FA-71592 / Seismic magnitude estimation / Member archive

Preferred magnitude selection: deep event threshold · case 02

Events at exactly 70 km prefer mb over Ms.

Member previewVariant 2 · 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
['ML', 'Ms', 'mb'] depth 70 delta 30.0	`["mb", 5.2]`	`["Ms", 5.5]`	Failed

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