?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Fepisodesplatform.eu%2Feprints%2F1281%2F&rft.title=Seismic+analysis+of+the+events+in+the+%0D%0Avicinity+of+the+Preese+Hall+well&rft.creator=Eisner%2C+Leo&rft.creator=Hallo%2C+Miroslav&rft.creator=Matousek%2C+Petr&rft.creator=Oprsal%2C+Ivo&rft.creator=Janska%2C+Eva&rft.subject=Lancashire&rft.subject=Unconventional+hydrocarbon+extraction&rft.subject=Method+and+procesing&rft.description=Unexpected+seismic+activity+was+observed+near+the+exploration+well+Preese+Hall+(Blackpool+area)%2C+coinciding%0D%0Awith+the+period+when+this+well+was+stimulated.+Specif%0D%0Aically%2C+two+earthquakes+were+reported+by+the+British%0D%0AGeological+Survey+(BGS)%3A+the+first+event+of+magnitude+(M)+2.3+on+April+1%2C+2011+and+the+second+event+of+M+1.5%0D%0Aon+May+27%2C+2011.+Both+events+followed+2nd+and+4th+stages+of+hydraulic+stimulations%2C+respectively.+These+events+were+recorded+by+regional+stations.+In+addition%2C+temporary+seismic+stations+were+deployed+in+the+vicinity+of+the+Preese+Hall+well+after+the+first+event+in+order+to+get+more+detailed+information+about+the+seismic+activity+in+the+area.+This+report+summarizes+seismic+activity+associated+with+the+two+main+events%2C+specifically+detection+of+weaker+additional+seismic+events+with+similar+character+and+the+source+mechanism+of+the+largest+events.&rft.publisher=none&rft.date=2011-09&rft.type=Reports&rft.type=NonPeerReviewed&rft.identifier=++Eisner%2C+Leo+and+Hallo%2C+Miroslav+and+Matousek%2C+Petr+and+Oprsal%2C+Ivo+and+Janska%2C+Eva++(2011)+Seismic+analysis+of+the+events+in+the+vicinity+of+the+Preese+Hall+well.++Technical+Report.+none.+++++