Major magnitude 7.5 earthquake - Celebes Sea, 74 km south of Glan, Philippines, on Tuesday, November 20, 1984 at 08:15 (GMT)

Major magnitude 7.5 earthquake - Celebes Sea, 74 km south of Glan, Philippines, on Tuesday, November 20, 1984 at 08:15 (GMT)

Major magnitude 7.5 earthquake at 202 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Nov 20, 1984 08:15:16 UTC
Magnitude: 7.5
Depth: 202.2 km
Epicenter latitude / longitude: 5.167°N / 125.124°E (Celebes Sea, Philippines)
Antipode: 5.167°S / 54.876°W
Nearest volcano: Balut (38 km / 24 mi)
Nearby towns and cities:
46 km (29 mi) SW of Sarangani (Davao del Sur) (pop: 7,510) --> See nearby quakes!
74 km (46 mi) S of Glan (Sarangani) (pop: 24,300) --> See nearby quakes!
91 km (57 mi) S of Malapatan (Sarangani) (pop: 19,400) --> See nearby quakes!
98 km (61 mi) S of Lun Pequeño (pop: 11,500) --> See nearby quakes!
105 km (65 mi) S of General Santos City (pop: 679,600) --> See nearby quakes!
106 km (66 mi) S of Alabel (pop: 43,300) --> See nearby quakes!
117 km (73 mi) S of Polomolok (pop: 64,000) --> See nearby quakes!
125 km (78 mi) S of Maluñgun (pop: 52,200) --> See nearby quakes!
145 km (90 mi) SSE of Banga (pop: 58,900) --> See nearby quakes!
152 km (94 mi) SSE of Koronadal City (pop: 125,500) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1016 joules (3117 gigawatt hours, equivalent to 2.7 x 106 tons of TNT or 167.6 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
7.5202 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.
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Aftershocks

More info

Recorded aftershocks, latest first (51 quakes)

  • 12 Nov 1986 14:37 UTC
    | M 5.2 |
    98 km (60.9 mi) depth
    |
    146 km (91 mi) distance
    | USGS | Details
  • 29 Oct 1986 20:11 UTC
    | M 5.6 |
    71.6 km (44.5 mi) depth
    |
    66 km (41 mi) distance
    | USGS | Details
  • 18 Oct 1986 08:54 UTC
    | M 5.2 |
    200.9 km (124.8 mi) depth
    |
    24 km (15 mi) distance
    | USGS | Details
  • 26 Sep 1986 01:07 UTC
    | M 5.0 |
    69.1 km (42.9 mi) depth
    |
    239 km (149 mi) distance
    | USGS | Details
  • 12 Sep 1986 11:27 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 06 Sep 1986 23:06 UTC
    | M 5.3 |
    109.4 km (68 mi) depth
    |
    109 km (67 mi) distance
    | USGS | Details
  • 04 Aug 1986 06:24 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    164 km (102 mi) distance
    | USGS | Details
  • 19 Jul 1986 04:35 UTC
    | M 5.0 |
    145.1 km (90.2 mi) depth
    |
    130 km (81 mi) distance
    | USGS | Details
  • 12 Jul 1986 10:17 UTC
    | M 5.5 |
    87.5 km (54.4 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 01 Jul 1986 04:32 UTC
    | M 5.2 |
    558.4 km (347 mi) depth
    |
    160 km (99 mi) distance
    | USGS | Details
  • 17 Jun 1986 18:13 UTC
    | M 6.6 |
    31.9 km (19.8 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Very strong mag. 6.6 earthquake - Celebes Sea, 53 km south of General Santos City, Philippines, on Tuesday, June 17, 1986 at 18:13 (GMT)
  • 17 Jun 1986 10:38 UTC
    | M 6.0 |
    33 km (20.5 mi) depth
    |
    192 km (119 mi) distance
    | USGS | Strong mag. 6.0 earthquake - Philippines Sea, 29 km northeast of Pulau Mianggas Island, Indonesia, on Tuesday, June 17, 1986 at 10:38 (GMT)
  • 01 Jun 1986 20:14 UTC
    | M 5.2 |
    123.6 km (76.8 mi) depth
    |
    117 km (73 mi) distance
    | USGS | Details
  • 26 May 1986 02:09 UTC
    | M 5.1 |
    48.9 km (30.4 mi) depth
    |
    241 km (149 mi) distance
    | USGS | Details
  • 19 May 1986 17:58 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    149 km (93 mi) distance
    | USGS | Details
  • 08 May 1986 14:37 UTC
    | M 6.4 |
    165.5 km (102.8 mi) depth
    |
    73 km (45 mi) distance
    | USGS | Strong mag. 6.4 earthquake - Philippines Sea, 50 km northwest of Pulau Dumarehe Island, Indonesia, on Thursday, May 8, 1986 at 14:37 (GMT)
  • Show all

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