June 13, 1929 Earthquake: Hinatuan,ebro, Mindanao, Philippines

Reference #414:

1929, June 13, 17:24. There was a strong earthquake with source off the eastern shore of Mindanao Island. At Hinatuan and Ebra, situated on weak loose soils, the force of tremors was estimated at 9 degrees (X Rossi-Forel). At Hinatuan, the earthquake began with abrupt vertical shocks; then regular horizontal oscillations were observed. People remained standing with difficulty. Many old homes were destroyed. Almost all of those that remained standing tilted to one side. The concrete cupolas of the church were not damaged. Numerous landslides occurred in the mountains between Hinatuan and Cape Lamon.

Homes sank to one side at Ebra. Ground waves could be seen. Many landslides and cave-ins of the ground were observed near the city. The water in the river began to move and inundated the subsided areas of the flood plain. At Lianga and Bislig, situated near Hinatuan, but located on bedrocks, the tremors were considerably weaker. At Talacogon, the tremors, estimated at 7 degrees (VIII), lasted 50 seconds. The banks of the river collapsed. At Butuan (6 degrees), the earthquake was preceded by an underground rumble. People were thrown to the ground. Several old walls and staircases collapsed. The water in the river surged onto the eastern shore. The tremors were also estimated at 6 degrees (VII) at Cantilan, Veruela, Calava, 5 degrees (VI) at Surigao and Malaybalay, 4-5 degrees at Guiuan, Davao and Malita, 4 degrees at Catbalogan, Borongan, Ormoc, Mambajao, and 3 degrees at Iloilo, Cebu, Carmen, Cagayan, Canassi, and Cotabato. Recurrent shocks were felt almost continuously for a month at Hinatuan. Up to 70 were counted on some days.

After the earthquake, a small tsunami entered Hinatuan Ray. An eyewitness, who sailed on the following day from Liang to Hinatuan, noted that the entire shore from Cape Lamon to Hinatuan, as well as the surface of the sea, were strewn with dead fish. A resident, who was in a boat on the Agusan River, 2 km upstream from Butuan, noted that after the earthquake, the river flowed backwards.

Gutenberg, Richter (1954): 13.VI; 9h24m34S; 8.5 N, 127

E; M=7.2.

Reference #1187:

1929, June 13, 5:26 p.m. [local time], 8.5 N, 127 E, magnitude 7.2, intensity X.

Reference #1058:

1929, June 13, 09;24:28 UTC, 8.3 N, 126.9 E, magnitude 7.2. Agusan, intensity IX, destructive.

Reference #88:

1929, June 13, 09:24:34 UTC, 8.5 N, 127 E, shallow depth, magnitude 7.2 MS.