Slow Slip Equivalent Magnitude Duration Scaling Calculator
Equivalent moment magnitude of a slow-slip episode from plate-rate slip accumulated over its duration.
Description
Equivalent moment magnitude of a slow-slip episode from plate-rate slip accumulated over its duration.
Slow Slip Equivalent Magnitude Duration Scaling Calculator is a focused tool for the following task. Equivalent moment magnitude of a slow-slip episode from plate-rate slip accumulated over its duration. It reports M_w, d, M₀ from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Slow Slip Equivalent Magnitude Duration Scaling
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.
- A (km²)
- Required number in km². Slip patch area.
- T (d)
- Required number in d. Episode duration.
- v_pl (mm/yr)
- Required number in mm/yr. Plate convergence rate.
- ξ
- Optional number. Slip amplification over plate rate.
- μ (GPa)
- Optional number in GPa. Rigidity.
The cited overview of Seismic magnitude scales supplies background for the terminology and domain context used by this tool.1
How Slow Slip Equivalent Magnitude Duration Scaling works
Equivalent moment magnitude of a slow-slip episode from plate-rate slip accumulated over its duration. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- M_w
- Returned number. Equivalent moment magnitude.
- d (m)
- Returned number in m. Accumulated slow slip.
- M₀ (N·m)
- Returned number in N·m. Geodetic moment.
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.
- A must be at least 0.
- T must be at least 0.
- v_pl 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
-
Seismic magnitude scales — Wikipedia contributors
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