DPC High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy S5S5S5S5 Roma 24/03/ 2010 S5 Project High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy S5 Project High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy project web site: Task 2 The Messina Strait test sitehttp://dpc-s5.rm.ingv.it/

DPC High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy S5S5S5S5 Roma 24/03/ 2010 PHASEIII SEMESTER1234 Task/R U WP 2/32.1First OBS deploymentOBS recovery Integration of OBS data into the archive Second OBS deployment and test of the acoustic link OBS recovery Integration of OBS data into the archive 2/32.2Development of procedures to have all data in the same format Integrated archiveEarthquake refined locationsIntegrated archive Earthquake refined locations Correlation of seismicity and active faults 2/32.3Comparison of different available codes Implementation of a preferred code to evaluate seismic anisotropy parameters automatically Events selection and parameters estimation: done on some events of L ’ Aquila sequence. Appication of the code to a selected data base of local subcristal events Interpretation of the results in terms of fracture field and of possible temporal variations of the stress field 2/32.4Geodetic surveyEvaluation of the velocity field from all the available data Computation of the horizontal strain-rate field and of the inter- seismic strain loading and deep geometry of the 1908 Messina fault. Interaction with other WP and interpretation of the results 2/42.5Preparation of the datasets needed for analyses of earthquakes occurring during Prosecution and conclusion of FM computations for earthquakes Hypocentral locations and FM computations with the additional contribution by the INGV experiment data (first phase) Hypocentral locations and FM computations with the additional contribution by the INGV experiment data (second and last phase) 2/42.5Hypocentral locations and start of focal mechanism computations with the different techniques Integration of the computed FMs with the FMs available in the existing catalogs and in the major literature Start of computations of stress and strain fields Preparation of the final integrated database and last phase of stress/strain computations. Comparison of the results with the findings of the other RUs for final evaluations

DPC High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy S5S5S5S5 Roma 24/03/ 2010

DPC High-resolution multi-disciplinary monitoring of active fault test-site areas in Italy S5S5S5S5 Roma 24/03/ 2010 activitiesOPEN ISSUES - Observations and requests Task/RUWP 2/32.1 OBS deployments Data integration Test of acoustic link (?) The second deployment were delayed by problems with sensors( now in the second deployment we adopt another sensor type); this was an important test for the development of the Italian OBS! Will we do the acoustic link test before the end of May? The second OBS recovery is planned for October /32.2 Integrated data archive Refined locations The integration of temporary stations and permanent networks in a continuous SEED archive is an extraordinarily important goal of this project ( it opens data to all the University and global scientific community. The analysis of the data was delayed by the occurrence of the L’Aquila earthquake, refined locations will be done after the project closing. 2/32.3 Automatic code to evaluate seismic anisotropy Analysis of local crustal events The code (Anisomat) is ready was tested in comparison to manual analysis and 2 different automatic codes ( Spy from INGV-OV; and Sheba from Bristol university). Selection parameter on the wave forms are really important for the reliability of the results! It will be applied to a selected subcrustal dataset, for the crustal data we wait for the refined locations 2/32.4 Velocity and Strain fields of the area. Modelling of the 1908 source The fields were computed and published. The Messina strait region is undergoing extension. The extension is not concentrated across the strait. The new data collected are available (where?). All the old campaigns will be available to the scientific community? The modelling suggests that the are not enough constrains to define the source of 1908 ( the DISS box or a fault west dipping in Calabria have similar fits). 2/42.5 Hypocentral locations and Focal Mechanisms Map of stress tensor orientation. The CAP technique is appropriate for FM computation down to M 2.5! The integration of the INGV data is a little late but we are doing it. Stress tensor was computed and will be redone with new data