ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    A Physics-Based Simulation of the 2003 Tokachi-oki, Japan, Earthquake to Predict Strong Ground Motions (2009)
    Seismological Society of America
    Details
    Publication Date: 2009-11-23
    Description: We demonstrate the usefulness of physics-based integrated simulation of subduction earthquakes for making strong-motion predictions in a deterministic way. We estimated strong ground motions caused by a 2003 Tokachi-oki-like earthquake, taking into account the stress accumulation due to tectonic loading, dynamic rupture propagation due to the failure of asperities, and generation of strong ground motions. Then we compared the synthetic seismograms with those observed during the 2003 Tokachi-oki earthquake (M 8.0) to confirm that simple but physically reasonable modeling can obtain a reasonable estimate of ground motions of large earthquakes in view of peak ground velocities, duration, and velocity response spectra. It should be emphasized that this procedure is quite important to constructing a physics-based earthquake generation model that would be available for the prediction of strong ground motions and mitigation of disasters due to future large earthquakes. And this feature will not be achieved by traditional experience-based kinematic modeling approaches. Of course, this simulation includes quite a few uncertain parameters, but the parameter search experiment itself will help us construct useful scenarios of possible disasters we will suffer in the future. Hypocenter location is one of the most uncertain parameters in this simulation. We investigated the effect of uncertainty of hypocenter location on the computed strong motions quantitatively. The result shows that the variation in response spectra of ground velocities is within a factor of 2 at 3.3 sec and a factor of 4 at 15 sec, which is not serious compared to the local site amplification effects.
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
    Published by Seismological Society of America
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Quantifying Natural Fault Geometry: Statistics of Splay Fault Angles (2009)
    Seismological Society of America
    Details
    Publication Date: 2009-02-01
    Description: We propose a new approach to quantifying fault system geometry, using an objective fit of the fault geometry to a test function, specifically here a fault branch. Fitting a Y-shaped object using a cost function to dextral faults in California, we find a number of significant results arising from use of a a systematic, objective, quantitative approach. (1) The largest angle of the branch structure is generally very close to 180 degrees , implying that the branch is a splay fault off the primary through-going fault. (2) The distribution of the smallest angle, the splay angle, has a peak near + or -17 degrees , symmetric about the primary fault. (3) These features appear independent of scale. These results are not yet explained by any theory, and they pose new questions and constraints for the physics of fault system formation and behavior.
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
    Published by Seismological Society of America
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...