Strong mag. 6.6 earthquake - South Pacific Ocean, 278 km north of Nuku\'alofa, Tongatapu, on Saturday, 28 April 2012 at 10:08 (GMT)

Strong mag. 6.6 earthquake - South Pacific Ocean, 278 km north of Nuku\'alofa, Tongatapu, on Saturday, 28 April 2012 at 10:08 (GMT)

Strong magnitude 6.6 earthquake at 135 km depth

Date & time: 28 Apr 2012 10:08:08 UTC
Magnitude: 6.6
Depth: 134.7 km
Epicenter latitude / longitude: 18.685°S / 174.705°W (South Pacific Ocean, Tonga)
Nearest volcano: Late (15 km / 9 mi)
Nearby towns and cities:
278 km (173 mi) N of Nuku'alofa (pop: 22,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
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 6.6135 kmTongaUSGS
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 South Pacific Ocean, 278 km north of Nuku'alofa, Tongatapu, 28 April 2012 10:08 GMT

More info
Recorded aftershocks, latest first (20 quakes):
  • 17 Oct 2012 17:23 UTC
    | M 5.5 |
    29.8 km (18.5 mi) depth
    |
    68 km (42 mi) distance
    | USGS | Details
  • 02 Oct 2012 03:33 UTC
    | M 5.0 |
    133.9 km (83.2 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 02 Oct 2012 03:33 UTC
    | M 5.3 |
    96.7 km (60.1 mi) depth
    |
    20 km (13 mi) distance
    | USGS | Details
  • 26 Sep 2012 06:45 UTC
    | M 5.2 |
    162.1 km (100.7 mi) depth
    |
    80 km (50 mi) distance
    | USGS | Details
  • 26 Sep 2012 06:45 UTC
    | M 5.0 |
    162.6 km (101 mi) depth
    |
    75 km (47 mi) distance
    | USGS | Details
  • 24 Sep 2012 14:23 UTC
    | M 4.0 |
    10 km (6.2 mi) depth
    |
    85 km (53 mi) distance
    | USGS | Details
  • 16 Sep 2012 13:06 UTC
    | M 4.5 |
    15.6 km (9.7 mi) depth
    |
    106 km (66 mi) distance
    | USGS | Details
  • 16 Sep 2012 13:02 UTC
    | M 5.0 |
    124.7 km (77.5 mi) depth
    |
    29 km (18 mi) distance
    | USGS | Details
  • 26 Aug 2012 06:37 UTC
    | M 4.5 |
    35 km (21.7 mi) depth
    |
    117 km (73 mi) distance
    | USGS | Details
  • 21 Aug 2012 12:05 UTC
    | M 4.5 |
    223.1 km (138.6 mi) depth
    |
    104 km (65 mi) distance
    | USGS | Details
  • 19 Aug 2012 00:28 UTC
    | M 4.7 |
    30.4 km (18.9 mi) depth
    |
    31 km (19 mi) distance
    | USGS | Details
  • 19 Aug 2012 00:28 UTC
    | M 4.7 |
    32.2 km (20 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Details
  • 09 Aug 2012 19:33 UTC
    | M 4.8 |
    35.6 km (22.1 mi) depth
    |
    83 km (52 mi) distance
    | USGS | Details
  • 08 Aug 2012 13:05 UTC
    | M 4.3 |
    10 km (6.2 mi) depth
    |
    94 km (58 mi) distance
    | USGS | Details
  • 17 Jul 2012 12:45 UTC
    | M 4.3 |
    10 km (6.2 mi) depth
    |
    103 km (64 mi) distance
    | USGS | Details
  • 02 Jul 2012 22:05 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    42 km (26 mi) distance
    | USGS | Details
  • 22 Jun 2012 04:25 UTC
    | M 4.5 |
    167.9 km (104.3 mi) depth
    |
    58 km (36 mi) distance
    | USGS | Details
  • 05 Jun 2012 19:11 UTC
    | M 4.6 |
    35 km (21.7 mi) depth
    |
    88 km (55 mi) distance
    | USGS | Details
  • 31 May 2012 17:29 UTC
    | M 5.0 |
    11.7 km (7.3 mi) depth
    |
    119 km (74 mi) distance
    | USGS | Details
  • 25 May 2012 18:20 UTC
    | M 5.0 |
    35 km (21.7 mi) depth
    |
    114 km (71 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

Strong mag. 6.6 earthquake - South Pacific Ocean, 278 km north of Nuku'alofa, Tongatapu, on Saturday, 28 April 2012 at 10:08 (GMT)
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