M 4.9 earthquake in Ecuador (Riobamba) — May 10, 1973

M 4.9 earthquake in Ecuador (Riobamba) — May 10, 1973. Epicenter 51 km S of Riobamba, depth 131 km, 08:46 Local (1973-05-10 13:46 UTC). Shaking felt by ~1M people. Readings from every reporting agency, affected towns, aftershock sequence.

51 km S of Riobamba (Ecuador) — -2.102, -78.816

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