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Major mag. 7.7 earthquake - Off the East Coast of Honshu, Japan, on Friday, 11 March 2011 at 06:25 (GMT)

Major mag. 7.7 earthquake  - Off the East Coast of Honshu, Japan, on Friday, 11 March 2011 at 06:25 (GMT)
Date & time: 2011-03-11 06:25:50 UTC
Magnitude: 7.7
Depth: 18.6 km
Epicenter latitude / longitude: 38.058°N / 144.59°E (Japan)
Nearby towns and cities:
509 km (316 mi) NE of Tokyo (pop: 8,336,600)
Primary data source: USGS
Estimated released energy: 2.2 x 1016 joules (6219 gigawatt hours, equivalent to 5.4 x 106 tons of TNT or 334.4 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
2011-03-11 06:25:50 UTCM 7.7 / 18.6 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 yet. If you felt it be the first to report it!

Aftershocks of the 7.7 quake Off the East Coast of Honshu, Japan, 2011-03-11 06:25 UTC

More info
Recorded aftershocks, latest first (4653 quakes):
  • 10 Mar 2013 07:27 UTC
    | M 3.8 |
    22 km (13.7 mi) depth
    |
    203 km (126 mi) distance
    | JMA | Details
  • 07 Mar 2013 10:05 UTC
    | M 3.7 |
    39 km (24.2 mi) depth
    |
    283 km (176 mi) distance
    | JMA | Details
  • 07 Mar 2013 09:17 UTC
    | M 3.7 |
    48 km (29.8 mi) depth
    |
    243 km (151 mi) distance
    | JMA | Details
  • 06 Mar 2013 11:12 UTC
    | M 4.2 |
    42 km (26.1 mi) depth
    |
    77 km (48 mi) distance
    | JMA | Details
  • 06 Mar 2013 03:05 UTC
    | M 3.8 |
    29 km (18 mi) depth
    |
    254 km (158 mi) distance
    | JMA | Details
  • 02 Mar 2013 20:58 UTC
    | M 4.0 |
    51 km (31.7 mi) depth
    |
    241 km (150 mi) distance
    | JMA | Details
  • 01 Mar 2013 19:56 UTC
    | M 3.7 |
    38 km (23.6 mi) depth
    |
    162 km (101 mi) distance
    | JMA | Details
  • 28 Feb 2013 04:44 UTC
    | M 3.7 |
    40 km (24.9 mi) depth
    |
    190 km (118 mi) distance
    | JMA | Details
  • 28 Feb 2013 02:04 UTC
    | M 3.8 |
    33 km (20.5 mi) depth
    |
    288 km (179 mi) distance
    | JMA | Details
  • 26 Feb 2013 19:38 UTC
    | M 3.8 |
    57 km (35.4 mi) depth
    |
    101 km (63 mi) distance
    | JMA | Details
  • 26 Feb 2013 19:12 UTC
    | M 3.9 |
    56 km (34.8 mi) depth
    |
    173 km (107 mi) distance
    | JMA | Details
  • 26 Feb 2013 17:31 UTC
    | M 4.7 |
    56 km (34.8 mi) depth
    |
    289 km (180 mi) distance
    | USGS | Details
  • 26 Feb 2013 13:55 UTC
    | M 3.8 |
    24 km (14.9 mi) depth
    |
    211 km (131 mi) distance
    | JMA | Details
  • 26 Feb 2013 12:46 UTC
    | M 4.6 |
    42.1 km (26.2 mi) depth
    |
    223 km (138 mi) distance
    | USGS | Details
  • 25 Feb 2013 20:12 UTC
    | M 4.0 |
    48 km (29.8 mi) depth
    |
    278 km (172 mi) distance
    | JMA | Details
  • 25 Feb 2013 19:57 UTC
    | M 3.7 |
    9 km (5.6 mi) depth
    |
    160 km (100 mi) distance
    | JMA | Details
  • Show all