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Strong mag. 6.0 earthquake - South Pacific Ocean, New Zealand, on Tuesday, Sep 21, 2021 at 6:08 am (GMT +12) -

Strong mag. 6.0 earthquake - South Pacific Ocean, New Zealand, on Tuesday, Sep 21, 2021 at 6:08 am (GMT +12) Strong mag. 6.0 earthquake - South Pacific Ocean, New Zealand, on Tuesday, Sep 21, 2021 at 6:08 am (GMT +12)

Strong magnitude 6.0 earthquake at 406 km depth

20 Sep 18:12 UTC: First to report: GEONET (NZ) after 4 minutes.
20 Sep 18:13: Magnitude recalculated from 6.1 to 6.4. Hypocenter depth recalculated from 376.0 to 376.7 km (from 234 to 234 mi). Epicenter location corrected by 4.9 km (3 mi) towards ESE.
20 Sep 18:24: Magnitude recalculated from 6.4 to 5.7. Hypocenter depth recalculated from 376.7 to 405.5 km (from 234 to 252 mi). Epicenter location corrected by 69 km (43 mi) towards WNW.
20 Sep 18:27: Magnitude recalculated from 5.7 to 6.0.

Earthquake details

Date & timeSep 20, 2021 18:08:17 UTC -
Local time at epicenterTuesday, Sep 21, 2021 at 6:08 am (GMT +12)
StatusConfirmed
Magnitude6
Depth405.5 km
Epicenter latitude / longitude31.92156°S / 179.97745°W (South Pacific Ocean, New Zealand)
Antipode31.922°N / 0.023°E
Shaking intensityLight shaking
Felt24 reports
Primary data sourceGEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)
Nearest volcanoVolcano W (47 km / 29 mi)
Nearby towns and cities
Weather at epicenter at time of quakeBroken Clouds 16.4°C (62 F), humidity: 76%, wind: 7 m/s (14 kts) from WNW
Estimated seismic energy released6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 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.
Mag.DepthLocationSource
6.0406 kmNew ZealandGEONET (NZ)
5.2400 kmKermadec Islands RegionUSGS
5.3422 kmKermadec Islands RegionGeoAu
5.1507 kmNear AucklandRENASS

Seismograms

Seismic station: South Karori, New Zealand (SNZO/IU network) | Distance from quake: 1146 km / 712 mi | Show on map | Station Info
Seismic station South Karori, New Zealand: 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 (28)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Tallarook (3236.7 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Shaking | One user found this interesting.  
near Eltham, South Taranaki District, Taranaki (988.6 km SSW of epicenter) [Map] / Moderate shaking (MMI V) / complex motion difficult to describe / 5-10 s : Moderate shaking.  
near Kinglake, Murrindindi, Victoria (3221.5 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s
The Pocket NSW (2574 km W of epicenter) [Map] / not felt : I didn’t feel it  
Melton Victoria 3337 (3282.9 km WSW of epicenter) [Map] / not felt / horizontal (sideways) swinging / 5-10 s
Melbourne / Moderate shaking (MMI V) / vibration and rolling / very short
Carlton (3246.2 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 15-20 s
Melbourne (3243.7 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 15-20 s : Ggf  
Hampton Park victors / Moderate shaking (MMI V) / vibration and rolling / 5-10 s : things fell of shelves  
Mill Park (3239.5 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 15-20 s : The intensity was somewhat weak as I did not know it was an earthquake at first (I thought we had strong winds). The windows rattled and the floor vibrated for around 20 seconds, so we hid under the table until it stopped. Nothing fell off the shelves and  
Traralgon (3111.8 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
1a Vaughan road thurgoona nsw Australia (3239.2 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
Melbourne / Light shaking (MMI IV) / rattling, vibrating / 10-15 s
Newcastle, Australia (2644.9 km W of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 15-20 s
Townsville, Queensland (3614.6 km WNW of epicenter) [Map] / not felt
Melbourne Victoria / Weak shaking (MMI III) / rattling, vibrating / 20-30 s : Everything shook  
Geelong / Moderate shaking (MMI V) / both vertical and horizontal swinging / 5-10 s
Mentone (3233.6 km WSW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s : Whole building shook for 15-20 seconds  
Melbourne / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
Melbourne (3248.5 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Just a bit of shaking not to sure if this is the same one or a different one cause it’s a bit old but there was a tremor across Victoria  
Vermont (3226.9 km WSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 20-30 s
3925 (3216.9 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s
Bendigo / Light shaking (MMI IV) / single lateral shake / 1-2 s
3850 / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
Carrum Downs / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : Medium shaking  
Rowville / Light shaking (MMI IV) / vibration and rolling / 10-15 s
Melton Victoria 3337 (3282.9 km WSW of epicenter) [Map] / not felt / horizontal (sideways) swinging / 5-10 s
taylor’s lakes / Light shaking (MMI IV) / 5-10 s
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Aftershocks

[More info]

Recorded aftershocks, latest first (42 quakes)

Date and timeMag
Depth
LocationDetails
Mar 17, 2022 03:42
27 weeks ago
4.9

244 km
South Pacific Ocean, 732 km NE of Whakatane, Bay of Plenty, New ZealandMore
Mar 5, 2022 09:34
29 weeks ago
3.8

500 km
South Pacific Ocean, New ZealandMore
Mar 3, 2022 12:58
29 weeks ago
4.4

359 km
South Pacific Ocean, New ZealandMore
Mar 2, 2022 08:12
30 weeks ago
4.8

354 km
South Pacific Ocean, New ZealandMore
Feb 24, 2022 21:00
30 weeks ago
4.5

300 km
South Pacific Ocean, New ZealandMore
Feb 18, 2022 15:13
31 weeks ago
4.7

305 km
South Pacific Ocean, New ZealandMore
Feb 15, 2022 14:00
32 weeks ago
4.3

400 km
South Pacific OceanMore
Feb 11, 2022 18:09
32 weeks ago
4.7

400 km
South Pacific OceanMore
Feb 9, 2022 08:23
33 weeks ago
4.5

421 km
South Pacific OceanMore
Feb 7, 2022 06:01
33 weeks ago
4.8

360 km
South Pacific OceanMore
Feb 6, 2022 07:42
33 weeks ago
4.5

414 km
South Pacific OceanMore
Feb 5, 2022 04:38
33 weeks ago
4.8

370 km
South Pacific Ocean, New ZealandMore
Jan 29, 2022 18:20
34 weeks ago
4.1

357 km
South Pacific Ocean, New ZealandMore
Jan 29, 2022 11:00
34 weeks ago
4.3

464 km
South Pacific OceanMore
Jan 26, 2022 03:01
35 weeks ago
4.3

247 km
South Pacific Ocean, New ZealandMore
Jan 24, 2022 11:23
35 weeks ago
4.5

409 km
South Pacific OceanMore
Jan 24, 2022 10:30
35 weeks ago
4.2

500 km
South Pacific OceanMore
Jan 21, 2022 08:31
35 weeks ago
4.0

445 km
South Pacific Ocean, New ZealandMore
Jan 14, 2022 23:31
36 weeks ago
4.8

500 km
South Pacific OceanMore
Jan 7, 2022 23:19
37 weeks ago
4.2

300 km
South Pacific OceanMore
Jan 7, 2022 19:52
37 weeks ago
4.4

272 km
South Pacific OceanMore
Dec 26, 2021 22:18
39 weeks ago
3.7

426 km
South Pacific OceanMore
Dec 26, 2021 04:52
39 weeks ago
3.9

500 km
South Pacific OceanMore
Dec 24, 2021 23:36
39 weeks ago
4.0

300 km
South Pacific OceanMore
Dec 20, 2021 14:47
40 weeks ago
4.4

483 km
South Pacific OceanMore
Dec 20, 2021 11:57
40 weeks ago
4.9

272 km
South Pacific Ocean, New ZealandMore
Dec 8, 2021 17:52
42 weeks ago
4.7

345 km
South Pacific Ocean, New ZealandMore
Dec 4, 2021 17:23
42 weeks ago
4.6

10 km
South Pacific Ocean, New ZealandMore
Dec 4, 2021 06:44
42 weeks ago
4.0

500 km
South Pacific Ocean, New ZealandMore
Dec 3, 2021 23:15
42 weeks ago
4.0

458 km
South Pacific OceanMore
Nov 30, 2021 22:41
43 weeks ago
4.8

260 km
South Pacific OceanMore
Nov 29, 2021 09:58
43 weeks ago
4.5

375 km
South Pacific Ocean, New ZealandMore
Nov 28, 2021 08:14
43 weeks ago
4.5

300 km
South Pacific OceanMore
Nov 5, 2021 08:42
46 weeks ago
4.5

351 km
South Pacific Ocean, New ZealandMore
Nov 1, 2021 22:47
47 weeks ago
4.4

415 km
South Pacific OceanMore
Oct 20, 2021 16:12
49 weeks ago
4.7

271 km
South Pacific Ocean, New ZealandMore
Oct 11, 2021 15:14
50 weeks ago
4.4

495 km
South Pacific Ocean, New ZealandMore
Oct 10, 2021 11:02
50 weeks ago
4.2

436 km
South Pacific OceanMore
Oct 8, 2021 15:56
50 weeks ago
4.1

517 km
South Pacific Ocean, New ZealandMore
Oct 4, 2021 20:31
51 weeks ago
4.6

271 km
South Pacific Ocean, New ZealandMore
Oct 1, 2021 04:30
51 weeks ago
4.2

376 km
South Pacific Ocean, New ZealandMore
Sep 20, 2021 18:08
1 year 1 weeks ago
5.1

425 km
South Pacific OceanMore

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