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ONFLUIDINJECTIONINDUCEDEARTHQUAKEINRONGCHANGAREA |
ZhuLixia;HuangShiyuan;WeiHongme |
(EarthquakeAdministrationofChongqingMunicipality,Chongqing 401147) |
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Abstract TheseismicactivityinRongchangareaofChongqingin2006wasremarkableandninefeltearth quakesoccurred.Theinvestigationonearthquakesitesdiscoveredthattheconditionofthewastewaterpourshad changed.Therelationofpouredwaterwiththeseismicactivityisanalyzed,andthepossiblefocaldevelopment pattern ofthe Rongchangearthquakeisdiscussedfromthetectonicbackground,thefocalmachanismsolutionandsoon.ItisconsideredthattheseismogenicmodelofRongchangdestructiveearthquake(aboutMs5.0)iscontroledby thelocalstressfieldinSichuanbasin.Thepouredwatercausesfrequentsmallearthquakesandchangesthepartial infiltrationandtheporepressure,finallycausesthecracktoexpandandtherupturetooccur.
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Key words:
fluidinjectioninducedearthquake
seismogenicmodel
Huayingshanbasementfault
porewaterpressure
Rongchangarea
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Received: 01 January 1900
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Corresponding Authors:
ZhuLixia
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