From mapping faults to delineating seismogenic sources:

1. EGU06-A-07129;  TS4.3-1WE2O-002 From mapping faults to delineating seismogenic sources: version 3.0 of the Database of Individual Seismogenic Sources (DISS) Roberto Basili and the DISS Working Group Gianluca Valensise Roberto Basili Paola Vannoli Sofia Mariano Pierfrancesco Burrato

2. Motivations Present the largest repository of data on Earthquake Geology in Europe Stimulate discussions on the peculiarities of the database and its application to seismic hazard studies Encourage contributions from the community of European earthquake geologists

3. Hazards Associated with Active Faults ground shaking surface deformation surface rupture seismogenic layer

4. Hazards Associated with Active Faults ground shaking: happens always but is transient affects the widest area is responsible for most of the damage may trigger other geological effects (liquefaction, landslides, secondary ruptures) surface deformation: happens always and is permanent affects a wide area (fault size x2) produce limited damage (critical facilities) trigger other geological effects (stream avulsion, slope instability, tsunami) surface rupture: happens only if fault is not blind but is permanent affects a limited area (smaller than fault length) may produce significant damage trigger other geological effects (water ponding, damming)

5. DISS’s History DISS 1.0 (2000): circulation limited within INGV; DISS 2.0 (2001): standalone version (MapInfo) published in Annali di Geofisica, with CD-ROM (Valensise and Pantosti, 2001); DISS 3.0 (2005): web and standalone versions, updated semi-annually by DISS WG.

6. What is DISS? (1) DISS is a georeferenced repository of tectonic, fault and paleoseismological information. The core objects of DISS are: (1) the individual seismogenic source, a simplified and three-dimensional representation of a fault plane. Seismogenic sources are assumed to exhibit "characteristic" behaviour with respect to rupture length/width and expected magnitude; (2) the seismogenic area, an elongated region containing an unspecified number of aligned seismogenic sources that cannot be singled out. Seismogenic areas are not associated with a specific set of earthquakes or earthquake distribution.

7. 3D View of an Individual Source and its Parameters Fault projection to ground surface SL North UL Strike LL SR Top edge UR Width Top depth LR Rake Fault plane Bottom edge Dip Bottom depth Lenght

8. 3D View of a Seismogenic Area and its Parameters N Strike min polygon that encloses the projection at the ground surface of an entire fault system N Strike max Dip min Rake max Rake min branches of the fault system Effective Depth Dip max This is a branching point, NOT a segment boundary

9. DISS content

10. Information behind each Seismogenic Source

11. What is DISS? (2) DISS presently contains information on the Italian territory and its surrounding regions but it’s structured to include data from anywhere. theme #2 theme #1 thematic layers fault database regional databases cropped on the fly

12. What is DISS? (3) DISS is expressly devoted to many potential applications in the assessment of seismic hazard at regional and national scale. • it represents faults in 3D • all its records are fully parameterized • it tends to completeness DISS content is ready to use and does not require any further manipulation of fault data by analysts and modelers.

13. Where is DISS? DISS is available online @ http://www.ingv.it/DISS/

14. Examples of earthquake geology studies, analyses and applications of DISS @ EGU See our posters on ... earthquake geology of NE Italy TS4.3 XY0933 earthquake geology of S Italy TS4.3 XY0953 earthquake geology of offshore S Italy TS4.3 XY0938 regional seismotectonic view of Italy TS4.3 XY0944 application of DISS to CFF analysis TS1.6 XY0874 application of DISS totsunami scenarios NH6.01 XY0626 You can download this presentation from http://www.earth-prints.org/