Strong mag. 6.9 earthquake - South Pacific Ocean, 141 km west of Nuku\'alofa, Tongatapu, on Saturday, 23 June 1990 at 21:38 (GMT)

Strong mag. 6.9 earthquake - South Pacific Ocean, 141 km west of Nuku\'alofa, Tongatapu, on Saturday, 23 June 1990 at 21:38 (GMT)

Strong magnitude 6.9 earthquake at 181 km depth

Date & time: 23 Jun 1990 21:38:18 UTC
Magnitude: 6.9
Depth: 180.5 km
Epicenter latitude / longitude: 21.568°S / 176.483°W (South Pacific Ocean, Tonga)
Nearest volcano: Unnamed 21.38°S/175.65°W (89 km / 55 mi)
Nearby towns and cities:
139 km (87 mi) WSW of Haveluloto (pop: 3,420) --> See nearby quakes!
141 km (88 mi) WSW of Nuku'alofa (pop: 22,400) --> See nearby quakes!
141 km (88 mi) WSW of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
154 km (96 mi) WSW of Kolonga (pop: 1,100) --> See nearby quakes!
161 km (100 mi) W of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
295 km (183 mi) SW of Pangai (pop: 1,740) --> See nearby quakes!
416 km (259 mi) SW of Neiafu (pop: 4,320) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 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.
MagnitudeDepthLocationSource
M 6.9181 kmFiji region (Tonga)USGS
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 (9 quakes):
  • 13 Dec 1990 16:27 UTC
    | M 4.7 |
    209.9 km (130.4 mi) depth
    |
    70 km (43 mi) distance
    | USGS | Details
  • 18 Nov 1990 05:12 UTC
    | M 4.3 |
    143.3 km (89 mi) depth
    |
    155 km (96 mi) distance
    | USGS | Details
  • 21 Oct 1990 19:05 UTC
    | M 5.3 |
    497.6 km (309.2 mi) depth
    |
    169 km (105 mi) distance
    | USGS | Details
  • 13 Oct 1990 22:02 UTC
    | M 4.8 |
    248.4 km (154.3 mi) depth
    |
    159 km (99 mi) distance
    | USGS | Details
  • 24 Aug 1990 19:29 UTC
    | M 4.1 |
    490 km (304.5 mi) depth
    |
    140 km (87 mi) distance
    | USGS | Details
  • 12 Jul 1990 23:49 UTC
    | M 4.8 |
    201.9 km (125.5 mi) depth
    |
    122 km (76 mi) distance
    | USGS | Details
  • 11 Jul 1990 17:34 UTC
    | M 5.2 |
    202.6 km (125.9 mi) depth
    |
    86 km (53 mi) distance
    | USGS | Details
  • 27 Jun 1990 05:10 UTC
    | M 5.4 |
    189.1 km (117.5 mi) depth
    |
    19 km (12 mi) distance
    | USGS | Details
  • 24 Jun 1990 08:35 UTC
    | M 5.8 |
    193.2 km (120 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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