National Oceanic and Atmospheric Administration
NOAA logo PMEL - A leader in developing ocean observing systems


FY 1995

Inversion of deep-ocean tsunami records for 1987 to 1988 Gulf of Alaska earthquake parameters

Ritsema, J., S.N. Ward, and F.I. González

Bull. Seismol. Soc. Am., 85(3), 747–754 (1995)

High-quality deep-ocean records of tsunamis generated by the 30 November 1987 (Mw = 7.8) and 6 March 1988 (Mw = 7.7) earthquakes in the Gulf of Alaska were inverted for fault-plane parameters and seismic moment using a model that consists of a uniform ocean layer overlaying an elastic half-space. Results were poor for the 30 November 1987 event, the more complex of the two earthquakes. Results were excellent for the 6 March 1988 event, being consistent with values derived from seismic data. Furthermore, the tsunami waveform inversion provided an additional constraint on the rupture length (less than 50 km) of the latter event, demonstrating the supplementary value of tsunami data to analyses of earthquake finite-faulting characteristics.

Contact Sandra Bigley |
Acronyms | Outstanding PMEL Publications
About Us | Research | Publications | Data | Infrastructure | Theme Pages | Education
US Department of Commerce | NOAA | OAR | PMEL
Pacific Marine Environmental Laboratory
7600 Sand Point Way NE
Seattle, WA 98115
  Phone: (206) 526-6239
Fax: (206) 526-6815
Privacy Policy | Disclaimer | Accessibility Statement
Watch PMEL's YouTube Channel