WP 4.4 Deformation model for the June 2000 earthquakes from joint  interpretation of GPS, INSAR and borehole strain data

Start date or starting event:

M0

Lead contractor:

NVI

Participants:

NVI, IMOR, SIUI, CNRS-UMR 5562

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Objectives:

1. To evaluate the three-dimensional co-seismic deformation field

associated with the June 2000 earthquakes.

2. To derive a deformation model for the earthquakes based on joint

interpretation of the all the available geodetic data.

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Inputs:

1. Data from CGPS network.

2. Network GPS measurements.

3. Data from a network of borehole strainmeters.

4. Raw SAR data from ERS.

5. Software for analyzing above data.

Methodology / work description:

Co-seismic deformation field of the June 17 and June 21 earthquakes has  been mapped with both network GPS and InSAR.  Some observations from  continuous GPS and borehole strainmeters  do also exist.  Initial interpretation  of each dataset is already completed with simple dislocation models.

Within this workpackage we will develop a unified deformation model based  on all the available geodetic data.  An elaborate model calling for  distributed slip along the fault plane will be determined, using two step inversion.  We will first solve for non-linear model parameters (the fault  geometry) using simulated annealing and then estimate the fault slip  distribution with linear least squares.

The distributed slip model based on geodetic measurements will be an  important element into a unified model for the earthquakes.

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Deliverables including cost of deliverable as percentage of total cost of the proposed project:

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Milestones: Delivery of the above items at the date indicated.