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Moderate mag. 4.8 earthquake - South Pacific Ocean, Tonga, on Thursday, Oct 21, 2021 at 4:37 pm (GMT +13) -

Moderate mag. 4.8 earthquake - South Pacific Ocean, Tonga, on Thursday, Oct 21, 2021 at 4:37 pm (GMT +13) Moderate mag. 4.8 earthquake - South Pacific Ocean, Tonga, on Thursday, Oct 21, 2021 at 4:37 pm (GMT +13)

Moderate magnitude 4.8 earthquake at 10 km depth

21 Oct 04:00 UTC: First to report: USGS after 23 minutes.
22 Oct 01:48: Epicenter location corrected by 4.5 km (2.8 mi) towards SSW.
Date & time: Oct 21, 2021 03:37:20 UTC -
Local time at epicenter: Thursday, Oct 21, 2021 at 4:37 pm (GMT +13)
Magnitude: 4.8
Depth: 10.0 km
Epicenter latitude / longitude: 16.8559°S / 172.7038°W (South Pacific Ocean, Tonga)
Antipode: 16.856°N / 7.296°E
Nearest volcano: Tafahi (155 km / 96 mi)
Nearby towns and cities:
154 km (96 mi) SE of Hihifo (pop: 815) --> See nearby quakes!
241 km (150 mi) NE of Neiafu (pop: 4,320) --> See nearby quakes!
344 km (214 mi) S of Mulifanua (Samoa) (pop: 4,510) --> See nearby quakes!
351 km (218 mi) SSW of Apia (Samoa) (pop: 40,400) --> See nearby quakes!
352 km (219 mi) SW of Tāfuna (Tualauta, American Samoa) (pop: 11,000) --> See nearby quakes!
358 km (222 mi) SW of Pago Pago (Ma'Oputasi, American Samoa) (pop: 11,500) --> See nearby quakes!
371 km (231 mi) S of Asau (Samoa) (pop: 6,640) --> See nearby quakes!
372 km (231 mi) NNE of Pangai (pop: 1,740) --> See nearby quakes!
383 km (238 mi) NW of Alofi (Niue) (pop: 624) --> See nearby quakes!
545 km (339 mi) SE of Mata-Utu (Hahake, Wallis & Futuna) (pop: 1,200) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 25.9°C (79 F), humidity: 69%, wind: 9 m/s (17 kts) from ESE
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) | about seismic energy
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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.
Mag.DepthLocationSource
4.810 km153 Km SE of Hihifo, TongaUSGS
4.810 kmTONGAEMSC

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.
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