Moved:SCEC UGMS Committee Meeting

The SCEC Committee on UGMS (see membership and charter below) will meet on May 12th from 10 a.m. to around 5:30 p.m at USC/SCEC in Los Angeles, CA. At the meeting, Tom Jordan (USC/SCEC) and his team will present details of the CyberShake platform, which has completed long period ground-motion simulations for the Los Angeles region. They will present how model uncertainties have been addressed so far and will show results of probabilistic and deterministic calculations. At the end of these presentations the committee will decide the next steps toward the goal of preparing long period ground motion maps for the Los Angeles region, a task that will be performed in collaboration with the SCEC GMSV TAG committee chaired by Nico Luco (USGS).

SCEC Committee on Utilization of Ground Motion Simulations (UGMS):

Norm Abrahamson (PG&E/UCB)

John Anderson (UNR)

Bob Bachman (R.E. Bachman Consulting Structural Engineers)

Jack Baker (Stanford)

Jacobo Bielak (CMU)

C. B. Crouse (URS, chair)

Art Frankel (USGS)

Rob Graves (USGS)

Ron Hamburger (SGH)

Curt Haselton (CSUC)

John Hooper (MKA)

Charlie Kircher (Kircher & Associates)

Nico Luco (USGS)

Farzad Naeim (J.A. Martin & Associates)

Paul Somerville (URS)

Committee Goal/Charter: Develop long-period response spectral acceleration maps for Los Angeles region for inclusion in NEHRP and ASCE 7 Seismic Provisions and in Los Angeles City Building Code. The maps would be based on 3-D numerical ground-motion simulations, and ground motions computed using latest empirical ground-motion prediction equations from the PEER NGA project. The project would be coordinated with (1) the SCEC Ground Motion Simulation Validation Technical Activity Group (GMSV-TAG), (2) other SCEC projects, such as CyberShake and UCERF, and (3) the USGS national seismic hazard mapping project.

Data of Interest

CyberShake Hazard Maps

Map of CyberShake sites. Purple sites are along a 10 km x 10 km mesh, orange sites are near SCSN broadband stations, and yellow sites are locations of interest.
Site Name	3 second curve	5 second curve
LADT	LADT 3 sec	LADT 5 sec
CCP	CCP 3 sec	CCP 5 sec
P22	P22 3 sec	P22 5 sec
s429	s429 3 sec	s429 5 sec
STG	STG 3 sec	STG 5 sec
s684	s684 3 sec	s684 5 sec
s688	s688 3 sec	s688 5 sec
PAS	PAS 3 sec	PAS 5 sec
s758	s758 3 sec	s758 5 sec
SBSM	SBSM 3 sec	SBSM 5 sec
STNI	STNI 3 sec	STNI 5 sec
WNGC	WNGC 3 sec	WNGC 5 sec
s355	s355 3 sec	s355 5 sec

Rupture Generator comparisons

Hypocenter distribution for source 244, rupture 5 (M6.55, Puente Hills)

Slips for a single realization of source 244, rupture 5 (M6.55, Puente Hills)

Hypocenter distribution for source 128, rupture 1296 (M8.15, Southern San Andreas)