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Strong mag. 6.1 earthquake - Off East Coast of Honshu, Japan on Wednesday, 20 September 2017 - information

Strong mag. 6.1 earthquake - Off East Coast of Honshu, Japan on Wednesday, 20 September 2017

Strong mag. 6.1 earthquake  - Off East Coast of Honshu, Japan on Wednesday, 20 September 2017
20 Sep 16:44 UTC: First to report: GFZ after 8 minutes.
Sep 20 16:46: Magnitude recalculated from 6.2 to 6.1.
Date & time: Wednesday, 20 September 2017 16:37 UTC
Magnitude: 6.1
Depth: 10.0 km
Epicenter latitude / longitude: 38.01°N / 144.57°E (Japan)
Nearby towns and cities:
505 km (314 mi) NE of Tokyo (pop: 8,336,600)
Primary data source: GFZ
Estimated released energy: 8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 atomic bombs!) [learn more]
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.
TimeMag. / DepthLocationSource
Wed, 20 Sep 16:37 UTCM 6.1 / 10 kmOff East Coast of Honshu, JapanGFZ
Wed, 20 Sep 16:37 UTCM 6.2 / 9.8 kmOff East Coast of Honshu, Japan [Sea: Japan]INGV
2017-09-20 16:37:16 UTC (20 Sep 16:37:16 UTC)M 6.1 / 10 km- Off the East Coast of Honshu, JapanUSGS
Wed, 20 Sep 16:37 UTCM 6.1 / 10 kmSE of Kamaishi, JapanGeoAu
2017-09-21 00:37:15 (20 Sep 16:37:15 UTC)M 6.0 / 10 km日本本州东岸海域CEIC

shake map
(shakemap: USGS)

User reports for this quake (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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!
405.8 km WSW of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
The uk, england / not felt
Wolvega, Netherland (9151.1 km NNW of epicenter) [Map] / not felt
Tokyo Station / Weak shaking (MMI III)
574.5 km NNW of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)
yokohama (530.7 km WSW of epicenter) [Map] / Very weak shaking (MMI II) : I felt long small lateral vibration. (reported through our app)
Tokio (494.4 km WSW of epicenter) [Map] / Very weak shaking (MMI II)
389.2 km WSW of epicenter [Map] / Weak shaking (MMI III)
Mito-shi (Japan, 413 km SW of epicenter) : Au 7eme étage, une vibration modulée qui a duré une vingtaine de secondes. (reported through EMSC)

Aftershocks of the 6.1 quake: Off East Coast of Honshu, Japan, 20 Sep 2017 16:37

More info
Recorded aftershocks, latest first (2 quakes):
  • 28 Feb 2018 09:44 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    21 km (13 mi) distance
    | USGS | Details
  • 12 Nov 2017 22:24 UTC
    | M 5.9 |
    10 km (6.2 mi) depth
    38 km (24 mi) distance
    | GFZ | Details

Earlier earthquakes in the same area

Strong mag. 6.1 earthquake - Off East Coast of Honshu, Japan on Wednesday, 20 September 2017

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