Moment Magnitude From Moment Hanks Kanamori
Convert seismic moment to moment magnitude: M_w = (2/3)(log₁₀M₀ − 9.1).
Description
Convert seismic moment to moment magnitude: M_w = (2/3)(log₁₀M₀ − 9.1).
Moment Magnitude From Moment Hanks Kanamori is a focused tool for the following task. Convert seismic moment to moment magnitude: M_w = (2/3)(log₁₀M₀ − 9.1). It reports M_w, Class from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Moment Magnitude From Moment Hanks Kanamori
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.
- M₀ (N·m)
- Required number in N·m. Seismic moment.
The cited overview of Moment magnitude scale supplies background for the terminology and domain context used by this tool.1
How Moment Magnitude From Moment Hanks Kanamori works
Convert seismic moment to moment magnitude: M_w = (2/3)(log₁₀M₀ − 9.1). Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- M_w
- Returned number. Moment magnitude.
- Class
- Returned string. Size class note.
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.
- M₀ 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
-
Moment magnitude scale — Wikipedia contributors
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