FA-71603 / Seismic magnitude estimation / Member archive

Preferred magnitude selection: local distance limit · case 03

Local events almost never report ML.

Member previewVariant 3 · 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', 'Md'] depth 70 delta 1.0	`["Md", 0.3]`	`["ML", 0.0]`	Failed

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