June 15, 1928 Earthquake: SW Mindoro, Philippines

Reference #414:

1928, June 15, 14:13 [local time]. There was a destructive earthquake off the southwestern tip of Mindoro Island. The force of tremors reached 6-7 degrees (VII-VI11 Rossi-Forel) for a distance of 20 km along the coast. The main destruction occurred in the region of the spit, screening Mangarin Bay. Here ran a railway which connected Mangarin Port with a sugar factory, and stood houses of workers and fishermen. As a result of strong tremors and cracking of the ground, houses collapsed completely, and a concrete warehouse and the coastal part of the road were heavily damaged. The loose soil cover apparently slid into the sea; fresh exposures appeared at the line of collapse; the port shallowed; the shore rose in places and subsided at other places.

The force of tremors rapidly abated inland. The radius of the 5 degree (VI) isoseismal was estimated at 160 km; the radius of the boundary of perceptibility was 300 km. Many recurrent shocks occurred, which were registered mainly before the 22nd.

Immediately after the main shocks, the sea surged on land, partly washed out the railway, and inundated the subsided areas of the shore (Maso, 1928).

Gutenberg, Richter (1954): 15.VI; 6h12m36s; 12.5 N,

121.5 E; M=7.

Reference #88:

1928, June 15, 06:12:36 UTC, 12.5 N, 121.5 E, shallow depth, magnitude 7.0 MS.

Reference #1058:

1928, June 15, 06:12:36 UTC, 12.5 N, 121.5 E, magnitude 7.0. Coast of SW and NW Mindoro, intensity VII and VIII, destructive.