M 6.3 earthquake: Caribbean Sea (Mayagüez, Puerto Rico) — December 18, 1922

M 6.3 earthquake: Caribbean Sea (Mayagüez, Puerto Rico) — December 18, 1922. Epicenter 83 km NW of Mayagüez, depth 15 km, 08:35 Local (1922-12-18 12:35 UTC). Shaking felt by ~10.9M people. Readings from every reporting agency, affected towns, aftershock sequence.

Caribbean Sea (83 km NW of Mayagüez, Puerto Rico) — 18.5, -67.859

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