Download Techniques in Active Tectonic Study

Pelatihan :
Techniques in Active Tectonic Study
Juni 20-Juli 2, 2013
Instruktur: Prof. J Ramon Arrowsmith (JRA)
Dari Arizona State University (ASU) - US
Tempat Pelaksanaan:
Ruang Pangea, Laboratorium Gempabumi (LabEarth) –
Puslit Geoteknologi LIPI dan Kuliah lapangan akan dilakukan
disekitar Sesar Lembang, Jawa Barat.
* Lebih jelas baca TOR/KAK dan daftar acara
Earthquake cycle exploration using 2D
dislocations: strike-slip
Outline of this lecture
• Motivations from the San Andreas Fault
• Basic ideas of dislocations
• Strike-slip parallel displacements from simple
screw dislocation model (Thatcher, 1990)
• A few examples
• Application to Izmit Earthquake
Areas of
contrasting
behavior along the
San Andreas Fault
(from Allen, 1968)
Carrizo Plain
1906 M7.8
San
Francisco
Earthquake
Beginning of
modern
earthquake
science
1906 earthquake
surface rupture.
8’ fence offset above
http://mnw.eas.slu.edu/Earthquake_C
enter/1906EQ/1906thumb.html
And
http://quake.wr.usgs.gov/info/1906/im
ages/fenceoffset_big.html
“Reid’s
elastic
rebound
hypothesis
http://quake.wr.usgs.gov/info/1906/reid.html
http://www.matter.org.uk/matscicdrom/manual/di.html
Edge dislocation
Screw dislocation
Dislocation: simple idealization of displacement
discontinuity in continuous body
Idealization of
brittle crust
with
embedded
strike slip
fault
(Thatcher,
1990)
Strike-slip parallel
displacements from
simple screw dislocation
model (Thatcher, 1990)
1906 coseismic
displacements
Best fit depth: 7000 m
Interseismic motion along the
San Andreas Fault System
(max arrow length=~50mm/yr relative to stable North America)
Schmalzle, et al., 2006
Plate Boundary Observatory velocity field
Noriega, et al. 2006; see also
Thatcher, 1990
Young, et
al., 2001