M 4.9 earthquake in Ecuador (Riobamba) — August 9, 1978

M 4.9 earthquake in Ecuador (Riobamba) — August 9, 1978. Epicenter 47 km S of Riobamba, depth 131 km, 23:10 Local (1978-08-10 04:10 UTC). Shaking felt by ~788K people. Readings from every reporting agency, affected towns, aftershock sequence.

47 km S of Riobamba (Ecuador) — -2.097, -78.66

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