A Seismic Event From a Limestone Mine Collapse in Southern Korean Peninsula

Date: 4/26/2019

Time: 06:00 PM

Room: Grand Ballroom

We have studied a seismic event which had happened on 23rd February, 2016 in Korea. The event’s location has been estimated to be Uljin city in southern Korean Peninsula. Seismic waveforms of the event have shown well developed intermediate period surface waves and weaker body waves with relatively long period signals. This feature of waveforms has not been usual in earthquakes in Korean Peninsula. We have analyzed source characteristics of the event by estimating moment tensor. We have found that the source has non double-couple characteristics. One of our best fit model has been composed 41% CLVD and 58% ISO with Mw 4.4. The moment tensor analysis has shown that the event could be happened from non-tectonic sources like mining activity. Waveform analysis of a station near to the epicenter has shown that several events with smaller size have precede main event. We have surveyed the location and have found that a limestone mine collapse had been resulted in the event.

Presenting Author: Geun Young Kim

Authors