FA-71455 / Seismic magnitude estimation / Member archive

Prague surface-wave magnitude: period window · case 05

18 s Rayleigh readings are excluded.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

readings are [amplitude um, period s, distance deg]. Events with depth >= 60 km return None. Use only readings with 18 <= T <= 22, 20 <= delta <= 160 and positive amplitude; Ms_i = log10(A/T) + 1.66 log10(delta) + 3.3; return [mean rounded 0.01, count] or None.

Why this case matters

Ms remains the reference shallow-event magnitude in historical catalogues.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
Ms event 8	`null`	`[5.61, 1]`	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.