CyberShake Study 20.5

CyberShake Study 20.5 is a CyberShake study in Southern California which uses Graves & Pitarka (2019) and includes stochastic high frequencies using the Graves & Pitarka high-frequency module from the SCEC Broadband Platform.

Output Data Products

Seismograms

• Deterministic (dt=0.05, nt=8000)
• Broadband (dt=0.01, nt=40000)

Intensity Measures

Values for database

We will calculate and store the following intensity measures in the database.

For deterministic seismograms:

• Store RotD50, RotD100 at the following 7 periods:

 10, 7.5, 5, 4, 3, 2, 1

For broadband seismograms:

• Store RotD50, RotD100 in the database at the following 21 periods:

 10, 7.5, 5, 4, 3, 2, 1, 0.75, 0.5, 0.4, 0.3, 0.2, 0.1, 0.075, 0.05, 0.04, 0.03, 0.02, 0.01, PGA, PGV

Additional values

We will calculate intensity measures at additional periods to be stored on disk.

For deterministic seismograms:

• Calculate RotD50, RotD100 and store on disk at the following 25 periods:

 20, 15, 12, 10, 8.5, 7.5, 6.5, 6, 5.5, 5, 4.4, 4, 3.5, 3, 2.8, 2.6, 2.4, 2.2, 2, 1.7, 1.5, 1.3, 1.2, 1.1, 1

For broadband seismograms:

• Calculate RotD50, RotD100 and store on disk at the following 68 periods:

 20, 15, 12, 10, 8.5, 7.5, 6.5, 6, 5.5, 5, 4.4, 4, 3.5, 3, 2.8, 2.6, 2.4, 2.2, 2, 1.7, 1.5, 1.3, 1.2, 1.1, 1, 0.85, 0.75, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.28, 0.26, 0.24, 0.22, 0.2, 0.17, 0.15, 0.13, 0.12, 0.11, 0.1, 0.085, 0.075, 0.065, 0.06, 0.055, 0.05, 0.045, 0.04, 0.035, 0.032, 0.029, 0.025, 0.022, 0.02, 0.017, 0.015, 0.013, 0.012, 0.011, 0.01, PGA, PGV

We will no longer calculate or store geometric mean.

Durations

Values for database

We will store the following durations in the database for broadband seismograms:

• Acceleration significant duration at 5-75% and 5-95%, for both X and Y

Additional values

We will calculate additional durations to be stored on disk. For both deterministic and broadband seismograms:

• Velocity significant durations for 5-75%, 5-95%, and 20-80% for velocity for both X and Y
• Acceleration significant durations for 20-80% for both X and Y
• Total Arias intensity
• Total cumulative absolute velocity

Hazard Curves

We will calculate deterministic hazard curves at the following frequencies:

10, 5, 3, 2 sec

We will calculate broadband hazard curves at the following frequencies:

10, 5, 3, 2, 1, 0.5, 0.3, 0.2, 0.1 sec