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TitleCruise report 2013001PGC, the Mw 7.7 Haida Gwaii Earthquake ocean bottom seismometer experiment instrument recovery and active-source seismic refraction experiment, CCG Vessel John P. Tully, 7-14 January, 2013
AuthorRiedel, M; Côté, M M; Neelands, P J
SourceGeological Survey of Canada, Open File 7556, 2014, 43 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
RelatedThis publication is related to Riedel, M; Côté, M M; Neelands, P J; (2014). Cruise report 2012005PGC, the Mw 7.7 Haida Gwaii Earthquake ocean bottom seismometer experiment instrument deployment, gas-plume acoustic imaging, and water sampling, CCG Vessel John P. Tully, 7-11 December, 2012, Geological Survey of Canada, Open File 7555
File formatpdf
ProvinceWestern offshore region
AreaHaida Gwaii; Pacific Ocean
Lat/Long WENS-132.8333 -131.5833 52.8833 52.1167
Subjectsgeophysics; geophysical surveys; earthquakes; earthquake studies; earthquake magnitudes; epicentres; aftershocks; seismic interpretations; seismicity; seismographs; seismological network; seismology; seismic waves
Illustrationslocation maps; tables; photographs; profiles; logs
Natural Resources Canada Library - Ottawa (Earth Sciences)
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
Released2014 05 13
Summary(Plain Language Summary, not published)
This Geological Survey of Canada Openfile summarizes the activities undertaken during the retrieval phase of the Haida Gwaii Earthquake Ocean Bottom Seismometer Experiment. A summary of the deployment phase can be found in Open File 7556. Canada¿s second largest instrumentally recorded earthquake occurred on October 27, 2012, off Haida Gwaii, B.C. The main objective of this research expedition was to retrieve the 14 ocean bottom seismometers (OBS) deployed in the aftershock zones off Moresby Island in December 2012. These data will improve the determination of the location of aftershocks and improve the historic earthquake catalogue. Six OBSs were redeployed to collect seismic refraction data. The seismic refraction defines the velocity structure beneath each of the OBSs, thus improving uncertainty in the earthquake location processing. A hull-mounted 3.5 kHz sounder was used to image features. Water samples a prominent gas emission sites were collected for gas chemistry.