FA-71663 / Seismic magnitude estimation / Member archive
Estimated Mercalli intensity: lower intensity clamp · case 03
Distant small events show negative intensities and wrap around the numeral table.
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 |
|---|---|---|---|
| M2.0 at 80 km depth 15 | [0, "XII"] | [1, "I"] | Failed |
MEMBER ARCHIVE
The complete case is available to members.
This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
Member access is invitation-based. Sign in with your invited account to inspect the sources.
Sign in to the archive ↗