A Discussion on Fault Activity Based on Cross-fault Observations in the Capital Circle Region of China and Its Relationship with Earthquakes

(整期优先)网络出版时间:2013-01-11
/ 1
Inthispaper,wemadeasystematicstudyonmorethan40yearsofobservationaldataoftentemporaryfault-crossingmeasurementsitesinthecapitalcircleregionofChina.Wecalculatedhorizontalandvertica1componentsoffaultslip,andhorizontalextensionorcompressioncomponents.Consideringthetectoniccharacteristicsofthecapitalcircleregionandregionalseismicity,weanalyzedthepresentfaultactivityofthecapitalcircleregionandtherelationshipwithearthquakes.Theresultsshowthecomplexityoffaultactivityintheregion:thelevelofactivityofallfaultsislow,mostfaultsareleft-lateralstrike-slipfaults;thereislessverticalactivitythanhorizontalactivityandcrustalmovementiscontrolledbyhorizontalmovement;faultactivityandearthquakeactivityhaveacertainrelationship,regionalfaultactivityincreasesbeforeanearthquake,andfaultactivityhascertainabnormalfeaturesbeforestrongearthquakes.