Review of Recommendations for Probabilistic Seismic Hazard Analysis Guidance on Uncertainty and Use of Experts (1997) / Chapter Skim
Currently Skimming:
SEISMIC SOURCE CHARACTERIZATION
SEISMIC SOURCE CHARACTERIZATION
Pages 41-46
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 41... ...
The basic methodology for SSC described in the SSHAC report has been validated by extensive peer review of prior projects in which such a methodology was used. The SSHAC report correctly states that a seismic source is a construct developed for seismic hazard analysis as a means of approximating the locations of earthquake occurrences.
|
From page 42... ...
Similarly, the guidance described in Section 4.4 for the expert elicitation process follows one's acceptance of the decision science methodology laid out in Chapter 3. A notable gap in Chapter 4 of the SSHAC report is the absence of discussion on and guidance for earthquake catalogs.
|
From page 43... ...
Recognizing that earthquake recurrence relationships based on seismicity depend critically on factors such as those described above, EPR] undertook major efforts to address these and other earthquake data base issues, which are still of great importance in PSHA both in principle and in continuing practice.
|
From page 44... ...
The analysis techniques date from the EPR1 program (EPRI, 1989, as cited in the SSHAC report) , but the detailed discussion and examples presented there forcefully demonstrate how the usual assumption of homogeneous seism~city for seismic sources can, under certain predictable cases, significantly affect both the mean seismic hazard and its statistical uncertainty.
|
From page 45... ...
proposes a method for PSHA that uses spatially smoothed representations of historic seism~city instead of seismic source zones to directly calculate probabilistic seismic hazard. Insofar as he demonstrates the capability to produce values of mean seismic hazard similar to those from the more complicated EPR!
|
From page 46... ...
As earth scientists improve their ability to assess t~mevarying earthquake potential on active faults, SSC will evolve correspondingly. Indeed, "t~me-variable seismic hazard" is already a topic of special sessions at geophysical society meetings.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.