Probabilistic Seismic Hazard Analysis (PSHA)

SESAT-2000 Based Probabilistic Seismic Hazard Analysis

Seismotectonic Source Characterization • Gutenberg–Richter Seismicity • GMPE • PSHA • Hazard Curves • UHRS • Deaggregation

1. Site Information

Project / Site Name

Latitude (°)

Longitude (°)

Vs30 (m/s)

Site Class A B C D E

Exposure (yr)

Target PE 10% 2% Custom

Custom PE

2. SESAT-2000 Source Model

SESAT-2000 workflow: Define seismotectonic sources, lineaments, and attributes for accurate probabilistic computation.

Source Model Type SESAT-2000 Based Areal Sources SESAT-2000 Based Fault/Line Sources SESAT-2000 Mixed Point/Line/Area

SESAT Source Import

3. Earthquake Catalogue

No catalogue loaded.

4. Seismicity Parameters

Mmin

Mmax

Default b-value

Magnitude Bin

Completeness Period (yr)

G-R Estimation

Mc

Estimated b

5. Ground Motion Prediction Equation

ln(Y) = c0 + c1·M + c2·M² + c3·ln(R + c4) + c5·ln(Vs30/760)

c0

c1

c2

c3

c4

c5

Sigma

Motion Unit gm/s²

GMPE Logic Tree

6. Execution

Min IM (g)

Max IM (g)

Hazard Points

Mag Bins

Ready for calculation.

Target PGA

—

10% PE PGA

—

2% PE PGA

—

Return Period

—

7. Hazard Summary Poisson Model

ID	Source	Type	Lat	Lon	R (km)	Rate/yr	b	Mmax

8. PSHA Hazard Curve

9. Uniform Hazard Response Spectrum (UHRS)

Exposure Period

Target PE 10%2%

Period (s)	Spectral Acceleration SA (g)

10. Magnitude–Distance Deaggregation

Deaggregation IM (g)

Distance Bin (km)

M Bin	Distance Bin (km)	Contribution (%)

11. Source Contribution Breakdown

Source	Annual Contribution	Contribution (%)

12. Numerical Output Results

Parameter	Result	Description

13. Mathematical Formulation

Gutenberg–Richter Recurrence: log₁₀ N(M ≥ m) = a − bm
Exponential Form: f(M) ∝ exp[−βM], where β = b ln(10)
Annual Exceedance Rate: λ(y) = Σ νᵢ ∫ fᵢ(M) P[Y > y | M, R] dM
Poisson Probability Exceedance: P(Y > y, T) = 1 − exp[−λ(y)T]

14. Project Export & Management