FA-71672 / Seismic magnitude estimation / Member archive
Estimated Mercalli intensity: near-field distance floor · case 02
Very shallow events directly under a site produce extreme intensities.
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 0 km depth 0.5 | [5, "V"] | [4, "IV"] | 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 ↗