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The 2002 Denali fault earthquake,Alaska: a large magnitude,slip-partitioned event |
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| Authors: | Eberhart-Phillips Donna Haeussler Peter J Freymueller Jeffrey T Frankel Arthur D Rubin Charles M Craw Patricia Ratchkovski Natalia A Anderson Greg Carver Gary A Crone Anthony J Dawson Timothy E Fletcher Hilary Hansen Roger Harp Edwin L Harris Ruth A Hill David P Hreinsdóttir Sigrun Jibson Randall W Jones Lucile M Kayen Robert Keefer David K Larsen Christopher F Moran Seth C Personius Stephen F Plafker George Sherrod Brian Sieh Kerry Sitar Nicholas Wallace Wesley K |
| Affiliation: | U.S. Geological Survey, 4200 University Drive, Anchorage, AK 99508, USA. |
| Abstract: | The MW (moment magnitude) 7.9 Denali fault earthquake on 3 November 2002 was associated with 340 kilometers of surface rupture and was the largest strike-slip earthquake in North America in almost 150 years. It illuminates earthquake mechanics and hazards of large strike-slip faults. It began with thrusting on the previously unrecognized Susitna Glacier fault, continued with right-slip on the Denali fault, then took a right step and continued with right-slip on the Totschunda fault. There is good correlation between geologically observed and geophysically inferred moment release. The earthquake produced unusually strong distal effects in the rupture propagation direction, including triggered seismicity. |
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