M 4.6 earthquake in Mexico (Guaymas) — August 20, 2004

M 4.6 earthquake in Mexico (Guaymas) — August 20, 2004. Epicenter 221 km W of Guaymas, depth 10 km, 01:06 Local (2004-08-20 08:06 UTC). Shaking felt by ~710K people. Readings from every reporting agency, affected towns, aftershock sequence.

221 km W of Guaymas (Mexico) — 28.218, -113.12

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