DETERMINATION OF EARTHQUAKEPARAMETERS USING SINGLE STATIONBROADBAND DATA IN SRI LANKA

摘要

We determined epicenters and magnitudes using data from the single broadband seismic station inSri Lanka, PALK. First, we analyzed earthquakes to which epicentral distances from PALK werewithin 40 degree. Most of the events are in and around Andaman and Nicobar Islands in theIndian Ocean. The obtained results show that it is possible to determine epicenters and surfacewave magnitudes with acceptable accuracy using a single station method. We also analyzed an earth tremor in Sri Lanka using data from the PALK station. Despitehigh frequency noises contained in the data, the epicenter determined by the single station methodis consistent with felt reports. The calculated local magnitude is 3.2.