July 12, 1911 Earthquake: Talacogon,davao,butuan, Mindanao, Philippines

1911, July 12, 04:07.6 UTC, 9 N, 126 E, depth 50 km, magnitude 7.75. There was an earthquake with pleistoseismic zone in the valley of the Agusan River, where its force reached 7-8 degrees (VIII-IX Rossi-Forel). At Talacogon, the tremors lasted 3 minutes and were preceded by weaker oscillations. According to accounts, high waves formed in one of the lakes, flooded the shore and travelled far inland [seiches?]. At Butuan, the earthquake lasted 2 minutes, and began with very weak movements. Almost all the homes, both pile as well as brick, were damaged. Trees were ripped from the ground. Cracks appeared in the ground. People bathing in the river, related that the water first rushed from the western shore to the eastern, and then back again. The movement of the water was so strong, that an enormous beam, secured with a thick reed, was ripped off and carried away [seiches on the river]. The earthquake was followed by a large number of aftershocks. (reference #414)

1911, July 12, 04:07:36 UTC, 9 N, 126 E, magnitude 7.75 MS. (reference #88)

1911, July 12. Intensity IX. Surigao, Davao and Agusan. Destructive. (reference #1058)