Moderate mag. 5.5 earthquake - Tonga (Samoa) on Wednesday, 15 June 1983 at 06:07 (GMT)

Moderate mag. 5.5 earthquake - Tonga (Samoa) on Wednesday, 15 June 1983 at 06:07 (GMT)

Moderate magnitude 5.5 earthquake at 33 km depth

Date & time: 15 Jun 1983 06:07:54 UTC
Magnitude: 5.5
Depth: 33.0 km
Epicenter latitude / longitude: 15.232°S / 173.631°W (Samoa)
Nearest volcano: West Mata (19 km / 12 mi)
Nearby towns and cities:
217 km (135 mi) SW of Vailoa (pop: 769) --> See nearby quakes!
218 km (136 mi) SSW of Asau (pop: 6,640) --> See nearby quakes!
232 km (144 mi) SW of Mulifanua (pop: 4,510) --> See nearby quakes!
238 km (148 mi) SSW of Safotu (pop: 1,210) --> See nearby quakes!
241 km (150 mi) SW of Fasito‘outa (pop: 2,100) --> See nearby quakes!
254 km (158 mi) SW of Apia (pop: 40,400) --> See nearby quakes!
266 km (165 mi) SW of Lufilufi (pop: 1,070) --> See nearby quakes!
332 km (207 mi) WSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
350 km (217 mi) SE of Mata-Utu (Hahake, Wallis & Futuna) (pop: 1,200) --> See nearby quakes!
580 km (360 mi) NW of Alofi (Niue) (pop: 624) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 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 5.533 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 5.5 quake Tonga (Samoa) 15 June 1983 06:07 GMT

More info
Recorded aftershocks, latest first (1 quakes):
  • 21 Jun 1983 11:36 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

Moderate mag. 5.5 earthquake - Tonga (Samoa) on Wednesday, 15 June 1983 at 06:07 (GMT)
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