Strong mag. 6.6 earthquake - Tonga (Samoa) on Sunday, 16 May 1993 at 21:44 (GMT)

Strong mag. 6.6 earthquake  - Tonga (Samoa) on Sunday, 16 May 1993 at 21:44 (GMT)

Strong magnitude 6.6 earthquake at 21 km depth

Date & time: 16 May 1993 09:44:48 UTC###AGESTRINGCOPY###
Magnitude: 6.6
Depth: 21.3 km
Epicenter latitude / longitude: 15.286°S / 173.332°W (Samoa)
Nearest volcano: West Mata (49 km / 30 mi)
Nearby towns and cities:
89 km (56 mi) NNE of Hihifo (Tonga) (pop: 815)
203 km (126 mi) SSW of Vailoa (pop: 769)
210 km (131 mi) SSW of Asau (Vaisigano) (pop: 6,640)
214 km (133 mi) SW of Mulifanua (pop: 4,510)
227 km (141 mi) SSW of Safotu (Gaga'ifomauga) (pop: 1,210)
230 km (143 mi) SW of Afega (Malie, Tuamasaga) (pop: 1,900)
233 km (145 mi) SW of Apia (Tuamasaga) (pop: 40,400)
680 km (423 mi) NNE of Nuku‘alofa (Nuku'alofa, Tongatapu, Tonga) (pop: 22,400)
Primary data source: USGS
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 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 6.621 kmTonga (Samoa)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 of the 6.6 quake Tonga (Samoa) 16 May 21:44 UTC

More info
Recorded aftershocks, latest first (18 quakes):
  • 09 Oct 1993 03:37 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    22 km (14 mi) distance
    | USGS | Details
  • 08 Oct 1993 16:58 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    |
    44 km (27 mi) distance
    | USGS | Details
  • 01 Oct 1993 04:50 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 25 Sep 1993 11:33 UTC
    | M 5.2 |
    116.2 km (72.2 mi) depth
    |
    91 km (57 mi) distance
    | USGS | Details
  • 19 Sep 1993 19:38 UTC
    | M 4.8 |
    70.4 km (43.7 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 18 Sep 1993 00:34 UTC
    | M 5.0 |
    41.3 km (25.7 mi) depth
    |
    39 km (24 mi) distance
    | USGS | Details
  • 23 Aug 1993 21:02 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    60 km (38 mi) distance
    | USGS | Details
  • 20 Aug 1993 11:23 UTC
    | M 5.5 |
    22.9 km (14.2 mi) depth
    |
    15 km (10 mi) distance
    | USGS | Details
  • 28 Jun 1993 04:53 UTC
    | M 5.1 |
    27.4 km (17 mi) depth
    |
    96 km (59 mi) distance
    | USGS | Details
  • 20 Jun 1993 04:49 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 12 Jun 1993 07:42 UTC
    | M 4.8 |
    128.6 km (79.9 mi) depth
    |
    40 km (25 mi) distance
    | USGS | Details
  • 06 Jun 1993 02:57 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    |
    78 km (49 mi) distance
    | USGS | Details
  • 25 May 1993 16:08 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    6 km (4 mi) distance
    | USGS | Details
  • 23 May 1993 19:52 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 17 May 1993 21:30 UTC
    | M 4.4 |
    33 km (20.5 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 17 May 1993 18:00 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    53 km (33 mi) distance
    | USGS | Details
  • 17 May 1993 10:28 UTC
    | M 4.4 |
    136.3 km (84.7 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 17 May 1993 02:42 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    31 km (19 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Strong mag. 6.6 earthquake - Tonga (Samoa) on Sunday, 16 May 1993 at 21:44 (GMT)
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