Strong mag. 6.0 earthquake - Tonga on Sunday, 3 February 1985 at 04:50 (GMT)

Strong mag. 6.0 earthquake - Tonga on Sunday, 3 February 1985 at 04:50 (GMT)

Strong magnitude 6.0 earthquake at 57 km depth

Date & time: 3 Feb 1985 04:50:55 UTC
Magnitude: 6
Depth: 56.5 km
Epicenter latitude / longitude: 20.547°S / 174.099°W (Tonga)
Nearest volcano: Feinga Seamount (119 km / 74 mi)
Nearby towns and cities:
86 km (53 mi) SSE of Pangai (pop: 1,740) --> See nearby quakes!
120 km (74 mi) ENE of Kolonga (pop: 1,100) --> See nearby quakes!
124 km (77 mi) NE of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
132 km (82 mi) ENE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
132 km (82 mi) ENE of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
211 km (131 mi) S of Neiafu (pop: 4,320) --> See nearby quakes!
468 km (291 mi) WSW of Alofi (Niue) (pop: 624) --> See nearby quakes!
472 km (293 mi) WSW of Hakupu (Niue) (pop: 221) --> See nearby quakes!
481 km (299 mi) WSW of Mutalau (Niue) (pop: 133) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 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 6.057 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 6.0 quake Tonga 3 February 1985 04:50 GMT

More info
Recorded aftershocks, latest first (1 quakes):
  • 17 Jul 1985 15:47 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

Strong mag. 6.0 earthquake - Tonga on Sunday, 3 February 1985 at 04:50 (GMT)
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