May 6, 1939 Earthquake: Luzon Island, Mindor Island, Philippines

Reference #414:

1939, May 7, 1:00 [local time]. There was an earthquake with source in the Verde Passage. There were strong; tremors on the north coast of Mindor Island and the south coast of Luzon Island. At Batangas, the earthquake had a force of 4-5 degrees (V Rossi-Forel) and was accompanied by a muffled rumble. At Ambulong Island, Atimonan, Lusena, Boat, Daet, Santa Cruz, and Manila, the intensity was 4 degrees (IV). The radius of perceptibility of the earthquake was 200 km. There was a weak aftershock 9 minutes later and a strong one another 12 minutes later. Then followed a series of weak shocks.

According to a chronicle (SN, 1939, vol. 29, No. 3), as a result of these shocks, the water in the wells became unusually warm, rocks rolled down from the hills and the ground cracked on Verde Island. Part of the island, beginning on 18.V [?] settled 1 m. Rothe's compendium (1941), adds that the island was flooded by the sea and the residents had to be evacuated.

Gutenberg, Richter (1954): 6.V; 17h00m07s; 13.5 N, 121.25 E.; 110 km; M=6.5.

Reference #1187:

1939 May 07, 1:00 a.m. [local time]. Mindoro and S Luzon: North coast of Mindoro; South coast of Luzon - very

strong. Batangas - Intensity V; accompanied by loud noise.

Ambulong; Atimonan; Lucena; Boac; Daet; Sta. Cruz; Manila - Intensity IV. Centre in the Verde Island Passage.

Reference #1058:

1939, May 6, 17:00:07 UTC, 13.5 N, 121.5 E, depth 110 km, magnitude 6.5.

Reference #45:

1939, May 6, 17 00.1 UTC, Southern Luzon, Philippine Islands, depth 75 km, 13.5 N 121.2 E.

Reference #9889:

1939, May 7. An earthquake shook Manila at 1:01 a.m. No damage was reported.