1 WP8 Monitoring seismicity and fluid activity near the fault using existing cabled and autonomous multiparameter seafloor instrumentation MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
2 Objectives -To implement an integrated approach based on multiparameter seafloor observatories, to continuously monitor the micro-seismicity along with the fluid expulsion activity within the submerged fault zone - To find robust and multiparametric methods for implementing early warning strategies in the near future. MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Scientific background (1/2) 3 The Marmara area corresponds to the submerged section of the North-Anatolian Fault => Necessity to deploy underwater instrumentation to improve the characterization of the near-fault seismicity MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Scientific background (2/2) 4 1) Discovery of very characteristic tremors, 44 minutes prior to Izmit 1999 earthquake 2) Finding that gas reservoirs are connected to the Main Marmara fault zone => new perspectives for underwater monitoring Siliviri Tekirdag Are seismic tremors associated with clear anomalies in gas emission activity ? If yes, then : more criteria to evaluate the probability of occurrence of an impending earthquake MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
The situation of underwater 5 monitoring in the Sea of Marmara • KOERI presently operates an unique network of 5 cabled, seafloor observatories (SBOs) including : Broad-Band OBSs, accelerometer, sea bottom temperature, pressure gauge • European effort to collect geochemical and geophysical data from the immediate vicinity of the fault zone, using multi- parameter, autonomous sea-floor observatories http://www.esonet.marmara-dm.itu.edu.tr/ • MARSITE : an unique opportunity for coordinating efforts towards an improved, integrated monitoring of the submarine section of the NAF MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Specific objectives 6 WP8 - Task 1 Collect multi-parameter time-series through three repeated (every 6 months) sea-based cruises, using existing autonomous seafloor observatories (SN-4, piezometers, OBSs, acoustic gas bubble detectors, etc.) TL : G. Marinaro/G. Giovanetti (INGV), Participants : KOERI, IFREMER, ITU, CNR- ISMAR 1. To complement KOERI’s permanent network with an additional network of autonomous, multi-parameter seafloor observatories 2. To collect geophysical and geochemical data using existing submarine equipments (already used in the same area in previous projects) to monitor the possible interactions between fluids and seismicity 3. to collect water samples through repeated oceanographic cruises: i) to constrain the origin of the vented fluids and the possible interaction processes; ii) to the multi-parameter data sets from long-term time series MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
7a Underwater systems to be used - WP8 - Task 1 KOERI BBOBS MEDUSA tow system MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Underwater systems to be used 7b WP8 - Task 1 degassing SN-4 multi-parameter seafloor observatory Sensor Mfr. & model Sampl. rate Sensors: Seismometer Guralp CMG-40T 100 Hz - 2 methane sensors Hydrophone OAS E-2PD 100 Hz - 1 H2S electrode 3-C current meter Nobska MAVS-3 5 Hz - 1 oxygen sensor CTD SeaBird SBE-16plus 1 sample/10 min - 1 CTD - 1 trasmissometer Turbidity meter Wet Labs Echo-BBRTD 1 sample/10 min - radiometer / nuclear CH 4 #1 Franatech METS 1 Hz spectrometer CH 4 #2 Franatech METS 1 Hz - Altimeter Oxygen Aanderaa Optode 3830 1 Hz - Deep Sea Power Cam&Light - Electrical cable (800 m) - Surface unit PC MEDUSA tow system MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Underwater systems to be used - WP8 - Task 1 8 8 Gas Bubble detector OBS Piezometers MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
9a Additional, non-contractual, specific objective within WP8 - Task 1 QUESTION : Is the Istanbul-Silivri fault segment creeping freely ? At what rate ? Or is the fault segment blocked, accumulating elastic deformation that may be released during a next major and damaging earthquake ? MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
9b Work plan 2013 : instrument integration (clinometers, compass, pressure, T…) acoustic signal detection method (frequency content & waveform of the signal) tests at sea : evaluation of resolution, precision, masks for diffraction, reflection processing tools 2014/2015 : 1 st deployment of 4 PXPS : Marmara Sea (R/V Pourquoi Pas ? PI. L. Géli Ifremer) Objective : Monitor Istanbul-Silivri segment of the North Anatolian Fault (NAF), south of Istanbul * ENV.2012.6.4-2 Long-term monitoring experiment in geologically active regions of Europe prone to natural hazards: MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 the Supersite concept 16-FP7- WP8 Presentation ENV-2012-2-stage.
Specific objectives 10 WP8 - Task 2 Seabed, continuous seismological monitoring and integration of multi-parameter datasets from cabled (KOERI’s) and autonomous systems (T, p, seis) TL: C. Gürbüz (KOERI), Participants: IFREMER, INGV, ITU, CNRS 1)To improve methods for the high resolution characterization of the near-fault micro- seismicity, based on KOERI’s permanent network and on autonomous stations 2)To implement specific methods to detect earthquake doublets, slow slip events and seismic tremors 3)To integrate land-based and marine-based seismic networks 4)To process the multi-parameter dataset (seismic signals, sea-bottom water pressure and temperature variations) collected by the submarine KOERI network , for analysis in Task 3 MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Specific objectives 11 WP8 – Task 3 Multi-parameter data analysis TL: P. Henry (CNRS), Participants: KOERI, IFREMER, INGV, INERIS 1) To analyze time series of fluid parameters (fluid pressure in the sediment and at the seafloor, bubble flux, fluid velocity, fluid chemical composition), 2) To examine possible correlations with micro-seismicity and strain. 3) To analyze environmental data (pressure, temperature, salinity, current velocity) from the KOERI’s permanent, cabled network , to : i) correct the datasets from possible environmental effects and ii) to calibrate models of normal mode oscillations of the water column. MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Specific objectives 12 WP8 – Task 4 Prepare the next generation of seafloor observatories for geo-hazard monitoring TL: F. Italiano (INGV), Particants: KOERI, IFREMER, ITU, DAIMAR 1) To improve the existing sea-floor equipments in terms of the amount of contemporary active instruments, their interlink with “smart sensor” capacities (threshold detection, triggering) and the quality of the collected data. 2) To design, build and possibly deploy new generation components including real-time data collection systems (if logistical and budgetary conditions allow it) 3) To integrate the skills of DAIMAR company with other MARSITE partners 4) To share the collected information with the other tasks MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Contractual Deliverables 13 D8.1) Periodic reports on repeated deployments of autonomous instruments: [Month 14, 20, 26] D8.2) Report on high-resolution micro-earthquake characterization using cabled OBS data and improved velocity, 3D model: [Month 12] D8.3) Synthesis report on spectral and statistical analysis of marine multiparameter time series: [Month 34] D8.4) Design of the next generation autonomous, multi-parameter seafloor instrumentation: [Month 30] MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
AGENDA 14 • URANIA CRUISE in september 2013 • MARSITECRUISE with R/V Pourquoi pas? in 2014 • Completion of research work • Completion of technological/engineering work MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
URANIA CRUISE : MARMARA-2013 15 URANIA (CNR, Italie) 3-D kinematic studies of seismogenic faults along the NAF in the Sea of Marmara and the Gulf of Saros (NE Aegean Sea) Integrated Geophysical/Gas- geochemical studies of “hot spots”, where gas-emission associated to active fault segments were observed (i.e., the Gulf of Izmit) Deployment of seafloor observatories (SN4 and others) MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
16 MARSITE CRUISE LEG-1 MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
MARSITE CRUISE LEG-1 17 (Zoom on Geodetic experiment) MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
MARSITECRUISE Proposal Sept. 2012 18 Leg2. Victor ROV planning MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
Interactions with other WPs : -WP2 (integration with land data) - WP3 (land geodesy) - WP7 (submarine fault activity assement) MARSITE KICK-OFF MEETING ISTANBUL, December, 19-20, 2012 WP8 Presentation
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