Seismogenic active fault zone between 2005 Kashmir and 1905 ...
From mapping faults to delineating seismogenic sources:
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Transcript of From mapping faults to delineating seismogenic sources:
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
From mapping faults to delineatingFrom mapping faults to delineatingseismogenic sources:seismogenic sources:
version 3.0 of the Database of Individual version 3.0 of the Database of Individual Seismogenic Sources (DISS)Seismogenic Sources (DISS)
Roberto Basili and the Roberto Basili and the DISS Working GroupDISS Working GroupGianluca Valensise
Roberto BasiliPaola VannoliSofia Mariano
Pierfrancesco Burrato
EGU06-A-07129; TS4.3-1WE2O-002
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
MotivationsMotivations
Present the largest repository of data on Present the largest repository of data on Earthquake Geology in EuropeEarthquake Geology in Europe
Stimulate discussions on the peculiarities of Stimulate discussions on the peculiarities of the database and its application to seismic the database and its application to seismic
hazard studieshazard studies
Encourage contributions from the community Encourage contributions from the community of European earthquake geologistsof European earthquake geologists
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Hazards Associated with Active Faults
ground shaking
surface deformation
surface rupture
seis
mogenic
layer
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Hazards Associated with Active Faults
ground shaking: happens always but is transientaffects the widest areais responsible for most of the damagemay trigger other geological effects (liquefaction, landslides, secondary ruptures)
surface deformation: happens always and is permanentaffects 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 permanentaffects a limited area (smaller than fault length)may produce significant damagetrigger other geological effects(water ponding, damming)
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
DISS’s HistoryDISS’s History
DISS 1.0DISS 1.0 (2000): (2000):
circulation limited within INGV;circulation limited within INGV;
DISS 2.0DISS 2.0 (2001): (2001):
standalone version (MapInfo) published in standalone version (MapInfo) published in
Annali di GeofisicaAnnali di Geofisica, with CD-ROM , with CD-ROM
(Valensise and Pantosti, 2001);(Valensise and Pantosti, 2001);
DISS 3.0DISS 3.0 (2005): (2005):
web and standalone versions, updated web and standalone versions, updated
semi-annually by DISS WG.semi-annually by DISS WG.
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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.
What is DISS? (1)
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Strike
Dip
Rake
Fault plane
SL
LL
LR
UL
SRUR
Fault projection to ground surface
Bottom depth
Lenght
Wid
th
Top depth
Top edge
Bottom edge
North
3D View of an Individual Source and its Parameters
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Strike min
Strike max
N
N
Dip max
Rake min
Rake max
EffectiveDepth
3D View of a Seismogenic Area and its Parameters
Dip min
branches of the fault system
This is a branching point,NOT a segment boundary
polygon that encloses the projection at the ground surface of an entire fault system
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
DISS content
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Information behind each Seismogenic Source
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
DISS presently contains information on the Italian territory and its surrounding regions but it’s structured to include data from anywhere.
What is DISS? (2)
thematic layers
fault database
regional databases cropped on the fly
theme #1theme #2
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
DISS is expressly devoted to many potential applications in the assessment of seismic hazard at regional and national scale.
What is DISS? (3)
• it represents faults in 3Dit represents faults in 3D
• all its records are fully parameterizedall its records are fully parameterized
• it tends to completenessit tends to completeness
DISS content is ready to use and does not require any further manipulation of fault data by analysts and modelers.
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
DISS is available online @DISS is available online @http://www.ingv.it/DISS/http://www.ingv.it/DISS/
Where is DISS?
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
See our posters on ...
earthquake geology of NE Italy TS4.3 XY0933earthquake geology of S Italy TS4.3 XY0953earthquake geology of offshore S Italy TS4.3 XY0938
regional seismotectonic view of Italy TS4.3 XY0944
application of DISS to CFF analysis TS1.6 XY0874application of DISS to tsunami scenarios NH6.01 XY0626
You can download this presentation from You can download this presentation from http://www.earth-prints.org/http://www.earth-prints.org/
Examples of earthquake geology studies, analyses and applications of DISS @ EGU