SSHAC Workshop 1 – Critical Issues
and Data Needs
Next Generation Attenuation for
CENA (NGA-East)
SSHAC Workshop 1 – Critical Issues
and Data Needs
November 15-18, 2010
University of California, Berkeley
Agenda (PDF fle – 480 KB)
With funding from the
US Nuclear
Regulatory Commission (NRC),
Electric Power Research Institute (EPRI) and
US
Department of Energy, the Pacific Earthquake
Engineering Research Center (PEER) is coordinating a
comprehensive multidisciplinary program to develop Next
Generation Attenuation Relationships for the Central and
Eastern North-America (NGA-East).
As part of this research program, PEER will
coordinate a large number of public workshops over the
life of the project. The purposes of such workshops are
to collect feedback from the earthquake community and
inform the participants about the on-going technical
activities. NGA East is treated as a SSHAC (Senior
Seismic Hazard Analysis Committee) Level 3 program. See
the
Open-File Report 2009-1093 (PDF file – 992 KB) for a
summary of the SSHAC process.
This is the first of several SSHAC Workshops. The
purpose of the workshop is to:
- Identify the technical issues of highest
significance to the hazard analysis, and
- Review the available data and identify the data,
information and/or additional work that will be
needed to address those issues.
Workshop Attendance
Over 70 participants attended the workshop free of
charge at the Berkeley International House.
International House Visitor
information (Location, Maps, Parking, Public
transportation, airport links, etc.). Nearly 25
participants attended virtually via PEER’s live video
conferencing service, where participants could watch the
presentations on their personal computer while hearing
the presenter and discussion period via telephone. This
virtual service was provided free of charge to attendees
participating from both international and US locations.
Videos and PDFs for
the all presentations
Monday, November 15
All documents below are
in PDF format.
November 15, 2010 (9:00-12:00) Project plan &
critical issues
November 15, 2010 (1:00-4:30) Review of the
preliminary database of recorded ground motions from
Central East North America, and small magnitude data
from California
Tuesday, November 16
November 16, 2010 (9:00-11:00) Discussion of
reference rock definition and issues related to
Kappa by the Geotechnical Working Group
November 16, 2010 (11:15-12:15, 1:00-2:00)
Issues for point source models
November 16, 2010 (2:00-4:30) Methods for finite
fault simulations
| 2:00-3:00 |
Methods considered: description of
selected methods (2.Yuehua
Zeng; Sim WG) |
| 3:00-3:30 |
Discussion |
| 3:30-3:45 |
Break |
| 3:45-4:00 |
Discussion: Capture of representative
methods |
| 4:00-4:30 |
Summary of today’s key issues (3.Norman
Abrahamson) |
| 4:30-5:00 |
Observers (Sponsors and Public) Comments |
| 5:00-5:30 |
PPRP-TI and JMC Debriefing (closed door
meeting) |
Wednesday, November 17
November 17, 2010 (9:00-11:00) Range of crustal
property inputs for finite fault simulations
| 9:00-10:00 |
Alternative regionalization and crustal
structures 1D and Q for FF simulations (1.Martin
Chapman; Path WG) |
| 10:00-10:45 |
Discussion |
| 10:45-11:00 |
Break |
November 17, 2010 (11:00-12:15) Range of inputs
of geometrical spreading and Q for point source
simulations
| 11:00-11:45 |
Alternative regionalization, geometrical
spreading, Kappa and Q for PS simulations;
with focus on alternative geometrical
spreading in first 40km (2.Martin
Chapman,
3.Jack Boatwright; Path WG) |
| 11:45-12:15 |
Discussion |
| 12:15-1:00 |
Lunch |
November 17, 2010 (1:00-4:30) Range of input
stress drops for point source simulations
| 1:00-2:30 |
Stress drop ranges from past SCR
earthquakes, issue in Saguenay earthquake
and magnitude-dependent or constant (1.Gail
Atkinson,
2.Bob Darragh/Walt Silva,
3.Annemarie Baltay/Greg Beroza; Sim WG)
– What range is needed for the simulations
to cover all alternative models? |
| 2:30-3:00 |
Issue of correlation of parameter (e.g.
stress drop, geometrical spreading and
Kappa): results from past studies (4.Dave
Boore/Ken Campbell; Path and Geotech WGs) |
| 3:00-3:15 |
Break |
| 3:15-4:00 |
Discussion: do these values to be used
in the simulations capture the range to
consider? What additional work should be
done regarding the correlation of
parameters? |
| 4:00-4:30 |
Summary of today’s key issues (5.Norman
Abrahamson) |
| 4:30-5:00 |
Observers (Sponsors and Public) Comments |
| 5:00-5:30 |
PPRP-TI and JMC Debriefing (closed door
meeting) |
Thursday, November 18
November 18, 2010 (9:00-12:00) Selection of
alternative methods of generating finite source
inputs
| 9:00-9:45 |
Dynamic rupture approach (Ralph
Archuleta (No slides); Sim WG) Inputs to
dynamic rupture models – SCEC 100 runs
project (1.Ruth
Harris,
2.Norman Abrahamson) Kinematic source
inputs from dynamic rupture models (3.Ralph
Archuleta) |
| 9:45-10:30 |
Discussion |
| 10:30-10:45 |
Break |
| 10:45-11:30 |
Summary of currently available kinematic
rupture generators (4.Robert
Graves) |
| 11:30-12:00 |
Discussion: is the list exhaustive? |
| 12:00-1:00 |
Lunch |
November 18, 2010 (1:00-3:00) Sigma Working
Group
| 1:00-2:00 |
Summary of the Sigma WG plan (1.Linda
Al Atik; Sigma WG) |
| 2:00-3:00 |
Discussion: have we captured all the
alternatives? |
| 3:00-3:15 |
Break |
November 18, 2010 (3:15-4:00) Vertical ground
motion
November 18, 2010 (4:00-4:30) Identification of
other critical Issues and data needs
| 4:10-4:30 |
Summary of today’s key issues (4.Christine
Goulet) |
| 4:30-5:00 |
Observers (Sponsors and Public) Comments |
| 5:00-5:10 |
Week summary overview (5.Christine
Goulet), closing remarks (Yousef
Bozorgnia) |
| 5:10-onward |
PPRP-TI and JMC Debriefing (closed door
meeting) |
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