Moderate mag. 5.8 earthquake - South Pacific Ocean, 220 km southwest of Apia, Tuamasaga, Samoa, on Friday, 31 May 1963 at 23:58 (GMT)

Moderate mag. 5.8 earthquake - South Pacific Ocean, 220 km southwest of Apia, Tuamasaga, Samoa, on Friday, 31 May 1963 at 23:58 (GMT)

Moderate magnitude 5.8 earthquake at 15 km depth

Date & time: 31 May 1963 23:58:48 UTC
Magnitude: 5.8
Depth: 15.0 km
Epicenter latitude / longitude: 15.262°S / 173.174°W (South Pacific Ocean, Samoa)
Nearest volcano: West Mata (64 km / 40 mi)
Nearby towns and cities:
102 km (63 mi) NE of Hihifo (Tonga) (pop: 815) --> See nearby quakes!
192 km (119 mi) SSW of Vailoa (pop: 769) --> See nearby quakes!
201 km (125 mi) SW of Mulifanua (pop: 4,510) --> See nearby quakes!
202 km (126 mi) SSW of Asau (pop: 6,640) --> See nearby quakes!
209 km (130 mi) SW of Fasito‘outa (pop: 2,100) --> See nearby quakes!
218 km (135 mi) SSW of Safotu (pop: 1,210) --> See nearby quakes!
220 km (136 mi) SW of Apia (pop: 40,400) --> See nearby quakes!
229 km (142 mi) SW of Lufilufi (pop: 1,070) --> See nearby quakes!
283 km (176 mi) WSW of Tāfuna (Tualauta, American Samoa) (pop: 11,000) --> See nearby quakes!
287 km (179 mi) WSW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1013 joules (8.78 gigawatt hours, equivalent to 7558 tons of TNT or 0.5 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 5.815 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 5.8 quake South Pacific Ocean, 220 km southwest of Apia, Tuamasaga, Samoa, 31 May 1963 23:58 GMT

More info
Recorded aftershocks, latest first (3 quakes):
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Earlier earthquakes in the same area

Moderate mag. 5.8 earthquake - South Pacific Ocean, 220 km southwest of Apia, Tuamasaga, Samoa, on Friday, 31 May 1963 at 23:58 (GMT)
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