Catalog Magnitude Type Histogram Summary
Count catalog magnitudes by reported type (ml, mb, ms, mw, other).
Description
Count catalog magnitudes by reported type (ml, mb, ms, mw, other).
Catalog Magnitude Type Histogram Summary is a focused tool for the following task. Count catalog magnitudes by reported type (ml, mb, ms, mw, other). It reports M_L, m_b, M_s, M_w, other from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Catalog Magnitude Type Histogram Summary
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.
- types
- Required list. Magnitude type per event (case-insensitive).
The cited overview of Seismic magnitude scales supplies background for the terminology and domain context used by this tool.1
How Catalog Magnitude Type Histogram Summary works
Count catalog magnitudes by reported type (ml, mb, ms, mw, other). Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- M_L
- Returned integer. Local magnitude count.
- m_b
- Returned integer. Body-wave count.
- M_s
- Returned integer. Surface-wave count.
- M_w
- Returned integer. Moment count.
- other
- Returned integer. Unrecognized types.
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.
- 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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Fraction of the catalog retained as Poissonian background after declustering.