OBSofGeoazur/OCANice,France

BenYates(résponsable)andDavideOregioni

AcCve/RefracConandPassive/EarthquakeSeismology

OBSofGeoazur/OCANice,France

•  40OBSwithintegrated4.5Hzgimbaledgeophonepackage

•  WelladaptedtoacCveseismic/refracConstudies•  Compact,light-weight,etc

•  Canalsobedeployedforupto6monthsforpassiveseismicstudies–localmicro-seismicity

OBSofGeoazur/OCANice,France

•  Wehave14(atpresent)2Hz,3componentgimbaledgeophonesensors

•  Capableof6monthdeploymentswithonesphere

•  or1yearwith2spheres

•  CanalsobeequippedwithaTrilliumcompact,120ssensor

•  Currentlyonly1trilliumcompactintheGeoazurpark

2Hz

TrilliumCompact

These40OBScanalsobeequippedwithothersensors:

OBSofGeoazur/OCANice,France

•  BasedonPersistormicrocontrollerboard•  3componentgeophone(ortrilliumcompact)sensorplusa

hydrophone•  PowerconsumpConisapproximately350mWat100Hz

samplingof4channels•  32Gcompactflashcards•  SeaScanCmebase(+-4ms/daymax) •  ProgrammableacquisiConwindows(sampling,channels,etc)•  USBDatatransferthroughclosedsphere•  EdgeTechReleaseboard,withburnwire•  BenthosandCmerassecondary,backupreleases•  StrobeandVHFforrecovery•  DataconversiontoMiniseedformataaerrecuperaCon

TechnicalCharacterisCcs:

OBSofGeoazur/OCANice,France

•  GeoazurOBSsince1993-CurrentiniCaldesignfinishedin2004•  Parkhasbeenundergoingarefurbishmentsince2014/15

•  Replaceunreliablelargebandsensors;poorcouplingforshortperiodsensors

•  Acquirefundingtocompleteinstrumentsthatlackedcomponents•  Simplifymechanics,integrate4.5Hzsensors•  Miniseed/SEEDformatfordata

•  NewelectronicsinterfaceforsimplifiedpreparaCon•  ON/OFFthroughclosedsphereandcompletepreparaConatlab•  Simplifiedbaeerypacks

•  Beeermechanicalsystemforrecovery•  Back-savingprocedures,apparatus,etc

NeartermFutureandOngoingProjects

OBSofGeoazur/OCANice,France

•  First–More/BeeerSensorpackages:•  Atleast6More2Hzsensorstohaveatotalof20•  Atleast4or5moreTrilliumcompact120ssensors

•  Secondpriority–newacquisiConsystem•  Lowerpower•  Autogpssync•  etc

•  OtherinnovaCons•  Compass•  Buriedsensors•  Coveredsensors

FutureProjectsPrioriCes:

OBS Art