Mag. 4.7 earthquake - South Pacific Ocean, 66 km southeast of Hihifo, Niuas, Tonga, on Sunday, 18 October 2015 at 17:51 (GMT)

This quake was likely an aftershock of the 6.0 quake South Pacific Ocean, 45 km southeast of Hihifo, Niuas, Tonga, 18 October 2015 16:18 GMT, which had occurred 1 hour and 33 minutes earlier.
Mag. 4.7 earthquake - South Pacific Ocean, 66 km southeast of Hihifo, Niuas, Tonga, on Sunday, 18 October 2015 at 17:51 (GMT)

Light magnitude 4.7 earthquake at 12 km depth

18 Oct 18:14 UTC: First to report: EMSC after 23 minutes.
Oct 18 21:12: Magnitude recalculated from 4.8 to 4.7.
Hypocenter depth recalculated from 33.0 to 12.0 km.
Date & time: 18 Oct 2015 17:51:31 UTC
Magnitude: 4.7
Depth: 12.0 km
Epicenter latitude / longitude: 16.28°S / 173.28°W (South Pacific Ocean, Tonga)
Nearest volcano: Tafahi (52 km / 32 mi)
Nearby towns and cities:
66 km (41 mi) ESE of Hihifo (pop: 815) --> See nearby quakes!
274 km (170 mi) NNE of Neiafu (pop: 4,320) --> See nearby quakes!
303 km (188 mi) SSW of Mulifanua (Samoa) (pop: 4,510) --> See nearby quakes!
310 km (193 mi) SSW of Fasito‘outa (Samoa) (pop: 2,100) --> See nearby quakes!
315 km (196 mi) SSW of Asau (Samoa) (pop: 6,640) --> See nearby quakes!
317 km (197 mi) SSW of Apia (Samoa) (pop: 40,400) --> See nearby quakes!
350 km (217 mi) SW of Tāfuna (Tualauta, American Samoa) (pop: 11,000) --> See nearby quakes!
355 km (221 mi) SW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
409 km (254 mi) NNE of Pangai (pop: 1,740) --> See nearby quakes!
577 km (359 mi) NNE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) 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 4.712 km TONGAEMSC
M 4.810 km- 47km ESE of Hihifo, TongaUSGS
M 4.710 kmTonga IslandsGFZ
M 5.3 kmSamoa Islands RegionGeoAu
M 5.225 kmTonga IslandsGeoAu

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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Earlier earthquakes in the same area

Mag. 4.7 earthquake - South Pacific Ocean, 66 km southeast of Hihifo, Niuas, Tonga, on Sunday, 18 October 2015 at 17:51 (GMT)
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