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 Pangai, Ha‘apai, Tonga, on Thursday, October 1, 2020 at 01:13 (GMT)

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Very strong mag. 6.4 earthquake - South Pacific Ocean, 42 km northeast of 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.
Date & time: Oct 1, 2020 01:13:36 UTC -
Magnitude: 6.4
Depth: 28.0 km
Epicenter latitude / longitude: 19.5355°S / 174.0834°W (South Pacific Ocean, Tonga)
Antipode: 19.536°N / 5.917°E
Nearest volcano: Late (113 km / 70 mi)
Nearby towns and cities:
42 km (26 mi) NE of Pangai (pop: 1,740) --> See nearby quakes!
99 km (62 mi) S of Neiafu (pop: 4,320) --> See nearby quakes!
205 km (127 mi) NNE of Kolonga (pop: 1,100) --> See nearby quakes!
213 km (132 mi) NNE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
213 km (132 mi) NNE of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
219 km (136 mi) NNE of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
399 km (248 mi) S of Hihifo (pop: 815) --> See nearby quakes!
216 km (134 mi) NNE of Amsterdam Island (pop: 75,000) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 28°C (82 F), humidity: 83%, wind: 4 m/s (7 kts) from N
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 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.
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

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 over and onto the floor, the car parked outside was shaking | 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)  
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Aftershocks

[More info]

Recorded aftershocks, latest first (14 quakes)

Date and timeMag
Depth
LocationDetails
Mar 23, 2021 01:47
37 weeks ago
4.6

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

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

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

10 km
South Pacific Ocean, 53 km SE of Neiafu, Vava‘u, TongaMore
Feb 3, 2021 11:11
44 weeks ago
5.1

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

10 km
South Pacific Ocean, 61 km E of Pangai, Ha‘apai, TongaMore
Dec 5, 2020 22:57
1 year 0 weeks ago
4.5

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

35 km
South Pacific Ocean, 77 km S of Neiafu, Vava‘u, TongaMore
Oct 20, 2020 18:57
1 year 7 weeks ago
5.0

35 km
South Pacific Ocean, 49 km NE of Pangai, Ha‘apai, TongaMore
Oct 17, 2020 05:19
1 year 7 weeks ago
4.9

10 km
South Pacific Ocean, 125 km SE of Neiafu, Vava‘u, TongaMore
Oct 9, 2020 17:01
1 year 8 weeks ago
4.8

10 km
South Pacific Ocean, 50 km S of Neiafu, Vava‘u, TongaMore
Oct 5, 2020 01:10
1 year 9 weeks ago
4.9

10 km
South Pacific Ocean, 52 km NE of Pangai, Ha‘apai, TongaMore
Oct 4, 2020 23:20
1 year 9 weeks ago
5.2

10 km
South Pacific Ocean, 91 km E of Pangai, Ha‘apai, TongaMore
Oct 2, 2020 17:12
1 year 9 weeks ago
4.9

10 km
South Pacific Ocean, 46 km N of Pangai, Ha‘apai, TongaMore

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