Conveners: C.B. Crouse and Tom Jordan
Dates: May 4, 2015 (10:00 - 15:30)
Location: SCEC Boardroom, USC, Los Angeles

SUMMARY: The SCEC Committee for Utilization of Ground Motion Simulations (or "UGMS Committee") is tasked to 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. This project is 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.

Presentation slides may be downloaded by clicking the links following the title. PLEASE NOTE: Files are the author’s property. They may contain unpublished or preliminary information and should only be used while viewing the talk.

Monday, May 4, 2015

PARTICIPANTS

*Remote Participants

PSHA HAZARD CURVES & MCER CURVES
Map of MCER Study 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.
	PSHA Hazard Curves		MCER Curves
Study Sites (KML file)	CyberShake v14.2	CyberShake v15.4	CyberShake v14.2	CyberShake v15.4
CCP Center City Plaza	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
COO Compton	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
LADT Los Angeles Downtown	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
LAPD Lake Palmdale	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
p22	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
PAS Pasadena	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
s429	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
s603	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
s684	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
s758	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
SBSM San Bernardino Strong Motion	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
SMCA Santa Monica Civic Auditorium	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
STNI 710/90 Interchange	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results
WNGC Whittier Narrows Golf Course	2s, 3s, 4s, 5s, 7.5s, 10s	2s, 3s, 4s, 5s, 7.5s, 10s	Probabilistic MCER Deterministic MCER Combined Results Overall Results	Probabilistic MCER Deterministic MCER Combined Results Overall Results

MCER MAPS (CYBERSHAKE V14.2)

Period	Probabilistic MCER	Deterministic MCER	Deterministic Lower Limit	Combined MCER results
3 Second RotD100
5 Second RotD100
10 Second RotD100

GMPE COMPARISON MAPS (CYBERSHAKE V14.2)

Period	CyberShake Combined MCER	GMPE Combined MCER	Ratio (CyberShake/GMPE)
3 Second RotD100
5 Second RotD100
10 Second RotD100

CYBERSHAKE ACTION LIST

1. Plan CyberShake UCERF3 with initial runs 2015
2. Run forward simulation of selected CyberShake ruptures to evaluate assumption of linear ground motion response.
3. Clarify Deterministic MCER calculations with USGS.
4. With Rob, modify hypocenter location probabilities to taper few hypocenters near top of fault.
5. Discuss with Jacobo the large displacement he’s seeing in MCER results.
6. Define a procedure for “approving” CyberShake result, short of publishing. Maybe define a series of stages to put a computational result through as they get checked
7. Send out notification when we “certify” CyberShake 15.4 results
8. Send out notification when we complete and certify CS 15.4 all sites and maps.
9. Consider adding Alhambra Site City Emergency Response Center 10 Story Steel moment frame building.