M 4.8 earthquake: Caribbean Sea (San Juan, Puerto Rico) — September 11, 1978

M 4.8 earthquake: Caribbean Sea (San Juan, Puerto Rico) — September 11, 1978. Epicenter 213 km NE of San Juan, depth 33 km, 15:06 Local (1978-09-11 19:06 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Caribbean Sea (213 km NE of San Juan, Puerto Rico) — 19.874, -64.792

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