Very strong mag. 6.3 earthquake - Philippine Sea, 60 km east of Tandag, Philippines, on Wednesday, April 24, 1991 at 04:57 (GMT)

Very strong mag. 6.3 earthquake - Philippine Sea, 60 km east of Tandag, Philippines, on Wednesday, April 24, 1991 at 04:57 (GMT)

Very strong magnitude 6.3 earthquake at 14 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Apr 24, 1991 04:57:14 UTC
Magnitude: 6.3
Depth: 13.8 km
Epicenter latitude / longitude: 9.041°N / 126.739°E (Philippine Sea, Philippines)
Antipode: 9.041°S / 53.261°W
Nearest volcano: Paco (147 km / 91 mi)
Nearby towns and cities:
50 km (31 mi) ENE of Arrasasan (pop: 5,100) --> See nearby quakes!
60 km (37 mi) E of Tandag (pop: 29,000) --> See nearby quakes!
84 km (52 mi) ENE of Lianga (Surigao del Sur) (pop: 13,600) --> See nearby quakes!
87 km (54 mi) NNE of Hinatuan (pop: 10,100) --> See nearby quakes!
90 km (56 mi) NE of Tagbina (pop: 10,700) --> See nearby quakes!
103 km (64 mi) NNE of Bislig City (pop: 67,600) --> See nearby quakes!
111 km (69 mi) ENE of Bayugan (pop: 40,600) --> See nearby quakes!
132 km (82 mi) E of Butuan (pop: 309,700) --> See nearby quakes!
136 km (85 mi) E of Libertad (pop: 250,400) --> See nearby quakes!
881 km (547 mi) SE of Manila (pop: 1,600,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 atomic bombs!) More info
Show interactive Map
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.DepthLocationSource
6.314 kmMindanao, PhilippinesUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
Volcanoes & Earthquakes - new app for Android

Aftershocks

[More info]

Recorded aftershocks, latest first (30 quakes)

Date and timeMag
Depth
LocationDetails
Oct 13, 1991 01:46
30 years ago
4.8

33 km
Philippine Sea, 92 km NE of Tandag, PhilippinesMore
Aug 6, 1991 23:21
30 years ago
5.1

65 km
Philippine Sea, 41 km SE of Tandag, PhilippinesMore
Jul 8, 1991 10:53
30 years ago
4.5

33 km
Philippine Sea, 124 km E of Tandag, PhilippinesMore
Jun 30, 1991 04:54
30 years ago
4.4

33 km
Philippine Sea, 103 km E of Tandag, PhilippinesMore
Jun 20, 1991 04:56
30 years ago
4.3

33 km
Philippine Sea, 135 km NE of Bislig City, PhilippinesMore
Jun 12, 1991 07:47
31 years ago
4.9

63 km
Philippine Sea, 112 km NE of Bislig City, PhilippinesMore
Jun 12, 1991 07:41
31 years ago
4.5

105 km
Philippine Sea, 80 km NE of Bislig City, PhilippinesMore
Jun 12, 1991 07:00
31 years ago
5.0

37 km
Philippine Sea, 112 km NE of Bislig City, PhilippinesMore
Jun 11, 1991 07:44
31 years ago
5.0

35 km
Philippine Sea, 103 km NE of Bislig City, PhilippinesMore
Jun 9, 1991 05:48
31 years ago
5.0

33 km
Philippine Sea, 115 km NE of Bislig City, PhilippinesMore
Jun 8, 1991 21:36
31 years ago
4.6

33 km
Philippine Sea, 35 km NE of Pangasinan Island, PhilippinesMore
Jun 8, 1991 19:52
31 years ago
4.7

90 km
Philippine Sea, 21 km NE of Gabao Islet Island, PhilippinesMore
Jun 8, 1991 19:50
31 years ago
4.7

58 km
Philippine Sea, 57 km NE of Bislig City, PhilippinesMore
Jun 8, 1991 15:15
31 years ago
4.3

33 km
Philippine Sea, 141 km NE of Bislig City, PhilippinesMore
Jun 8, 1991 14:07
31 years ago
4.8

58 km
Philippine Sea, 108 km NE of Bislig City, PhilippinesMore
Jun 7, 1991 20:06
31 years ago
4.5

64 km
Philippine Sea, 39 km E of Lajanosa Island, PhilippinesMore
Jun 7, 1991 11:28
31 years ago
5.1

30 km
Philippine Sea, 66 km NE of Bislig City, PhilippinesMore
Jun 7, 1991 04:56
31 years ago
4.7

77 km
Philippine Sea, 21 km SE of Lajanosa Island, PhilippinesMore
Jun 7, 1991 02:54
31 years ago
4.8

66 km
Philippine Sea, 33 km SE of Lajanosa Island, PhilippinesMore
May 5, 1991 16:01
31 years ago
4.9

33 km
Philippine Sea, 58 km E of Tandag, PhilippinesMore
May 2, 1991 15:27
31 years ago
5.0

76 km
Philippine Sea, 79 km NE of Bislig City, PhilippinesMore
Apr 29, 1991 19:41
31 years ago
4.7

74 km
Philippine Sea, 52 km E of Tandag, PhilippinesMore
Apr 28, 1991 18:17
31 years ago
4.5

87 km
Philippine Sea, 44 km E of Tandag, PhilippinesMore
Apr 28, 1991 11:06
31 years ago
4.4

41 km
Philippine Sea, 73 km NE of Tandag, PhilippinesMore
Apr 27, 1991 20:08
31 years ago
5.2

58 km
Philippine Sea, 31 km NE of Tandag, PhilippinesMore
Apr 27, 1991 05:51
31 years ago
4.5

98 km
Philippine Sea, 39 km E of Tandag, PhilippinesMore
Apr 26, 1991 15:05
31 years ago
4.2

60 km
Philippine Sea, 22 km E of Tandag, PhilippinesMore
Apr 24, 1991 10:19
31 years ago
4.4

60 km
Philippine Sea, 66 km E of Tandag, PhilippinesMore
Apr 24, 1991 10:06
31 years ago
5.5

33 km
Philippine Sea, 63 km E of Tandag, PhilippinesMore
Apr 24, 1991 06:50
31 years ago
4.2

60 km
Philippine Sea, 53 km E of Tandag, PhilippinesMore

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.