Major magnitude 6.8 earthquake - North Pacific Ocean, 290 km east of Tokyo, Japan, on Wednesday, November 9, 1938 at 09:15 (GMT)

Major magnitude 6.8 earthquake - North Pacific Ocean, 290 km east of Tokyo, Japan, on Wednesday, November 9, 1938 at 09:15 (GMT)

Major magnitude 6.8 earthquake at 15 km depth

Date & time: Nov 9, 1938 09:15:53 UTC
Magnitude: 6.8
Depth: 15.0 km
Epicenter latitude / longitude: 36.474°N / 142.769°E (North Pacific Ocean, Japan)
Antipode: 36.474°S / 37.231°W
Nearby towns and cities:
180 km (112 mi) ESE of Iwaki (pop: 357,300) --> See nearby quakes!
184 km (114 mi) E of Kitaibaraki (pop: 50,800) --> See nearby quakes!
185 km (115 mi) E of Takahagi (pop: 33,600) --> See nearby quakes!
190 km (118 mi) E of Hitachi (pop: 186,300) --> See nearby quakes!
192 km (120 mi) ENE of Hasaki (pop: 39,200) --> See nearby quakes!
197 km (122 mi) E of Funaishikawa (Naka-gun) (pop: 35,300) --> See nearby quakes!
199 km (124 mi) ENE of Kashima-shi (pop: 65,800) --> See nearby quakes!
208 km (129 mi) E of Mito (pop: 246,500) --> See nearby quakes!
290 km (180 mi) ENE of Tokyo (pop: 8,336,600) --> See nearby quakes!
304 km (189 mi) ENE of Yokohama (pop: 3,574,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 1015 joules (278 gigawatt hours, equivalent to 2.4 x 105 tons of TNT or 14.9 atomic bombs!) More info
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.
6.815 kmoff the east coast of Honshu, JapanUSGS
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


[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Feb 16, 1939 18:51
83 years ago

35 km
North Pacific Ocean, 249 km NE of Tokyo, JapanMore
Nov 30, 1938 02:29
83 years ago

30 km
North Pacific Ocean, 263 km NE of Tokyo, JapanMore
Nov 22, 1938 01:14
83 years ago

25 km
North Pacific Ocean, 275 km NE of Tokyo, JapanMore
Nov 13, 1938 22:31
83 years ago

35 km
North Pacific Ocean, 307 km E of Tokyo, 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!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.