October 31, 1975 Earthquake: Philippines

Reference #10958:

1975, October 31. 12.54 N, 125.993 E, magnitude 7.4 MS. This earthquake occurred at 4:28 PM on October 31, 1975. The epicenter was in the offshore area east of Samar Island. The nearest towns, about 70 km away from the epicenter, are rural municipalities of the provinces of Northern and Eastern Samar. Intensity reports of Intensity VI levels were received from much farther and more developed towns such as Borongan in Eastern Samar, Catbalogan in Western Samar province and Tacloban in the island province of Leyte. Their distances from the epicenter range from 120 to 180 kilometers. The quake was felt as far north as Manila and south as Masbate.

Reference #417:

1975, October 31. A strong earthquake at a magnitude of 7.2 occurred on the Philippines. Its epicenter was located northeast of Samar Island. In Calbayog the earthquake was felt at an intensity of VI points (Rossi-Fore1 scale)

and in Manila at an intensity of III points. A tsunami was observed which claimed one life.

Reference #1167:

Strong activity in the neighborhood of Samar Island; the earthquake of 13 June was felt in the northern part of Samar; the large shock of 31 October caused considerable damage in the Calbayog area; one person was killed; the shock was felt as far as Manila, 500 km from the epicentre; a local tsunami was reported. It may be noted that the main shock was preceded on the previous day by an earthquake of magnitude m: 5.7. At least twenty-six aftershocks of magnitude m equal to or greater than 5.0 occurred in the same area between 31 October and 12 December...

Reference #1053:

1975, October 31, 08:28:02.6 UTC. 12.54 N, 125.993 E, magnitude 7.2 MS, 6.4 mb. One killed (VI RF) at Calbayog. Felt (III RF) at Manila. Local tsunami.

Reference #45:

1975, October 31, 08:28:02.6 UTC. 12.5 N, 126.0 E, magnitude 6.4 mb, 7.2 Ms. One killed.