Strike-Slip Seismic Moment and Average Dislocation Estimate
Seismic moment and average dislocation estimate for a strike-slip rupture: geodetic moment M₀ = μ·A·ū and a half-slip (ū/2) offset scale; this heuristic does NOT compute the Okada (1992) elastic half-space spatial displacement field.
Description
Seismic moment and average dislocation estimate for a strike-slip rupture: geodetic moment M₀ = μ·A·ū and a half-slip (ū/2) offset scale; this heuristic does NOT compute the Okada (1992) elastic half-space spatial displacement field.
Strike-Slip Seismic Moment and Average Dislocation Estimate is a focused tool for the following task. Seismic moment and average dislocation estimate for a strike-slip rupture: geodetic moment M₀ = μ·A·ū and a half-slip (ū/2) offset scale; this heuristic does NOT compute the Okada (1992) elastic half-space spatial displacement field. It reports ū/2 scale, M₀ from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Strike-Slip Seismic Moment and Average Dislocation Estimate
Use this seismology calculation to reproduce a stated convention, screen observations, or compare scenarios whose units, coordinate conventions, catalog selection, and model assumptions are known.
- u (m)
- Required number in m. Average slip.
- L (km)
- Required number in km. Fault length.
- W (km)
- Required number in km. Fault width.
The cited overview of Fault (geology) supplies background for the terminology and domain context used by this tool.1
How Strike-Slip Seismic Moment and Average Dislocation Estimate works
Seismic moment and average dislocation estimate for a strike-slip rupture: geodetic moment M₀ = μ·A·ū and a half-slip (ū/2) offset scale; this heuristic does NOT compute the Okada (1992) elastic half-space spatial displacement field. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- ū/2 scale (m)
- Returned number in m. Half-slip horizontal offset scale (ū/2), not an Okada spatial solution.
- M₀ (N·m)
- Returned number in N·m. Geodetic moment μ·A·ū.
Limitations and assumptions
- Earth structure, source geometry, path effects, site response, instrument response, catalog completeness, uncertainty, and the fitted range can dominate the accuracy of simplified seismic calculations.
- u must be at least 0.
- L must be at least 0.
- W must be at least 0.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
For analysis or hazard decisions, retain uncertainty and provenance and compare the result with waveform processing, calibrated regional models, and guidance from qualified seismologists or the responsible agency.
References
-
Fault (geology) — Wikipedia contributors
Similar or alternative tools
- Dip-Slip Seismic Moment and Average Dislocation Estimate
Seismic moment and average dislocation estimate for a dip-slip rupture: geodetic moment M₀ = μ·A·ū plus a heuristic vertical offset scale; this tool does NOT solve the Okada (1992) elastic half-space displacement field.
- Seismic Moment To Slip Displacement Back Calc
Average slip from moment and area: D = M₀/(μ·A).
- Source Rise Time Dislocation Calculator
Characteristic source timescale estimated as fault width divided by shear-wave velocity; this is a dimensional proxy, not a fitted rupture rise-time model.