FA-71660 / Seismic magnitude estimation / Member archive
Estimated Mercalli intensity: Roman numeral index · case 05
Intensity V is labelled VI.
Case contract
R = max(hypocentral distance, 1 km). I = 1.45M - 2.46 log10(R) + 1.5, rounded half up to an integer and clamped to 1..12. Return [I, Roman numeral].
Why this case matters
ShakeMap-style intensity summaries are published as Roman numerals.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| M4.5 at 300 km depth 30 | [2, "III"] | [2, "II"] | Failed |
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