M 4.7 earthquake near Sonora, Mexico — 1978-07-21

Magnitude 4.7 earthquake near 155 km W of Guaymas (Mexico), depth 33 km, 03:18 Local (1978-07-21 10:18 UTC). Shaking felt by ~695K people. Readings from every reporting agency, affected towns, aftershock sequence.

155 km W of Guaymas (Mexico) — 27.584, -112.416