地震学报（英文版）
地震學報（英文版）
지진학보（영문판）
ACTA SEISMOLOGICA SINICA
2004年
6期
635-641
,共7页
高原%梁维%丁香%薛艳%蔡明军%刘希强%苏有锦%彭立国
高原%樑維%丁香%薛豔%蔡明軍%劉希彊%囌有錦%彭立國
고원%량유%정향%설염%채명군%류희강%소유금%팽입국
shear-wave splitting%temporal change%earthquake stress-forecasting%Shidian earthquakes%SAM analysis
In 2001 three earthquakes occurred in Shidian in Yunnan Province, which were the MS=5.2 on April 10, the MS=5.9 on April 12 and the MS=5.3 on June 8. Based on the data from the station Baoshan of Yunnan Telemetry Digital Seismograph Network, the variational characteristics of shear-wave splitting on these series of strong earthquakes has been studied by using the systematic analysis method (SAM) of shear-wave splitting. The result shows the time delays of shear-wave splitting basically increase with earthquake activity intensifying. However the time delays abruptly decrease immediately before strong aftershocks. It accords with the stress relaxation before earthquakes, which was found recently in study on shear-wave splitting. The result suggests it is significant for reducing the harm degree of earthquakes to develop the stress-forecasting on earthquake in strong active tectonic zones and economic developed regions or big cities under the danger of strong earthquakes.
