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Primary Author Information
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| Name |
Ivo Oprsal |
| Affiliation |
Swiss Seismological Service, ETH Zurich, on leave from Faculty of
Mathematics and Physics, Charles University in Prague, Czech Republic |
| Co-Author
Information |
| Co-Author
- 1 |
Name |
Donat Faeh |
| Affiliation |
Swiss Seismological Service, ETH Zurich |
| Co-Author
- 2 |
Name |
Domenico Giardini |
| Affiliation |
Swiss Seismological Service, ETH Zurich |
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Abstract Information
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| Abstract Number |
2 |
| Abstract Title |
THREE DIMENSIONAL FINITE-DIFFERENCE MODELING OF STRONG GROUND-MOTION
SITE EFFECTS DUE TO THE FINITE-EXTENT SOURCE - 1356 BASEL EARTHQUAKE,
UPPER RHINE GRABEN |
| Presentation Style |
POSTER |
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Abstract Submission
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| Speaker |
Primary Author
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| Abstract Body Preview |
| The Basel earthquake of October 18, 1356 (I0=IX, M=6.9) is
considered to be one of the most disastrous European events. The Basel
area - Upper Rhine Graben - belongs today to seismically modest regions.
Reducing the seismic risk by anti-seismic design needs the knowledge of
the strong ground motion. The lack of the real data may be effectively
estimated by numerical modeling using the finite differences (FD).
The 3D explicit FD method is designed for topography models on irregular
rectangular grids. The single-template approximation to the hyperbolic
partial differential equation (PDE) is solved explicitly in the spatial
and the time domain. The boundary conditions at the interfaces (including
the topographic free surface) are satisfied via a treatment of the
material parameters. The medium is Hooke's isotropic inhomogeneous body,
with a particle-velocity dependent term added to the PDE to approximate
viscoelastic behavior of the medium.
The 3D FD modeling is computed for the recently established P and S-wave
velocities structure of the Basel area (Kind, 2002), including the
topography. The relatively simple finite-extent source features are
combined with strong site effects. The finite-extent source is adjacent to
the free surface, since the fault has been recognized through trenching on
the Reinach fault. Several rupture histories are tested because the 1356
Basel earthquake source features are not possible to be determined. The
macroseismic information of the Basel area as well as recently established
2D computations serve as a comparison to the results. |
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Symposium or Workshop (First Preference)
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| Symposium or Workshop (First Preference) |
SS04 |
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Symposium or Workshop (Second Preference)
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| Symposium or Workshop (Second Preference) |
SS02 |
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Keyword One
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7212 |
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Keyword Two
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| Keyword Two |
7223 |
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Keyword Three
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| Keyword Three |
7260 |
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Is a Student Author presenting the paper?
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| Student Paper |
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Equipment Requested for Presentation
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| Equipment Requested for Presentation |
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Notes
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| Notes |
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