Major magnitude 7.7 earthquake - Southeast of Loyalty Islands, New Caledonia, on Wednesday, 10 February 2021 at 13:20 (GMT) - information

Major magnitude 7.7 earthquake - South Pacific Ocean, New Caledonia, on Thursday, 11 Feb 2021 12:20 am (GMT +11)

- Major magnitude 7.7 earthquake - South Pacific Ocean, New Caledonia, on Thursday, 11 Feb 2021 12:20 am (GMT +11)

Major magnitude 7.7 earthquake at 29 km depth

10 Feb 13:29 UTC: First to report: GFZ after 9 minutes.
10 Feb 13:31: Magnitude recalculated from 7.4 to 7.3. Epicenter location corrected by 6.5 km (4.1 mi) towards WNW.
... [show all] ...
10 Feb 16:00: Magnitude recalculated from 7.6 to 7.7.
Update Wed, 10 Feb 2021, 19:38
Small tsunami observed
Given the magnitude and relative shallow depth of the quake, a tsunami alert had been issued for coastal areas including New Zealand, New Caledonia, Vanuatu and other islands in the area.
In fact, the quake triggered a small tsunami, which reached maximum wave heights of less than a meter:
In Lenakel (Vanuatu), 0.78 m waves above tide were measured, 75 cm on the Great Barrier Island (New Zealand), 48 cm at Kingston Norfolk Island, and 10-20 cm in various coastal locations of New Caledonia. There are no reports of damages.
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Earthquake data:

Date & time: 10 Feb 2021 13:20:01 UTC -
Local time at epicenter: Thursday, 11 Feb 2021 12:20 am (GMT +11)
Magnitude: 7.7
Depth: 29.0 km
Epicenter latitude / longitude: 22.85°S / 171.45°E (South Pacific Ocean, New Caledonia)
Nearest volcano: Matthew Island (67 km / 42 mi)
Nearby towns and cities:
395 km (246 mi) ESE of Tadine (Maré) (pop: 7,490) --> See nearby quakes!
431 km (268 mi) SSE of Isangel (Vanuatu) (pop: 1,440) --> See nearby quakes!
482 km (300 mi) ESE of Wé (Lifou) (pop: 10,400) --> See nearby quakes!
518 km (322 mi) E of Noumea (pop: 93,100) --> See nearby quakes!
432 km (269 mi) SSE of Tanna Island (pop: 28,800) --> See nearby quakes!
340 km (211 mi) SSE of Aneityum Island (pop: 915) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 26.2°C (79 F), humidity: 82%, wind: 5 m/s (10 kts) from NNW
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 2.2 x 1016 joules (6219 gigawatt hours, equivalent to 5.4 x 106 tons of TNT or 334.4 atomic bombs!) 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 7.729 kmSoutheast of Loyalty Islands, New CaledoniaGFZ
M 7.710 kmSOUTHEAST OF LOYALTY ISLANDS, New CaledoniaEMSC
M 7.629 kmSoutheast of Loyalty Islands, New CaledoniaBMKG
M 7.710 kmSoutheast of the Loyalty Islands, New CaledoniaUSGS
M 7.623 kmSoutheast of Loyalty Islands, New CaledoniaGeoAu
M 7.50.8 kmNew Caledonia [Sea]INGV

User reports for this quake (22)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Collaroy Plateau 2097 Australia (2309.1 km SW of epicenter) [Map] / not felt / rattling, vibrating / 2-5 s : Heard Rumbling sound continuous, too long to be thunder, felt vibration in the ground after the sound. Sound seemed to be coming from south east, although quake was north west. | 5 users found this interesting.
  • 2309km nw of you would put the epicentre near Alice Springs I think the quake was north east of you
Nadi (786.9 km NE of epicenter) [Map] / not felt : Not felt | 4 users found this interesting.
Dinas Cross, Newport Pembrokeshire, Wales, UK SA42 / Very weak shaking (MMI II) / complex motion difficult to describe : Very quiet day in Dinas Croos (Fishguard UK) 10.30 am while sat out on the patio. Noticed our steel garden arch gently vibrating with absolutely no wind blowing that morning. My wife and I watched this for about 4-5 minutes. I said this has to be an earthquake somewhere, the vibrations being detected by the steel arch were quite slow and definately subsonic. | 3 users found this interesting.
Auckland (1563.2 km S of epicenter) [Map] / not felt (reported through our app)
2802.1 km SW of epicenter [Map] / not felt
518.7 km W of epicenter [Map] / not felt (reported through our app)
Auckland (1581.2 km S of epicenter) [Map] / not felt
838.4 km NE of epicenter [Map] / not felt
mont dore (505.4 km W of epicenter) [Map] / not felt (reported through our app)
8216.8 km WNW of epicenter [Map] / not felt
10419.9 km WNW of epicenter [Map] / Very weak shaking (MMI II)
11604.8 km ESE of epicenter [Map] / not felt
SARATOGA (2278.3 km SW of epicenter) [Map] / not felt (reported through our app)
Auckland (1589.1 km S of epicenter) [Map] / not felt
Pymble / not felt
Pasay, Philippines / not felt
New Zealand, Auckland / Very weak shaking (MMI II) / single lateral shake / 1-2 s
Paradise Tasmania Australia / not felt
NOUMEA NEW CALEDONIA / not felt
Taranaki NZ / not felt
Batu Caves / not felt
American Samoa / not felt
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Aftershocks

More info
Recorded aftershocks, latest first (121 quakes):
  • 23 Feb 2021 21:37 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    43 km (27 mi) distance
    | BMKG | Details
  • 22 Feb 2021 08:29 UTC
    | M 4.8 |
    10 km (6.2 mi) depth
    |
    155 km (96 mi) distance
    | USGS | Details
  • 22 Feb 2021 08:18 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    152 km (94 mi) distance
    | USGS | Details
  • 22 Feb 2021 05:17 UTC
    | M 5.5 |
    10 km (6.2 mi) depth
    |
    149 km (92 mi) distance
    | GFZ | Details
  • 21 Feb 2021 22:54 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    63 km (39 mi) distance
    | GFZ | Details
  • 21 Feb 2021 20:36 UTC
    | M 4.5 |
    10 km (6.2 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 21 Feb 2021 19:36 UTC
    | M 4.5 |
    10 km (6.2 mi) depth
    |
    17 km (10 mi) distance
    | EMSC | Details
  • 21 Feb 2021 17:14 UTC
    | M 4.5 |
    10 km (6.2 mi) depth
    |
    72 km (45 mi) distance
    | USGS | Details
  • 19 Feb 2021 08:31 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    76 km (48 mi) distance
    | GFZ | Details
  • 19 Feb 2021 04:10 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    20 km (13 mi) distance
    | USGS | Details
  • 18 Feb 2021 00:37 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    96 km (60 mi) distance
    | USGS | Details
  • 17 Feb 2021 23:35 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    66 km (41 mi) distance
    | USGS | Details
  • 17 Feb 2021 22:49 UTC
    | M 6.1 |
    54.5 km (33.9 mi) depth
    |
    205 km (128 mi) distance
    | GEONET (NZ) | Strong mag. 6.1 earthquake - South Pacific Ocean, New Caledonia, on Thursday, 18 Feb 2021 9:49 am (GMT +11)
  • 17 Feb 2021 15:05 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    103 km (64 mi) distance
    | USGS | Details
  • 17 Feb 2021 12:59 UTC
    | M 5.2 |
    10 km (6.2 mi) depth
    |
    118 km (73 mi) distance
    | USGS | Details
  • 17 Feb 2021 10:51 UTC
    | M 5.0 |
    10 km (6.2 mi) depth
    |
    63 km (39 mi) distance
    | USGS | Details
    • Show all

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Earlier earthquakes in the same area since 1900


Map of earlier quakes

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