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Strong mag. 6.9 earthquake - South Pacific Ocean, New Caledonia, on Saturday, Oct 9, 2021 at 10:58 pm (GMT +12) -

This quake was likely an aftershock of the 7.2 quake South Pacific Ocean Oct 2, 2021 6:29 pm (GMT +12), which had occurred 7 days earlier.
Strong mag. 6.9 earthquake - South Pacific Ocean, New Caledonia, on Saturday, Oct 9, 2021 at 10:58 pm (GMT +12) Strong mag. 6.9 earthquake - South Pacific Ocean, New Caledonia, on Saturday, Oct 9, 2021 at 10:58 pm (GMT +12)

Strong magnitude 6.9 earthquake at 498 km depth

9 Oct 11:07 UTC: First to report: GFZ after 9 minutes.
9 Oct 11:08: Hypocenter depth recalculated from 505.0 to 498.0 km (from 314 to 309 mi). Epicenter location corrected by 5.6 km (3.5 mi) towards WSW.
9 Oct 13:50: Magnitude recalculated from 6.5 to 6.9. Epicenter location corrected by 2.1 km (1.3 mi) towards W.

Earthquake details

Date & timeOct 9, 2021 10:58:29 UTC -
Local time at epicenterSaturday, Oct 9, 2021 at 10:58 pm (GMT +12)
Depth498.0 km
Epicenter latitude / longitude21.18°S / 174.46°E (South Pacific Ocean, New Caledonia)
Antipode21.18°N / 5.54°W
Shaking intensityWeak shaking
Felt3 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities487 km (303 mi) SW of Nadi (Fiji) (pop: 42,300) | Show on map | Quakes nearby
505 km (314 mi) SW of Lautoka (Fiji) (pop: 52,500) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 22.9°C (73 F), humidity: 76%, wind: 8 m/s (15 kts) from SE
Estimated seismic energy released1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 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.
6.9498 kmNew Caledonia: Vanuatu Islands RegionGFZ
6.9520 kmNew Caledonia: Vanuatu RegionUSGS
6.8507 kmNew Caledonia: VANUATU REGIONEMSC
6.8507 kmNew Caledonia: Vanuatu Islands RegionGeoAu
6.9519 kmNew Caledonia: Vanuatu Islands RegionBMKG
6.2483 kmNew Caledonia: Near NouméaRENASS
6.4496 kmNew Caledonia: Fiji [Sea]INGV


Seismic station: Funafuti, Tuvalu (FUNA/IU network) | Distance from quake: 1496 km / 930 mi | Show on map | Station Info
Seismic station Funafuti, Tuvalu: 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (7)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Williamstown, Melbourne, Australia / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : We were lying in bed watching TV. At about 10.50pm the bed wobbled lengthwise about 4-5 times. Nothing else seemed to rattle. A slight bump noise at the beginning otherwise silent. No traffic outside. | 7 users found this interesting.  
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Suva, Fiji (535.4 km NE of epicenter) [Map] / Weak shaking (MMI III) : Weak shaking Felt indoors; hanging objects may swing, vibration similar to passing of light trucks, duration may be estimated, may not be recognized as an earthquake. | 5 users found this interesting.  
SIGATOKA FIJI (464.8 km NE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 minutes
Brisbane, Australia / not felt (reported through our app)
Port-Vila / not felt
Kotara / not felt (reported through our app)
Brisbane / not felt (reported through our app)

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