement | |
| Dip Direction | W; SW |
| Historic earthquake | |
| Most recent prehistoric deformation | Late Quaternary (<130 ka) |
| Slip-rate category | Less than 0.2 mm/yr |
| Date and Compiler(s) | 2006 Eric C. Cannon, none Roland Bürgmann, University of California at Berkeley |
