FA-71615 / Seismic magnitude estimation / Member archive

Preferred magnitude selection: Mw authority first · case 05

Deep events with a moment magnitude publish mb instead.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

mags maps type to value (any value including 0 or negative is valid when the key is present). Choose in order: Mw; if depth > 70 km then mb; Ms if Ms >= 5.5; ML if delta <= 5 degrees; mb; Md; else None. Return [type, value].

Why this case matters

Catalogues publish one preferred magnitude chosen by a fixed authority ladder.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
['Ms', 'Mw', 'mb'] depth 300 delta 1.0	`["mb", 5.9]`	`["Mw", 6.1]`	Failed

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