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Strong mag. 6.1 earthquake - Japan Sea, 269 km northwest of Kanazawa, Ishikawa, Japan, on Wednesday, Sep 29, 2021 at 5:37 pm (GMT +9) -

Strong mag. 6.1 earthquake - Japan Sea, 269 km northwest of Kanazawa, Ishikawa, Japan, on Wednesday, Sep 29, 2021 at 5:37 pm (GMT +9) Strong mag. 6.1 earthquake - Japan Sea, 269 km northwest of Kanazawa, Ishikawa, Japan, on Wednesday, Sep 29, 2021 at 5:37 pm (GMT +9)

Strong magnitude 6.1 earthquake at 366 km depth

29 Sep 08:43 UTC: First to report: VolcanoDiscovery after 6 minutes.
29 Sep 08:46: Now using data updates from GFZ
29 Sep 08:47: Magnitude recalculated from 6.0 to 6.1. Hypocenter depth recalculated from 369.0 to 366.0 km (from 229 to 227 mi). Epicenter location corrected by 1.4 km (0.9 mi) towards SE.

Earthquake details

Date & timeSep 29, 2021 08:37:05 UTC -
Local time at epicenterWednesday, Sep 29, 2021 at 5:37 pm (GMT +9)
StatusConfirmed
Magnitude6.1
Depth366.0 km
Epicenter latitude / longitude38.84°N / 135.45°E (Japan Sea, Japan)
Antipode38.84°S / 44.55°W
Shaking intensityWeak shaking
Felt23 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities239 km (149 mi) NW of Nanao (pop: 45,300) | Show on map | Quakes nearby
269 km (167 mi) NNW of Kanazawa (pop: 458,900) | Show on map | Quakes nearby
270 km (168 mi) NNW of Takaoka (pop: 170,100) | Show on map | Quakes nearby
276 km (172 mi) NNW of Matsutō (pop: 68,200) | Show on map | Quakes nearby
284 km (177 mi) NNW of Toyama (pop: 325,500) | Show on map | Quakes nearby
285 km (177 mi) NNW of Komatsu (pop: 109,000) | Show on map | Quakes nearby
316 km (196 mi) NNW of Fukui-shi (pop: 248,700) | Show on map | Quakes nearby
328 km (204 mi) WNW of Niigata (pop: 505,300) | Show on map | Quakes nearby
513 km (319 mi) NW of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
531 km (330 mi) NW of Yokohama (pop: 3,574,400) | Show on map | Quakes nearby
275 km (171 mi) WNW of Sado Island (pop: 55,200) | Show on map | Quakes nearby
388 km (241 mi) NW of Honshu Island (pop: 104,000,000) | Show on map | Quakes nearby
502 km (312 mi) SW of Okushiri Island (pop: 3,340) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 23.1°C (74 F), humidity: 87%, wind: 9 m/s (17 kts) from SSW
Estimated seismic energy released8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 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
6.1366 kmSea of JapanGFZ
6.9397 kmSEA OF JAPANNIED
6.1362 kmSEA OF JAPANEMSC
5.8354 kmJapan: Near NiigataRENASS
5.9344 kmSea of JapanBMKG
6.1368 km241 Km NNW of Nanao, JapanUSGS
6.2359 kmSea of JapanGeoAu

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 352 km / 219 mi | Show on map | Station Info
Seismic station Matsushiro, Japan: 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 (26)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Shinagawa Tokyo / Light shaking (MMI IV) / single lateral shake / 2-5 s : Building cracked and the shake was noticeable. Knowing the distance from the epicenter now, I was quite a significant quake | 19 users found this interesting.  
Misawa, Aomori (545.8 km ENE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 30-60 s : It was pretty calm. Saw the water in my fish tank moving. | 9 users found this interesting.  
Tokyo (518.4 km SE of epicenter) [Map] / Weak shaking (MMI III) : my floor was shaking and my bag is also shaking | 4 users found this interesting.  
Kawasaki / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I felt a light shaking motion. I had to call out to my wife and ask if we are having a earthquake… she said yes, so um… right… earthquake. | 4 users found this interesting.  
ya mothers room / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : ya mother felt me | 3 users found this interesting.  
Tokyo (519.4 km SE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s : Light horizontal shaking for around 15 seconds, not enough to cause damage but you could tell it was an earthquake | 2 users found this interesting.  
Yokosuka / Very weak shaking (MMI II) / horizontal (sideways) swinging / 20-30 s : Shaking and a feeling of swaying but we are located on 9th floor of a tower. | 2 users found this interesting.  
Yokohama City / Light shaking (MMI IV) / single vertical bump / 30-60 s : Just a bit shake | 2 users found this interesting.  
Shinjuku, tokyo / not felt : I felt nauseous but didn't physically feel any shake. | One user found this interesting.  
Yoyogi Kamizonocho / Weak shaking (MMI III) / single lateral shake / 2-5 s : Small shaking | One user found this interesting.  
Yoyogi Kamizonocho / Weak shaking (MMI III) / single lateral shake / 2-5 s : Small shaking | One user found this interesting.  
Diekirch / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 minutes : very weak shaking | One user found this interesting.  
Tokyo / Weak shaking (MMI III) / horizontal (sideways) swinging / 30-60 s
Tokyo / Weak shaking (MMI III) / horizontal (sideways) swinging / 30-60 s
fairfield OH / not felt
Tokyo / Weak shaking (MMI III) / horizontal (sideways) swinging / 30-60 s
Tama ku, Kawasaki City / Light shaking (MMI IV) / rattling, vibrating / 20-30 s
Misawa (545.4 km ENE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s
odawara / Weak shaking (MMI III) / 2-5 s : weak shaking  
中央区 / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s (reported through our app)
Nishitokyo / Very weak shaking (MMI II) / horizontal (sideways) swinging / 10-15 s
Yono (488.2 km SE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
Vladivostok / not felt (reported through our app)
Ishinomaki / Light shaking (MMI IV) / 2-5 s
Yokohama / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s
Kanazawa (537.9 km SE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
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Aftershocks

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