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Stress Drop Characteristics of the Tsunami Generating Earthquake  

Oh, Seok-Hoon (Marine Meteorology & Earthquake Res, Lab., METRI)
Youn, Yong-Hoon (Marine Meteorology & Earthquake Res, Lab., METRI)
Yang, Jun-Mo (Marine Meteorology & Earthquake Res, Lab., METRI)
Kim, Suek-Yung (Marine Meteorology & Earthquake Res, Lab., METRI)
Lee, Duk-Kee (Marine Meteorology & Earthquake Res, Lab., METRI)
Publication Information
Journal of the Korean earth science society / v.24, no.8, 2003 , pp. 704-710 More about this Journal
Abstract
A study for analysing the characteristics of the 'Tsunami Earthquake' and 'Tsunamigenic Earthquake' has been done in terms of stress drop and tectonic characteristics using previous studies on magnitude, moment, energy, and length of fault. The 'Tsunami Earthquake' seemed to occur mainly on the subduction environment with a very low stress drop of about 10 bars and a thrust dip angle comparing those of the 'Tsunamigenic Earthquake' or other earthquakes. Released energy to moment ratio of the 'Tsunami Earthquake' also seemed to be lower. Earthquakes which generated tsunami in the East Sea seemed to be 'Tsunamigenic Earthquake' with a stress drop of about 30${\sim}$50 bars, and an average energy to moment ratio. Hence, stress drop, energy to moment ratio, and thrust dip angle seem to be indicators of earthquakes that produce tsunamis.
Keywords
stress drop; dip angle; energy to moment ratio; tsunami earthquake;
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