Very strong mag. 6.5 earthquake - Sagayaran Island, 10.6 km southeast of Muricay, Philippines, on Monday, March 18, 1985 at 19:49 GMT
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Very strong magnitude 6.5 earthquake at 33 km depth
1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Magnitude: 6.5
Depth: 33.0 km
Epicenter latitude / longitude: 7.758°N / 123.544°E

Antipode: 7.758°S / 56.456°W
Nearest volcano: Imbing (36 km / 22 mi)
Nearby towns and cities:
11 km (7 mi) SE of Muricay (pop: 132,100) --> See nearby quakes!
14 km (9 mi) ESE of Pagadian City (pop: 186,900) --> See nearby quakes!
37 km (23 mi) S of Molave (Zamboanga del Sur) (pop: 21,100) --> See nearby quakes!
41 km (25 mi) SSW of Tangub (Misamis Occidental) (pop: 29,700) --> See nearby quakes!
42 km (26 mi) SSE of Mahayag (Zamboanga del Sur) (pop: 17,100) --> See nearby quakes!
54 km (34 mi) SW of Ozamiz City (pop: 93,100) --> See nearby quakes!
86 km (53 mi) WSW of Marawi City (pop: 143,600) --> See nearby quakes!
98 km (61 mi) NW of Cotabato City (pop: 179,400) --> See nearby quakes!
116 km (72 mi) WNW of Budta (pop: 1,273,700) --> See nearby quakes!
811 km (504 mi) SSE of Manila (pop: 1,600,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 atomic bombs!) | about seismic energy
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.
Mag. | Depth | Location | Source |
6.5 | 33 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.
Aftershocks
[More info]
Recorded aftershocks, latest first (7 quakes)
Date and time![]() | Mag Depth | Location | Details |
Aug 4, 1985 02:36 37 years ago | 6.4 36 km | Sagayaran Island, 37 km S of Muricay, Philippines | More |
May 31, 1985 07:54 37 years ago | 4.7 619 km | 78 km SW of Cotabato City, PH.14.B8, Mindanao Musulman, Philippines | More |
Mar 22, 1985 19:33 37 years ago | 5.0 36 km | Sagayaran Island, 33 km SE of Muricay, Philippines | More |
Mar 22, 1985 19:03 37 years ago | 5.0 52 km | Sagayaran Island, 29 km SE of Muricay, Philippines | More |
Mar 20, 1985 00:58 37 years ago | 4.8 10 km | 3.1 km NW of Muricay, Zamboanga del Sur, Zamboanga Peninsula, Philippines | More |
Mar 18, 1985 22:48 37 years ago | 5.0 33 km | 9.8 km N of Pagadian City, Zamboanga del Sur, Zamboanga Peninsula, Philippines | More |
Mar 18, 1985 20:49 37 years ago | 5.5 33 km | Sagayaran Island, 25 km SE of Muricay, Philippines | More |
Earlier earthquakes in the same area
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