Download What is DISS? (1) INGV - Sezione di Sismologia e - Earth

European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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
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
seismogenic layer
surface rupture
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 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)
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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.
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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 threedimensional 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.
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
3D View of an Individual Source and its Parameters
Fault projection to ground surface
UL
SL
Strike
LL
UR
SR
LR
Fault plane
Rake
Dip
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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
This is a branching point,
NOT a segment boundary
Dip max
Effective
Depth
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
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
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
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.
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Where is DISS?
DISS is available online @
http://www.ingv.it/DISS/
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy
European Geosciences Union General Assembly 2006 Vienna, Austria, 02 – 07 April 2006
Examples of earthquake geology studies, analyses
and applications of DISS @ EGU
See our posters on ...
earthquake geology of NE Italy
earthquake geology of S Italy
earthquake geology of offshore S Italy
TS4.3
TS4.3
TS4.3
XY0933
XY0953
XY0938
regional seismotectonic view of Italy
TS4.3
XY0944
application of DISS to CFF analysis
application of DISS to tsunami scenarios
TS1.6 XY0874
NH6.01 XY0626
You can download this presentation from http://www.earth-prints.org/
INGV - Sezione di Sismologia e Tettonofisica, Roma, Italy