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Strong mag. 6.4 earthquake - 41 Km NE of Pangai, Tonga on Thursday, 1 October 2020 - information

Very strong mag. 6.4 earthquake - South Pacific Ocean, 42 km northeast of Bangai, Pangai, Ha‘apai, Tonga, on Thursday, October 1, 2020 at 01:13 GMT

Very strong mag. 6.4 earthquake - South Pacific Ocean, 42 km northeast of Bangai, Pangai, Ha‘apai, Tonga, on Thursday, October 1, 2020 at 01:13 GMT Very strong mag. 6.4 earthquake - South Pacific Ocean, 42 km northeast of Bangai, Pangai, Ha‘apai, Tonga, on Thursday, October 1, 2020 at 01:13 GMT

Very strong magnitude 6.4 earthquake at 28 km depth

1 Oct 01:21 UTC: First to report: USGS after 8 minutes.
1 Oct 01:24: Epicenter location corrected by 5 km (3.1 mi) towards NE.
... [show all] ...
2 Oct 02:20: Hypocenter depth recalculated from 35.0 to 28.0 km (from 22 to 17.4 mi). Epicenter location corrected by 15.6 km (9.7 mi) towards ESE.

Earthquake details

Date & timeOct 1, 2020 01:13:36 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.4
Depth28.0 km
Epicenter latitude / longitude19.5355°S / 174.0834°W (South Pacific Ocean, Tonga)
Antipode19.536°N / 5.917°E
Shaking intensityModerate shaking
Felt9 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoLate (113 km / 70 mi)
Nearby towns and cities42 km (26 mi) NE of Bangai (Pangai) (pop: 1,740) | Show on map | Quakes nearby
99 km (62 mi) S of Neiafu (pop: 4,320) | Show on map | Quakes nearby
205 km (127 mi) NNE of Kolonga (pop: 1,100) | Show on map | Quakes nearby
213 km (132 mi) NNE of Nukalofa (Nuku'alofa) (pop: 22,400) | Show on map | Quakes nearby
213 km (132 mi) NNE of Nuku‘alofa (pop: 22,400) | Show on map | Quakes nearby
219 km (136 mi) NNE of ‘Ohonua (Ohonua) (pop: 1,240) | Show on map | Quakes nearby
399 km (248 mi) S of Hihifo (pop: 815) | Show on map | Quakes nearby
216 km (134 mi) NNE of Amsterdam Island (pop: 75,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 28°C (82 F), humidity: 83%, wind: 4 m/s (7 kts) from N
Estimated seismic energy released2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 atomic bombs!) | about seismic energy
Show interactive Map
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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
6.428 km41 Km NE of Pangai, TongaUSGS
6.549 km39 Km N of Pangai, TongaGFZ
6.510 km6.4 TongaEMSC
6.642 km32 Km NNE of Pangai, TongaGeoAu
6.520 kmTonga Islands [Sea: Tonga]INGV
6.5109 km39 Km N of Pangai, TongaBMKG

Seismograms

Seismic station: Funafuti, Tuvalu (FUNA/IU network) | Distance from quake: 1422 km / 884 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 (13)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Neiafu, Vava‘u (104.3 km N of epicenter) [Map] / Strong shaking (MMI VI) / rattling, vibrating / 15-20 s : Definitely strong shaking but no damage found so far. I wondered if my 3 storey house was going to survive. And could hear the water sloshing in the solar storage on the roof. Felt all at sea. | 4 users found this interesting.  
Brawley ca (21 km WNW of epicenter) [Map] / Very strong shaking (MMI VII) / horizontal (sideways) swinging / 20-30 s : Since 5pm thru 730 every 5 to 10 minutes shaking then at 745 & 845 2.7 hits | 2 users found this interesting.  
Nuku‘alofa, Tongatapu (213.1 km SSW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Nukualofa (213.5 km SSW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s
Neiafu town center / Moderate shaking (MMI V) / both vertical and horizontal swinging / 15-20 s : It was more of a light maybe a little more but not quiet as strong as moderate shacking, Our shop all items hanging were shaking, and the cans and tubes or marine sealants,cleaners,aersoals fell ov | 6 users found this interesting.  
Alofi Niue / Weak shaking (MMI III) / 10-15 s : Very short but noticeable. My chair was trembling for about 10 to 15 seconds. | 3 users found this interesting.  
Paliati, alofi north,niue / Weak shaking (MMI III) / 2-5 s : Heard noises from the roof. Plastic desk is shaking a little bit | 2 users found this interesting.  
Mu'a, Tonga / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s
Fua'amotu at Kupesi Hotel / not felt : I didn't feel anything  
Palmerston North / not felt
Burnaby bc Canada / not felt
Island of Vava'u, Tonga / Strong shaking (MMI VI) / rattling, vibrating / 20-30 s
Haveluloto (Tonga, 215 km SW of epicenter) : Around 20 sec. no significant local damage. (reported through EMSC)  

Aftershocks

[More info]

Recorded aftershocks, latest first (14 quakes)

Date and timeMag
Depth
LocationDetails
Mar 23, 2021 01:47
1 year 36 weeks ago
4.6

171 km
South Pacific Ocean, 174 km N of Nukalofa, Nuku'alofa, TongatapuMore
Mar 23, 2021 01:46
1 year 36 weeks ago
4.8

10 km
South Pacific Ocean, 260 km NE of Nukalofa, Nuku'alofa, TongatapuMore
Feb 18, 2021 16:04
1 year 41 weeks ago
5.2

10 km
South Pacific Ocean, 252 km NE of Nukalofa, Nuku'alofa, TongatapuMore
Feb 16, 2021 15:54
1 year 41 weeks ago
5.3

10 km
South Pacific Ocean, 53 km SE of Neiafu, Vava'u, TongaMore
Feb 3, 2021 11:11
1 year 43 weeks ago
5.1

10 km
South Pacific Ocean, 153 km NE of Nukalofa, Nuku'alofa, TongatapuMore
Jan 16, 2021 06:36
1 year 46 weeks ago
5.2

10 km
South Pacific Ocean, 61 km E of Bangai, Pangai, Ha‘apai, TongaMore
Dec 5, 2020 22:57
1 year 51 weeks ago
4.5

35 km
South Pacific Ocean, 45 km NE of Bangai, Pangai, Ha‘apai, TongaMore
Dec 2, 2020 16:14
1 year 52 weeks ago
4.5

35 km
South Pacific Ocean, 77 km S of Neiafu, Vava'u, TongaMore
Oct 20, 2020 18:57
2 years ago
5.0

35 km
49 km NE of Bangai, Pangai, Ha‘apai, TongaMore
Oct 17, 2020 05:19
2 years ago
4.9

10 km
125 km SE of Neiafu, Vava'u, TongaMore
Oct 9, 2020 17:01
2 years ago
4.8

10 km
50 km S of Neiafu, Vava'u, TongaMore
Oct 5, 2020 01:10
2 years ago
4.9

10 km
52 km NE of Bangai, Pangai, Ha‘apai, TongaMore
Oct 4, 2020 23:20
2 years ago
5.2

10 km
215 km NE of Nukalofa, Nuku'alofa, TongatapuMore
Oct 2, 2020 17:12
2 years ago
4.9

10 km
46 km N of Bangai, Pangai, Ha‘apai, TongaMore

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