NEPTUNE CanadaNEPTUNE Canada Seismograph Network Seismograph Network(a progress report - April 2009)(a progress report - April 2009)

Garry RogersGarry Rogers1,21,2, Bob Meldrum, Bob Meldrum11, Taimi Mulder, Taimi Mulder11, , Richard BaldwinRichard Baldwin11 & Andreas Rosenberger & Andreas Rosenberger11

Camille BrillonCamille Brillon22

11Geological Survey of Canada, Geological Survey of Canada, 22University of VictoriaUniversity of Victoria

2010

2009 - NEPTUNE Canada 2009 - NEPTUNE Canada Broadband Seismic Observatory (3)Broadband Seismic Observatory (3)

Guralp Systems successful bidderGuralp Systems successful bidderBroadband seismometerBroadband seismometerStrong motion accelerometerStrong motion accelerometerSpherical titanium caseSpherical titanium caseBuried beneath the sea floorBuried beneath the sea floorNearby differential pressure gauge, current Nearby differential pressure gauge, current

meter and hydrophone ( for 2010)meter and hydrophone ( for 2010)Backup battery for power outages (for 2010)Backup battery for power outages (for 2010)

Current recording and archiving of Current recording and archiving of broadband seismic databroadband seismic data

• Data received and distributed by an Data received and distributed by an ANTELOPE system behind military firewallANTELOPE system behind military firewall

• Data is being archived temporarily at PGCData is being archived temporarily at PGC• Seismometer masses not yet centred and Seismometer masses not yet centred and

instruments not yet calibrated (soon).instruments not yet calibrated (soon).• Hi frequency data flow is subject to military Hi frequency data flow is subject to military

screening (~14% diverted since screening (~14% diverted since December)December)

• Military diversion for testing Sep - NovMilitary diversion for testing Sep - Nov

2010

2010 - 42010 - 4thth NEPTUNE Canada NEPTUNE Canada Broadband Seismic Observatory Broadband Seismic Observatory

Partnership: University of Washington, IRIS, Partnership: University of Washington, IRIS, GSC, (USGS), NEPTUNE Canada.GSC, (USGS), NEPTUNE Canada.

Guralp Systems will refurbish UW OBS to be Guralp Systems will refurbish UW OBS to be identical to NEPTUNE Canada designidentical to NEPTUNE Canada design

Occupy same vault as UW installationOccupy same vault as UW installation

2010 - NEPTUNE Canada 2010 - NEPTUNE Canada Short Period Ob (4)Short Period Ob (4)

• GEOSENSE feedback seismometer (1hz) GEOSENSE feedback seismometer (1hz) on long term loan from MBARIon long term loan from MBARI

• Same Guralp digitizerSame Guralp digitizer

• Battery backupBattery backup

• Deployed in corehole in basalt or in Deployed in corehole in basalt or in concrete monument on sediment.concrete monument on sediment.

NEPTUNE Canada and the MilitaryNEPTUNE Canada and the Military

• Low frequency data from broadband instruments Low frequency data from broadband instruments will flow all the time will flow all the time

• High frequency seismic data from all High frequency seismic data from all seismometers may be embargoed at certain seismometers may be embargoed at certain times (0.8Hz) times (0.8Hz)

• Tests were conducted after deployment to Tests were conducted after deployment to determine embargo criteria (Sep.-Nov.)determine embargo criteria (Sep.-Nov.)

• Once set up, automatically picked phases and Once set up, automatically picked phases and hypocenters from ridge events will flow all the hypocenters from ridge events will flow all the time time

Data flow from NEPTUNE Canada Data flow from NEPTUNE Canada seismographs (2010)seismographs (2010)

Once calibrated, seismic data will be archived at Once calibrated, seismic data will be archived at IRIS the Geological Survey of Canada.IRIS the Geological Survey of Canada.

Associated data: hydrophone, current meter, Associated data: hydrophone, current meter,

pressure gauge will be archived at NEPTUNE pressure gauge will be archived at NEPTUNE Canada.Canada.

Automatic earthquake solutions from the ridge will Automatic earthquake solutions from the ridge will be sent in real time to NEPTUNE Canada and be sent in real time to NEPTUNE Canada and the Geological Survey of Canada.the Geological Survey of Canada.