M 4.8 earthquake: Caribbean Sea (Mayagüez, Puerto Rico) — March 9, 1983

M 4.8 earthquake: Caribbean Sea (Mayagüez, Puerto Rico) — March 9, 1983. Epicenter 100 km NW of Mayagüez, depth 35 km, 01:21 Local (1983-03-09 05:21 UTC). Shaking felt by ~397K people. Readings from every reporting agency, affected towns, aftershock sequence.

Caribbean Sea (100 km NW of Mayagüez, Puerto Rico) — 18.977, -67.627

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