Major magnitude 7.4 earthquake - 4.7 km northwest of Lapuyan, Philippines, on Thursday, March 31, 1955 at 18:17 (GMT)
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Major magnitude 7.4 earthquake at 35 km depth
Depth: 35.0 km
Epicenter latitude / longitude: 7.658°N / 123.157°E↗ (Province of Zamboanga del Sur, Zamboanga Peninsula, Philippines)
Antipode: 7.658°S / 56.843°W↗
Nearest volcano: Imbing (8 km / 5 mi)
Nearby towns and cities:
5 km (3 mi) WNW of Lapuyan (pop: 5,270) --> See nearby quakes!
9 km (6 mi) N of Margosatubig (Zamboanga del Sur) (pop: 14,600) --> See nearby quakes!
36 km (22 mi) WSW of Pagadian (pop: 186,900) --> See nearby quakes!
40 km (25 mi) WSW of Muricay (pop: 132,100) --> See nearby quakes!
60 km (37 mi) SW of Molave (Zamboanga del Sur) (pop: 21,100) --> See nearby quakes!
60 km (37 mi) SSW of Mahayag (Zamboanga del Sur) (pop: 17,100) --> See nearby quakes!
64 km (40 mi) ESE of Ipil (Zamboanga Sibugay) (pop: 19,200) --> See nearby quakes!
93 km (58 mi) SW of Ozamiz (Northern Mindanao) (pop: 93,100) --> See nearby quakes!
150 km (93 mi) WNW of Budta (Autonomous Region in Muslim Mindanao) (pop: 1,273,700) --> See nearby quakes!
808 km (502 mi) SSE of Manila (National Capital Region) (pop: 1,600,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.9 x 1015 joules (2206 gigawatt hours, equivalent to 1.9 x 106 tons of TNT or 118.7 atomic bombs!) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
|7.4||35 km||Mindanao, Philippines||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Recorded aftershocks, latest first (2 quakes)
- 10 Apr 1955 17:38 UTC| M 6.3 |15 km (9.3 mi) depth|103 km (64 mi) distance| USGS | Very strong mag. 6.3 earthquake - 23 km west of Bualan, Philippines, on Sunday, April 10, 1955 at 17:38 (GMT)
- 31 Mar 1955 20:52 UTC| M 6.3 |35 km (21.7 mi) depth|102 km (63 mi) distance| USGS | Very strong mag. 6.3 earthquake - 7.6 km west of Marogong, Philippines, on Thursday, March 31, 1955 at 20:52 (GMT)