Strong mag. 6.1 earthquake - Tonga on Sunday, 5 August 1973 at 15:47 (GMT)

Strong mag. 6.1 earthquake  - Tonga on Sunday, 5 August 1973 at 15:47 (GMT)

Strong magnitude 6.1 earthquake at 33 km depth

Date & time: 5 Aug 1973 03:47:32 UTC###AGESTRINGCOPY###
Magnitude: 6.1
Depth: 33.0 km
Epicenter latitude / longitude: 16.231°S / 173.11°W (Tonga)
Nearest volcano: Tafahi (78 km / 48 mi)
Nearby towns and cities:
80 km (49 mi) ESE of Hihifo (pop: 815)
285 km (177 mi) NNE of Neiafu (pop: 4,320)
291 km (181 mi) SSW of Mulifanua (Samoa) (pop: 4,510)
303 km (188 mi) SSW of Apia (Samoa) (pop: 40,400)
332 km (206 mi) SW of Tāfuna (Tualauta, American Samoa) (pop: 11,000)
420 km (261 mi) NNE of Pangai (pop: 1,740)
589 km (366 mi) NNE of Nuku'alofa (pop: 22,400)
589 km (366 mi) NNE of Lapaha (pop: 8,000)
Primary data source: USGS
Estimated released energy: 8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 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.
M 6.133 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 6.1 quake Tonga 5 August 15:47 UTC

More info
Recorded aftershocks, latest first (4 quakes):
  • 25 Jan 1974 22:40 UTC
    | M 5.2 |
    10 km (6.2 mi) depth
    66 km (41 mi) distance
    | USGS | Details
  • 19 Dec 1973 16:32 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    63 km (39 mi) distance
    | USGS | Details
  • 09 Nov 1973 08:08 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    57 km (36 mi) distance
    | USGS | Details
  • 07 Oct 1973 07:36 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    45 km (28 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Strong mag. 6.1 earthquake - Tonga on Sunday, 5 August 1973 at 15:47 (GMT)
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