12 month report on wp2: tsunami source characterisation nearest 12 month meeting marrakech, october...

12 Month Report on 12 Month Report on WP2: WP2:

Tsunami source Tsunami source characterisationcharacterisation

Nearest 12 Month MeetingNearest 12 Month Meeting Marrakech, October 25-26, 2007

WP Leader:

Overall objective

Characterisation of the tsunami source areas based on definition of the seismic structure to relate earthquake and tectonic structures, specially deep decollement surfaces

Starting point

State of knowledge concerning location, geometry and characteristics of main active, potentially tsunamigenic faults identified in the area based on WP1 tectonic map.

Existing data : MCS legacy data acquired in the last ~15 years in the area (especially IAM, Rifano, SISMAR, and SWIM)

Nearest 12 Month MeetingNearest 12 Month Meeting Marrakech, October 25-26, 2007Objective and starting

pointObjective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

(1) Mapping deep crustal and upper mantle structure to test geodynamic models;

(2) Determining crustal-scale geometry of main fault surfaces accommodating plate convergence;

(3) Relocating local seismicity that will be recorded in WP3, relate earthquake activity and tectonic strain;

(4) Constraining physical properties of structural domains and tectonic features.

Goals

Workplan

1) Re-process key MCS profiles across most relevant structures until pre-stack depth migration;

2) Acquire, process and model new WAS data along “some” profiles combining OBS and landstations.

Nearest 12 Month MeetingNearest 12 Month Meeting Marrakech, October 25-26, 2007Workplan and

goalsObjective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

Nearest 12 Month MeetingNearest 12 Month Meeting Marrakech, October 25-26, 2007Progress towards

objectivesMeetings:

BARTOLOMÉ, R., GRÀCIA, E., RUBIO, E., DAÑOBEITIA, J.J., TERRINHA, P., AND SWIM-2006 CRUISE PARTY, (2006). New multichannel seismic data imaging of the western part of Gulf of Cádiz (SW Iberian Margin): The SWIM-2006 cruise. Third EUROMARGINS Conference, Bologna (Italia), 4-7 October (Poster).

MARTÍNEZ, S., GRÀCIA, E., BARTOLOMÉ, R., TERRINHA, P., BIROUK, A., DAÑOBEITIA, J.J., SALLARÈS, V., and SWIM-06 CRUISE PARTY (2007). Tectonics of the Coral Patch Ridge area and adjacent Horseshoe and Seine Abyssal Plains (Gulf of Cadiz) based on new multichannel seismic data. 1st Moroccan Association of Petroleum Geologists Conference, Marrakech (Morocco), 28-31 October.

Staff:

• A graduate student (Sara Martínez) hired @CSIC to realize a PhD thesis on SWIM MCS/Nearest WAS data

• A graduate student (Sergi Ventosa) hired @CSIC to develop signal processing filters adapted to WAS data

• A post-doc will be hired @UBO to work with Nearest MCS/WAS data (?)

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

Task 2.1 Reprocessing and pre-stack depth migration of existing MCS data


2006 Kickoff Meeting: Pre-selected key profiles from IAM, Rifano,

SISMAR, SWIM to be (re-)processed until PSDM

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

CSIC personnel: E. Gràcia, S. Martínez R. Bartolomé, V. Sallarès

Progress towards objectives

SWIM-SWIM-20062006

SurveySurvey


• CSIC concentrated on SWIM-06 data acquired in June 2006 (PI E. Gràcia). RB, SM have pre-processed 16 profiles

Task 2.1 Activities

• SM focused on SW08-SW16 across the Coral Patch Ridge and active structures of Seine and Horseshoe Abyssal plains• RB focused on SW01-SW07 crossing the Horseshoe fault to the accretionary wedge and lineation 1

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3


Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3


Task 2.1 Activities• 4 profiles have been selected for PSDM : SW2, SW7, SW13, SW16

•This is being done now in Geomar within EU-LSF program



Task 2.1 ActivitiesUniversité de Bretagne Occidentale (UBO) :

• Providing a database of processed and time-migrated MCS lines of Sismar and DelSis surveys. Three were PSDM (Sis-4, Sis-16 and Sis-22)

•Providing HR (Chirp) data from the DelSis survey ;

•Acquire and provide new HR (sparker) data on the SW Spanish and NW Moroccan platforms (July-Aug 2007, NOMADS cruise, PI P. Leroy)

Other?

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3



Task 2.1 Barchart

Task\Month 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

Task 2.1 Provisional

D4

Task 2.1 Actual

D4

D4 : Prestack depth-migrated MCS profiles

Ok for CSIC on SWIM

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

WP3



Task 2.2 Wide-angle reflection/refraction acquisition experiment

•Application for R/V Hesperides and funding from Spanish agencies for a WAS cruise sent in August 2006

Acquisition of three ~200 km WAS lines with ~25 OBS•Application granted in November 2006 and dates confirmed in May 2007

18 days: between Oct 16th and Nov 2nd, 2008

Nearest-Seis Nearest-Seis 20082008

SurveySurvey

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

CSIC personnel: E. Gràcia, S. Martínez, S.Ventosa, R. Bartolomé, V. Sallarès


Nearest 12 Month MeetingNearest 12 Month Meeting Marrakech, October 25-26, 2007Progress towards

objectives

(1) Application for 20 Geomar OBS

(60 deployments) sent to EU-LSF in May 2007

Failed : money runout

Task 2.2 Activities

Getting Getting OBS?OBS?

(2) Bid to acquire Spanish OBS pool started in February 2007

Ok : 17 Scripps L-Cheapo SP OBS should be ready (?) by June 2008


SurveySurvey

(3) UBO applied for UBO/Ifremer OBS

Ok : 7 UBO + 17 Ifremer MicrOBS reserved for Nearest-Seis…

But… budget for insurance, shipping, technicians is lacking!

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

WP3


(4) Possibility of renting Geomar (or GeoPro) OBS explored

20 OBS/60 deploy cost ~120 k€

Task 2.2 Activities

Getting Getting OBS?OBS?


SurveySurvey

(5) Possibility for sharing rental expenses with Geomar explored

Add scientific value to Nearest:

go into FWT in one profile (?)(6) Other (ex. FCUL)?

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3



Task 2.2 Barchart

Task\Month 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36


D5 M3

Task 2.2 Actual

D5 M3

D5 : Cruise report

M3 : End of processing and experiments at sea

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3



Task 2.3 Processing, modelling and interpretation of wide-angle seismic dataActivity

Barchart

Task\Month 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36


D6M4

Task 2.3 Actual

D6M4

D6: Velocity and density models

M4: End of OBS modelling

Sergi Ventosa developed two filters (polarization and lateral coherency-based) to enhance S/N in WAS data

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3



Objective

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Task 2.2

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Planning Y2

WP3

Planning Year 2

Activitiy summary table

2.1 A0 Interpretaton of SWIM MCS profiles

CSIC (E.Gracia, V. Sallares)

From November 2007 on

2.2 A1 Close inventory of OBS available for cruise

CSIC (V. Sallares) UBO (M.-A. Gutscher)ISMAR (N. Zitellini)FCUL (L. Matias)

March 2008

2.1 A2 End of PSDM migration of MCS data

CSIC (E.Gracia, V. Sallares)UBO (M.-A. Gutscher)ISMAR(?)

April 2008

2.1 A3 Collection of PSDM migrated MCS profiles

CSIC (E.Gracia, V. Sallares)UBO (M.-A. Gutscher)ISMAR(?)

May 2008

2.2 A4 Final discusion/decision on Nearest-Seis WAS profiles and personnel involved in the cruise

CSIC (E.Gracia, V. Sallares) UBO (M.-A. Gutscher)ISMAR (N. Zitellini)FCUL (L. Matias)

May 2008

2.2 A5 Analysis of SISMAR OBS data

CSIC (V. Sallares) June 2008

2.2 A6 Source design for Nearest-Seis

CSIC (V. Sallares) July 2008

2.2 A7 Preparation/testing of material for Nearest-Seis survey

CSIC (V. Sallares) September 2008

2.2 A8 Nearest-Seis survey CSIC (V. Sallares) October 2008


Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

Planning Year 2

Critical aspects :

• Selection of PSDM profiles must be closed. CSIC > SWIM, UBO > SISMAR. What about Rifano and IAM?• We must ensure having enough OBS to perform the experiment (minimum 20; ideal 40). • Preferable not having many different types > logistical complications, limited spacing• WAS profiles must be selected

Possible obstacles :

• Not having (enough) OBS.• Poor acquisition results (weather conditions, other...)

Special notes :

•We propose to organize the next (18 month) meeting next May in Barcelona to discuss about cruise planning


Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

1) Meeting with TopoIberia team leader J. Gallart (CSIC-Barcelona), who is deploying a BB network in SW Iberia

Sharing data recorded by BB OBS (Nearest) and landstation (TopoIberia) networks?

CSIC WP3 Activities

WP3

CSIC WP3 Activities


2) Participated in MVSEIS MCS survey with 4.5 km streamer of L’Atalante (IP L. Somoza) in September 2007 to ensure shooting over BB network

Not allowed to go North from 36º!

WP3

Objective

Workplan

Progress

General

Task 2.1

Task 2.2

Task 2.3

Planning Y2

WP3

12 month report on wp2: tsunami source characterisation nearest 12 month meeting marrakech, october...

Documents

month meeting marrakech

marrakech morocco

month report

kickoff meeting

planning y2wp3nearest

planning y2wp3progress

planning y2wp3task

swim mcsnearest