Seismic Source Study of Local and Regional Earthquakes in and near Korea Using Moment Tensor Inversion

The purpose of this investigation is to determine source parameters such as focal mechanism, seismic moment, and source depth from recent shallow-focus earthquakes ('94∼'96) with sparse coverage in and near the Korean Peninsula. The moment tensor inversion method (TDMT_INV) is used to find the source mechanism. The focal solution for the Youngwol earthquake of December 13, 1996, is found to be a right-lateral strike slip with strike NE, and the Kyongju earthquake of June 25, 1997, is found to be a thrust fault with slight left-lateral in SE directions. The solution of the Neftegorsk earthquake in Sakhalin on May 27, 199s is also determined as a right-lateral strike-slip with 83° dip and NE strike.