Strong mag. 6.3 earthquake - NEAR EAST COAST OF HONSHU, JAPAN, on Sunday, 20 December 2020 at 17:23 (GMT) - information

Strong mag. 6.3 earthquake - North Pacific Ocean, 98 km northeast of Hachinohe, Aomori, Japan, on Monday, 21 Dec 2020 3:23 am (GMT +10)

- Strong mag. 6.3 earthquake  - North Pacific Ocean, 98 km northeast of Hachinohe, Aomori, Japan, on Monday, 21 Dec 2020 3:23 am (GMT +10)

Strong magnitude 6.3 earthquake at 35 km depth

20 Dec 17:32 UTC: First to report: EMSC after 9 minutes.
20 Dec 17:34: Hypocenter depth recalculated from 64.0 to 40.0 km (from 40 to 25 mi). Epicenter location corrected by 9.5 km (5.9 mi) towards SW.
... [show all] ...
20 Dec 22:56: Magnitude recalculated from 6.2 to 6.3. Hypocenter depth recalculated from 40.0 to 35.0 km (from 25 to 22 mi). Epicenter location corrected by 10.3 km (6.4 mi) towards NW.
Update Sun, 20 Dec 2020, 17:36
Significant 6.2 quake hits near Hachinohe, Japan
6.2 quake 21 Dec 3:23 am (GMT +10)
6.2 quake 21 Dec 3:23 am (GMT +10)
An earthquake of magnitude 6.2 occurred only 13 minutes ago 106 km northeast of Hachinohe, Japan, the European-Mediterranean Seismological Centre (EMSC) reported.
The quake hit at a moderately shallow depth of 40 km beneath the epicenter near Hachinohe, Hachinohe Shi, Aomori, Japan, early morning on Monday 21 December 2020 at 3:23 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from Indonesia's Meteorology, Climatology, and Geophysical Agency (BMKG) which listed the quake at magnitude 6.5. Other agencies reporting the same quake include NIED at magnitude 6.6, and German Research Centre for Geosciences (GFZ) at magnitude 6.3.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Hachinohe (pop. 239,000) located 106 km from the epicenter, Misawa (pop. 42,800) 112 km away, Ichinohe (pop. 15,800) 133 km away, Miyako (pop. 51,700) 136 km away, and Mutsu (pop. 49,200) 142 km away, the quake should have been felt as light shaking.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you’re in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.
Download the Volcanoes & Earthquakes app to get one of the fastest seismic alerts online:
Android | IOS

Earthquake data:

Date & time: 20 Dec 2020 17:23:22 UTC -
Local time at epicenter: Monday, 21 Dec 2020 3:23 am (GMT +10)
Magnitude: 6.3
Depth: 35.0 km
Epicenter latitude / longitude: 40.87°N / 142.56°E (North Pacific Ocean, Japan)
Nearest volcano: Osore-yama (141 km / 88 mi)
Nearby towns and cities:
98 km (61 mi) ENE of Hachinohe (pop: 239,000) --> See nearby quakes!
101 km (63 mi) ENE of Misawa (pop: 42,800) --> See nearby quakes!
122 km (76 mi) ESE of Mutsu (pop: 49,200) --> See nearby quakes!
129 km (80 mi) NE of Ichinohe (pop: 15,800) --> See nearby quakes!
146 km (91 mi) NNE of Miyako (pop: 51,700) --> See nearby quakes!
154 km (96 mi) E of Aomori (pop: 298,400) --> See nearby quakes!
177 km (110 mi) NE of Morioka (pop: 295,200) --> See nearby quakes!
179 km (111 mi) E of Hirosaki (pop: 175,000) --> See nearby quakes!
264 km (164 mi) SSE of Sapporo (pop: 1,883,000) --> See nearby quakes!
628 km (390 mi) NNE of Tokyo (pop: 8,336,600) --> See nearby quakes!
350 km (217 mi) S of Hokkaido Island (pop: 5,500,000) --> See nearby quakes!
181 km (112 mi) NNE of Sangan-jima Island --> See nearby quakes!
Weather at epicenter at time of quake:
Light Snow 0.1°C (32 F), humidity: 90%, wind: 13 m/s (25 kts) from WNW
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake 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.
MagnitudeDepthLocationSource
M 6.335 kmNEAR EAST COAST OF HONSHU, JAPANEMSC
M 6.343 kmNear East Coast of Honshu, JapanGFZ
M 6.61.1 kmE OFF AOMORI PREF, JapanNIED
M 6.310 km日本本州东岸近海, JapanCEIC
M 6.335 km98 Km ENE of Hachinohe, JapanUSGS
M 6.420 kmNear East Coast of Eastern Honshu, Japan [Sea: Japan]INGV
M 6.345 kmNear East Coast of Honshu, JapanGeoAu
M 6.310 km日本本州东岸近海, JapanCEIC
M 6.310 km98 Km ENE of Hachinohe, JapanCEIC
M 6.310 km日本本州东岸近海, JapanCEIC
M 6.310 km日本本州东岸近海, JapanCEIC
M 6.310 km日本本州东岸近海, JapanCEIC

User reports for this quake (11)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Hachinohe (101.4 km WSW of epicenter) [Map] / Very strong shaking (MMI VII) / complex motion difficult to describe / 10-15 s : I was watching on demand television during my visit to my step fathers house for Christmas. The earthquake was expected because it was tiny rattling before a huge shake happened. I was able to catch about 5 seconds of the earthquake.
Misawa (108.3 km WSW of epicenter) [Map] / Strong shaking (MMI VI) / both vertical and horizontal swinging / 10-15 s : It was my first earthquake so it was very shocking. Nothing broke but many things fell.
My tv stand after earthquake (public domain)
Misawa, Japan (103.9 km W of epicenter) [Map] / Strong shaking (MMI VI)
100 km WSW of epicenter [Map] / Moderate shaking (MMI V)
166.4 km W of epicenter [Map] / Weak shaking (MMI III) / 2-5 s (reported through our app)
Misawa, Japan (103.9 km W of epicenter) [Map] / Strong shaking (MMI VI)
Misawa (103.9 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s
656.2 km SSW of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
103.6 km WSW of epicenter [Map] / Moderate shaking (MMI V) (reported through our app)
Dodgeville Wisconsin / not felt
Misawa, Japan / Strong shaking (MMI VI) / horizontal (sideways) swinging
Volcanoes & Earthquakes - new app for Android

Aftershocks

Strong mag. 6.3 earthquake - North Pacific Ocean, 98 km northeast of Hachinohe, Aomori, Japan, on Monday, 21 Dec 2020 3:23 am (GMT +10)
Please check again later while we are collecting more data.

Earlier earthquakes in the same area since 1900

Strong mag. 6.3 earthquake - North Pacific Ocean, 98 km northeast of Hachinohe, Aomori, Japan, on Monday, 21 Dec 2020 3:23 am (GMT +10)

Map of earlier quakes

Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?

Support us - Help us upgrade our server!

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.
Our server is reaching its limits and we need financing to increase capacity in order to deal with huge activity peaks when quakes occur. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every penny counts and every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features and in upgrading our software, please make a donation (PayPal or Online cc payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you! With best regards from the VolcanoDiscovery team.
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.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | About us || Français | Deutsch
Follow us: