eprintid: 1678 rev_number: 13 eprint_status: archive userid: 2 dir: disk0/00/00/16/78 datestamp: 2016-05-30 12:20:18 lastmod: 2017-02-08 12:21:33 status_changed: 2016-05-30 12:20:18 type: article metadata_visibility: show creators_name: Clarke, Huw creators_name: Eisner, Leo creators_name: Styles, Peter creators_name: Turner, Peter corp_creators: Cuadrilla Resources Ltd, Lich!eld, UK corp_creators: Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, Prague, Czech Republic, corp_creators: Applied and Environmental Geophysics Research Group, School of Physical and Geographical Sciences, Keele University, Keele, UK, corp_creators: Brigantia Resources Ltd, Lichfeld, UK title: Felt seismicity associated with shale gas hydraulic fracturing: The first documented example in Europe subjects: MP2 subjects: MP4 subjects: RUK1 subjects: SHU divisions: SHEER-3 full_text_status: none abstract: We describe the origin of felt seismicity during the hydraulic fracturing of the Carboniferous Bowland Shale at the Preese Hall 1 exploration well near Blackpool in the UK during 2011. The seismicity resulted from the interaction of hydraulic fracturing and a fault, the location of which was unknown at the time but has subsequently been located and does not intersect the well borehole. Waveform cross correlation is used to detect 50 events in the sequence. A representative hypocenter and strike-slip focal mechanism is calculated using the best recorded seismic event. The hypocenter is calculated to lie 300–400m east, and 330–360m below the injection point and shown to lie on a fault imaged using 3-D seismic at a depth of about 2930m. The 3-D survey shows that not only the event hypocenter but also the focal mechanism correlates strongly with a subsequently identi!able transpressional fault formed during the Late Carboniferous (Variscan) basin inversion. date: 2014-11 date_type: published publication: Geophysical Research Letters volume: 41 number: 23 publisher: American Geophysical Union pagerange: 8308-8314 id_number: doi:10.1002/2014GL062047 issn: 0094-8276 official_url: http://doi.org/10.1002/2014GL062047 access_IS-EPOS: limited owner: Publisher citation: Clarke, Huw and Eisner, Leo and Styles, Peter and Turner, Peter (2014) Felt seismicity associated with shale gas hydraulic fracturing: The first documented example in Europe. Geophysical Research Letters, 41 (23). pp. 8308-8314. DOI: https://doi.org/10.1002/2014GL062047