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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
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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
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Areas of contrasting behavior along the San Andreas Fault (from Allen, 1968) Carrizo Plain
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1906 M7.8 San Francisco Earthquake Beginning of modern earthquake science
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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 http://quake.wr.usgs.gov/info/1906/im ages/fenceoffset_big.html
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“Reid’s elastic rebound hypothesis http://quake.wr.usgs.gov/info/1906/reid.html
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http://www.matter.org.uk/matscicdrom/manual/di.html Edge dislocation Screw dislocation Dislocation: simple idealization of displacement discontinuity in continuous body
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Idealization of brittle crust with embedded strike slip fault (Thatcher, 1990)
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Strike-slip parallel displacements from simple screw dislocation model (Thatcher, 1990)
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1906 coseismic displacements
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Best fit depth: 7000 m
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Interseismic motion along the San Andreas Fault System (max arrow length=~50mm/yr relative to stable North America) Noriega, et al. 2006 ; see also Schmalzle, et al., 2006 Thatcher, 1990 Plate Boundary Observatory velocity field
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Young, et al., 2001
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