Moderate mag. 5.2 earthquake - South Pacific Ocean, 51 km east of Hihifo, Niuas, Tonga, on Sunday, 18 October 2015 at 16:23 (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 5 minutes earlier.
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Moderate magnitude 5.2 earthquake at 10 km depth
18 Oct 17:16 UTC: First to report: EMSC after 52 minutes.
Oct 18 21:12: Magnitude recalculated from 5.1 to 5.2.
Oct 18 21:12: Magnitude recalculated from 5.1 to 5.2.
Magnitude: 5.2
Depth: 10.0 km
Epicenter latitude / longitude: 16.11°S / 173.35°W
(South Pacific Ocean, Tonga)Nearest volcano: Tafahi (58 km / 36 mi)
Nearby towns and cities:
51 km (32 mi) ESE of Hihifo (pop: 815) --> See nearby quakes!
290 km (180 mi) SSW of Mulifanua (Samoa) (pop: 4,510) --> See nearby quakes!
290 km (180 mi) NNE of Neiafu (pop: 4,320) --> See nearby quakes!
297 km (185 mi) SSW of Fasito‘outa (Samoa) (pop: 2,100) --> See nearby quakes!
298 km (185 mi) SSW of Asau (Samoa) (pop: 6,640) --> See nearby quakes!
305 km (190 mi) SSW of Apia (Samoa) (pop: 40,400) --> See nearby quakes!
344 km (214 mi) SW of Tāfuna (Tualauta, American Samoa) (pop: 11,000) --> See nearby quakes!
350 km (217 mi) SW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
426 km (264 mi) NNE of Pangai (pop: 1,740) --> See nearby quakes!
592 km (368 mi) NNE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
251 km (156 mi) ESE of Niuafo‘ou Island --> See nearby quakes!
298 km (185 mi) SW of Upolu Island --> See nearby quakes!
435 km (270 mi) SE of Îlot Fungalei Island --> See nearby quakes!
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 4 x 1012 joules (1.11 gigawatt hours, equivalent to 951 tons of TNT) More info
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.
| Magnitude | Depth | Location | Source |
| M 5.2 | 10 km | TONGA | EMSC |
| M 5.1 | 10 km | - 53km ESE of Hihifo, Tonga | USGS |
| M 5.3 | km | Samoa Islands Region | GeoAu |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Earlier earthquakes in the same area
Moderate mag. 5.2 earthquake - South Pacific Ocean, 51 km east of Hihifo, Niuas, Tonga, on Sunday, 18 October 2015 at 16:23 (GMT)Click here to search our database for earlier earthquakes in the same area since 1900!
