Strong mag. 6.4 earthquake - Philippine Sea, 122 km southeast of Alabel, Philippines, on Sunday, February 20, 1983 at 10:49 (GMT)

Strong mag. 6.4 earthquake - Philippine Sea, 122 km southeast of Alabel, Philippines, on Sunday, February 20, 1983 at 10:49 (GMT)

Strong magnitude 6.4 earthquake at 61 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Feb 20, 1983 10:49:54 UTC
Magnitude: 6.4
Depth: 60.5 km
Epicenter latitude / longitude: 5.546°N / 126.246°E (Philippine Sea, Philippines)
Antipode: 5.546°S / 53.754°W
Nearest volcano: Balut (98 km / 61 mi)
Nearby towns and cities:
79 km (49 mi) ESE of Caburan (Davao del Sur) (pop: 12,600) --> See nearby quakes!
119 km (74 mi) SE of Malita (pop: 41,100) --> See nearby quakes!
122 km (76 mi) ESE of Alabel (pop: 43,300) --> See nearby quakes!
134 km (83 mi) SE of Maluñgun (pop: 52,200) --> See nearby quakes!
135 km (84 mi) ESE of General Santos City (pop: 679,600) --> See nearby quakes!
157 km (97 mi) S of Mati (pop: 105,900) --> See nearby quakes!
166 km (103 mi) SE of Digos (pop: 116,100) --> See nearby quakes!
184 km (114 mi) SSE of Davao City (pop: 1,212,500) --> See nearby quakes!
188 km (117 mi) SE of Koronadal (pop: 125,500) --> See nearby quakes!
272 km (169 mi) SE of Budta (pop: 1,273,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 atomic bombs!) More info
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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
6.461 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 yet. If you felt it be the first to report it!
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Aftershocks

[More info]

Recorded aftershocks, latest first (27 quakes)

  • 29 Jul 1983 20:25 UTC
    | M 5.2 |
    53.3 km (33.1 mi) depth
    |
    37 km (23 mi) distance
    | USGS | Details
  • 19 Jul 1983 10:50 UTC
    | M 4.5 |
    83.6 km (51.9 mi) depth
    |
    12 km (7 mi) distance
    | USGS | Details
  • 17 Jul 1983 05:22 UTC
    | M 5.2 |
    50.1 km (31.1 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 16 Jul 1983 08:56 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    38 km (24 mi) distance
    | USGS | Details
  • 16 Jul 1983 02:32 UTC
    | M 5.2 |
    44.7 km (27.8 mi) depth
    |
    28 km (18 mi) distance
    | USGS | Details
  • 15 Jul 1983 12:22 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    18 km (11 mi) distance
    | USGS | Details
  • 15 Jul 1983 10:45 UTC
    | M 5.7 |
    49.4 km (30.7 mi) depth
    |
    29 km (18 mi) distance
    | USGS | Details
  • 14 Jul 1983 19:47 UTC
    | M 6.3 |
    43 km (26.7 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Strong mag. 6.3 earthquake - Philippine Sea, Philippines, 15 km west of Pulau Baronto Island, Indonesia, on Thursday, July 14, 1983 at 19:47 (GMT)
  • 14 Jul 1983 19:45 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    51 km (32 mi) distance
    | USGS | Details
  • 24 Jun 1983 18:55 UTC
    | M 5.2 |
    51.3 km (31.9 mi) depth
    |
    81 km (50 mi) distance
    | USGS | Details
  • 22 Apr 1983 07:51 UTC
    | M 5.6 |
    67.8 km (42.1 mi) depth
    |
    94 km (58 mi) distance
    | USGS | Details
  • 08 Apr 1983 15:15 UTC
    | M 4.8 |
    69.9 km (43.4 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 05 Apr 1983 07:40 UTC
    | M 5.1 |
    62.1 km (38.6 mi) depth
    |
    18 km (11 mi) distance
    | USGS | Details
  • 24 Mar 1983 02:09 UTC
    | M 4.4 |
    67.2 km (41.8 mi) depth
    |
    63 km (39 mi) distance
    | USGS | Details
  • 15 Mar 1983 20:31 UTC
    | M 4.8 |
    65.4 km (40.6 mi) depth
    |
    57 km (36 mi) distance
    | USGS | Details
  • 15 Mar 1983 19:58 UTC
    | M 6.7 |
    41 km (25.5 mi) depth
    |
    42 km (26 mi) distance
    | USGS | Very strong mag. 6.7 earthquake - Philippine Sea, 23 km south of Pulau Baronto Island, Indonesia, on Tuesday, March 15, 1983 at 19:58 (GMT)
  • Show all

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