M 5.7 Earthquake: Philippine Sea (Zamboanga, Philippines) — February 23, 1991

M 5.7 Earthquake: Philippine Sea (Zamboanga, Philippines) — February 23, 1991. Epicenter 139 km N of Zamboanga, depth 54 km, 13:55 Local (1991-02-23 05:55 UTC). Shaking felt by ~8.3M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (139 km N of Zamboanga, Philippines) — 8.167, 122.129

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