Measure Amplitudes
45 minMax P displacement on Wood-Anderson equivalent trace.
Intermediate1-3 hours
Earthquake Magnitude Calculation Guide
Learn earthquake magnitude calculation from scratch with a clear step-by-step workflow, recommended tools, safety guidelines, and expert tips.
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Workflow
Apply Distance Correction
30 minUse Richter log A − log A0(Δ) or regional calibration.
Average Station ML
30 minRemove outliers >0.5 units; average remainder.
Enter Catalog Metadata
20 minRecord type, station count, RMS, analyst ID.
Checklist
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Planning
Preparation
Safety
Execution
Reference Materials
Richter MLStandard
ML = log10(A) − log10(A0(Δ)) + S(d,h) for WA amplitude A in mm.
Energy RelationFormula
log10(E) ≈ 1.5 ML + 4.8 J — use Mw for large events.
Scale SaturationTable
Comparison.
| Scale | Range | Saturation |
|---|---|---|
| ML | <6 | Yes |
| Mw | All | No |
| Mb | 4–7 | Moderate |
Label in Field
Label samples immediately with date, GPS coordinates, and habitat notes.
Chain of Custody
Maintain sample integrity from collection through lab analysis.
Wildlife Safety
Know venomous species and territorial animals in your study area.
Safety Notes
- Follow network protocols before public release.
- Archive raw waveforms before filtering.