nga simulations for hw effects...hw scaling cases • dip dependence – m6.5 scenarios (ztor = 5...
TRANSCRIPT
2004 NGA Simulations for HW Effects
N. Abrahamson Nov 29, 2011
Reverse Slip Scenarios Event Name
Mag Area
(km^2) W (km) L (km) Dip
Top of Rupture
(km) RA 6.5 324 18 18
30 5
RB 6.5 324 18 18 45
0
RC 6.5 324 18 18 45
5
RD 6.5 324 18 18 45
10
RE 6.5 324 18 18 60
5
RF 7.0 1024 32 32 30
0
RG 7.0 1008 28 36 45
0
RH 7.0 1008 21 48 45
5
RI 7.0 989 23 43 60
0
RJ 7.5 3160 40 79 30
0
RK 7.5 3164 28 113 45
0
RL 7.8 6320 40 158 30
0
HW Scaling Cases
• Dip Dependence – M6.5 Scenarios (ZTOR = 5 km)
• RA (30), RC (45), RE (60) – M7.0 Scenarios (ZTOR=0 km)
• RF (30), RG (45), RI (60)
• Magnitude Dependence – 30 degree dip (ZTOR = 0 km)
• RF (M7.0), RJ (M7.5), RL (M7.8) – 45 degree dip (ZTOR = 0 km)
• RB (M6.5), RG (M7.0), RK (M7.5)
M6.5 Scenario Stations
M7.0 Scenario Stations
Dip=30, Scenario Stations
Dip=45, Scenario Stations
Simulation Methods
• Three Kinematic Finite-Fault Simulations – Pacific Engineering and Analysis (Silva) – University of Nevada, Reno (Zeng) – URS (Somerville / Graves)
• Multiple Realizations for each scenario – PEA: 15 or 30 realizations – UNR:12 realizations – URS: 12 realizations
M6.5, Dip=30, ZTOR=5
M6.5, Dip=45, ZTOR=0
M6.5, Dip=45, ZTOR=5
M6.5, Dip=45, ZTOR=10
M6.5, Dip=60, ZTOR=5
M6.5, Dip=30, ZTOR=0
M7.0, Dip=45, ZTOR=0
M7.0, Dip=45, ZTOR=5
M7.0, Dip=60, ZTOR=0
Discussion
• Overall, similar strong scaling for HW effects seen for all three methods
• What additional cases are needed for DCPP applications? – What happens for M< 6.5? – Better coverage of stations over the fault? – Better coverage past edge of rupture (Rx)