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Brief Report for Mauna Loa Volcano, Moku'aweoweo caldera (Class A) No. 2605a
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citation for this record: Cannon, E.C., and Bürgmann, R.Roland, compilers, 2006, Fault number 2605a, Mauna Loa Volcano, Moku'aweoweo caldera, 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 06:10 AM.
| Synopsis | General: Mauna Loa last erupted in 1984 and is swelling toward its next eruption (D.A. Swanson, written commun., 2005). Faults associated with Mauna Loa include the Kealakekua fault system [2603], Kahuku fault system [2604], Moku'aweoweo caldera [2605a], northeast rift zone of Mauna Loa [2605b], southwest rift zone of Mauna Loa [2605c], the Ka'oiki seismic zone [2606], and the Ka'oiki-Honu'apo fault system [2607]. The Kealakekua and Kahuku fault systems, the Ka'oiki seismic zone, and the Ka'Miki-Honu'apo fault systems are described separately. In addition, several historic eruptions have occurred on Mauna Loa's flanks from radial vents oriented radially to the summit (Trusdell, 1995 #6975). The radial vents represent rock-breaking events and their broad distribution on Mauna Loa is not confined to rift zone locations. Plate 1 shows the radial vents based on Wolfe and Morris (1996 #6977). Refer to Trusdell (1995 #6975) for additional information on volcanic hazards associated with radial vents. Sections: This fault has 3 sections. The sections designated for Mauna Loa Volcano include Moku'aweoweo caldera [2605a], the northeast rift zone [2605b], and the southwest rift zone [2605c]. |
| County(s) and State(s) | HAWAII COUNTY COUNTY, HAWAII |
| AMS sheet(s) | Hawaii |
| Physiographic province(s) | HAWAIIAN - EMPEROR ISLAND - SEAMOUNT CHAIN |
| Length (km) | This section is 7 km of a total fault length of 59 km. |
| Average strike | N. 28° E. (for section) versus N. 33° E. (for whole fault) |
| Sense of movement | |
| Dip Direction | |
| Historic earthquake | Ka'u earthquake 1868 |
| Most recent prehistoric deformation | Latest Quaternary (<15 ka) |
| Slip-rate category | Greater than 5.0 mm/yr |
| Date and Compiler(s) | 2006 Eric C. Cannon, none Roland Bürgmann, University of California at Berkeley |
