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Estimated Mercalli intensity: intensity rounding · case 03

Intensity 6.7 is reported as VI.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

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 fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixtureActualExpectedOutcome
M6.0 at 3 km depth 2[8, "VIII"][9, "IX"]Failed

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