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Strong mag. 6.5 earthquake - Fiji Islands Region, Tonga, on Saturday, 24 April 2021 at 00:23 (GMT) - information

Strong mag. 6.5 earthquake - South Pacific Ocean, 282 km northwest of Nukalofa, Nuku'alofa, Tongatapu, on 24 Apr 1:23 pm (GMT +13)

Strong mag. 6.5 earthquake - South Pacific Ocean, 282 km northwest of Nukalofa, Nuku\'alofa, Tongatapu, on 24 Apr 1:23 pm (GMT +13) Strong mag. 6.5 earthquake - South Pacific Ocean, 282 km northwest of Nukalofa, Nuku\'alofa, Tongatapu, on 24 Apr 1:23 pm (GMT +13)

Strong magnitude 6.5 earthquake at 283 km depth

24 Apr 00:32 UTC: First to report: GFZ after 8 minutes.
24 Apr 00:33: Magnitude recalculated from 6.1 to 6.2. Hypocenter depth recalculated from 299.0 to 291.0 km (from 186 to 181 mi). Epicenter location corrected by 20 km (13 mi) towards W.
24 Apr 05:02: Magnitude recalculated from 6.2 to 6.5. Hypocenter depth recalculated from 291.0 to 283.0 km (from 181 to 176 mi). Epicenter location corrected by 16 km (10.1 mi) towards WNW.

Earthquake details

Date & timeApr 24, 2021 00:23:37 UTC
Local time at epicenter24 Apr 1:23 pm (GMT +13)
Depth283.0 km
Epicenter latitude / longitude18.84°S / 176.34°W (South Pacific Ocean, Tonga)
Antipode18.84°N / 3.66°E
Shaking intensityVery weak shaking
Felt1 report
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoMetis Shoal (Lateiki) (125 km / 78 mi)
Nearby towns and cities235 km (146 mi) WNW of Bangai (Pangai) (pop: 1,740) | Show on map | Quakes nearby
249 km (155 mi) W of Neiafu (pop: 4,320) | Show on map | Quakes nearby
282 km (175 mi) NNW of Nukalofa (Nuku'alofa) (pop: 22,400) | Show on map | Quakes nearby
282 km (175 mi) NNW of Nuku‘alofa (pop: 22,400) | Show on map | Quakes nearby
288 km (179 mi) NNW of Kolonga (pop: 1,100) | Show on map | Quakes nearby
313 km (195 mi) NNW of ‘Ohonua (Ohonua) (pop: 1,240) | Show on map | Quakes nearby
419 km (261 mi) SW of Hihifo (pop: 815) | Show on map | Quakes nearby
286 km (178 mi) NNW of Amsterdam Island (pop: 75,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 27.5°C (81 F), humidity: 73%, wind: 5 m/s (9 kts) from ESE
Estimated seismic energy released3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 atomic bombs!) | 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.
6.5283 kmFiji Islands Region, TongaGFZ
6.4273 kmFIJI REGION, TongaEMSC
6.1282 kmNear Nouméa, TongaRENASS
6.2302 kmFiji Islands Region, TongaBMKG
6.5281 kmFiji Islands Region, TongaGeoAu
6.4259 kmTonga [Sea]INGV
6.5301 km223 Km WNW of Pangai, TongaUSGS


Seismic station: Tucson, Arizona (TUC/IU network) | Distance from quake: 8994 km / 5589 mi | Show on map | Station Info
Seismic station Tucson, Arizona: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.02-2.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Mark as helpful or interesting.
Send your own user report!
Leimatua Vavau (246.6 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short : I heard the noise for quite a long time before I felt the swaying. Because of the nose I was waiting for the movement and then felt it. The lights in the room swayed a little but the girl with me neither heard nor felt it | 21 users found this interesting.  


[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Sep 9, 2021 04:59
1 year 28 weeks ago

10 km
South Pacific Ocean, 228 km NW of Nukalofa, Nuku'alofa, TongatapuMore
Sep 7, 2021 09:49
1 year 28 weeks ago

10 km
South Pacific Ocean, 215 km NW of Nukalofa, Nuku'alofa, TongatapuMore
Jun 26, 2021 02:16
1 year 38 weeks ago

265 km
South Pacific Ocean, 235 km N of Nukalofa, Nuku'alofa, TongatapuMore
May 6, 2021 23:26
1 year 46 weeks ago

574 km
South Pacific Ocean, FijiMore

Earlier earthquakes in the same area

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