Very strong mag. 6.5 earthquake - 133 km south of Obihiro, Hokkaido, Japan, on Sunday, December 6, 1970 at 20:20 GMT

Very strong mag. 6.5 earthquake - 133 km south of Obihiro, Hokkaido, Japan, on Sunday, December 6, 1970 at 20:20 GMT Very strong mag. 6.5 earthquake - 133 km south of Obihiro, Hokkaido, Japan, on Sunday, December 6, 1970 at 20:20 GMT

Very strong magnitude 6.5 earthquake at 40 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.

Earthquake details

Date & timeDec 6, 1970 20:20:52 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.5
Depth40.0 km
Epicenter latitude / longitude41.787°N / 143.742°E (North Pacific Ocean, Japan)
Antipode41.787°S / 36.258°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoShikaribetsu Group (173 km / 107 mi)
Nearby towns and cities129 km (80 mi) ESE of Shizunai-furukawachō (pop: 22,400) | Show on map | Quakes nearby
133 km (83 mi) SSE of Obihiro (pop: 173,900) | Show on map | Quakes nearby
141 km (88 mi) SSE of Otofuke (pop: 40,900) | Show on map | Quakes nearby
142 km (88 mi) SSW of Kushiro (pop: 183,600) | Show on map | Quakes nearby
200 km (124 mi) ESE of Tomakomai (pop: 174,800) | Show on map | Quakes nearby
207 km (128 mi) ESE of Chitose (pop: 92,900) | Show on map | Quakes nearby
225 km (140 mi) S of Kitami (pop: 113,100) | Show on map | Quakes nearby
243 km (151 mi) SE of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
274 km (170 mi) ENE of Aomori (pop: 298,400) | Show on map | Quakes nearby
764 km (474 mi) NNE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
Estimated seismic energy released3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 atomic bombs!) | about seismic energy
Show interactive Map
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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
6.540 kmHokkaido, Japan regionUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
Volcanoes & Earthquakes - new app for Android

Aftershocks

[More info]

Recorded aftershocks, latest first (2 quakes)

Date and timeMag
Depth
LocationDetails
Mar 15, 1971 05:35
51 years ago
5.7

34 km
143 km SE of Obihiro, Hokkaido, JapanMore
Jan 18, 1971 05:02
52 years ago
5.5

45 km
86 km S of Shizunai-furukawachō, Hidaka-gun, Hokkaido, JapanMore

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings