Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Our New Book
Volcano Discoveries: "One of the most eye-catching guides to the world’s volcanoes ever published.
Volcano Tours
Our expert volcanologists and photographers offer unique travel experiences: volcano expeditions, photo tours, and relaxed walking & study tours.
Guaranteed tours
8-16 May 2021: From Stromboli to Etna - Sicila and Eolian Islands (Italy)
: spaces available / : guaranteed / : few spaces left / : booked out
Interactive map of latest earthquakes and active volcanoes in the world

Strong mag. 6.3 earthquake - Near the East Coast of Honshu, Japan on Friday, 11 March 2011

Strong mag. 6.3 earthquake - Near the East Coast of Honshu, Japan on Friday, 11 March 2011
Date & time: Friday, 11 March 2011 07:29 UTC
Magnitude: 6.3
Depth: 45.4 km
Epicenter latitude / longitude: 39.031°N / 142.349°E (Japan)
Nearest volcano: Yakeishi (132 km / 82 mi)
Nearby towns and cities:
50 km (31 mi) SE of Kamaishi (pop: 43,100)
54 km (33 mi) SE of Ōtsuchi (pop: 16,500)
55 km (34 mi) E of Ōfunato (pop: 35,400)
127 km (79 mi) SE of Morioka (pop: 295,200)
154 km (96 mi) NE of Sendai (pop: 1,063,100)
440 km (273 mi) NE of Tokyo (pop: 8,336,600)
Primary data source: USGS
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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
Fri, 11 Mar 07:29 UTCM 6.3 / 45.4 kmNear 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!
to top
to top

Aftershocks of the 6.3 quake: Near the East Coast of Honshu, Japan, 11 Mar 2011 07:29

More info
Recorded aftershocks, latest first (287 quakes):
  • 02 Sep 2011 04:08 UTC
    | M 4.6 |
    47.3 km (29.4 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 25 Aug 2011 23:34 UTC
    | M 4.5 |
    76.3 km (47.4 mi) depth
    |
    43 km (27 mi) distance
    | USGS | Details
  • 21 Aug 2011 19:42 UTC
    | M 4.4 |
    61.9 km (38.5 mi) depth
    |
    33 km (21 mi) distance
    | USGS | Details
  • 20 Aug 2011 22:58 UTC
    | M 4.9 |
    62.6 km (38.9 mi) depth
    |
    59 km (37 mi) distance
    | USGS | Details
  • 19 Aug 2011 04:51 UTC
    | M 4.5 |
    40.9 km (25.4 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 10 Aug 2011 04:29 UTC
    | M 4.5 |
    58.9 km (36.6 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 09 Aug 2011 18:29 UTC
    | M 4.6 |
    67.9 km (42.2 mi) depth
    |
    31 km (19 mi) distance
    | USGS | Details
  • 09 Aug 2011 17:44 UTC
    | M 4.6 |
    52.7 km (32.7 mi) depth
    |
    53 km (33 mi) distance
    | USGS | Details
  • 08 Aug 2011 01:05 UTC
    | M 4.6 |
    51.2 km (31.8 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 02 Aug 2011 16:44 UTC
    | M 4.3 |
    50.9 km (31.6 mi) depth
    |
    39 km (24 mi) distance
    | USGS | Details
  • 01 Aug 2011 06:55 UTC
    | M 4.7 |
    49.4 km (30.7 mi) depth
    |
    48 km (30 mi) distance
    | USGS | Details
  • 31 Jul 2011 19:33 UTC
    | M 4.6 |
    49.8 km (30.9 mi) depth
    |
    28 km (17 mi) distance
    | USGS | Details
  • 31 Jul 2011 12:40 UTC
    | M 4.5 |
    56 km (34.8 mi) depth
    |
    57 km (35 mi) distance
    | USGS | Details
  • 31 Jul 2011 08:46 UTC
    | M 4.6 |
    60.4 km (37.5 mi) depth
    |
    4 km (2 mi) distance
    | USGS | Details
  • 30 Jul 2011 12:08 UTC
    | M 4.4 |
    44 km (27.3 mi) depth
    |
    48 km (30 mi) distance
    | USGS | Details
  • 28 Jul 2011 16:50 UTC
    | M 5.2 |
    47.8 km (29.7 mi) depth
    |
    22 km (14 mi) distance
    | USGS | Details
    • Show all

to top

Earlier earthquakes in the same area

Strong mag. 6.3 earthquake - Near the East Coast of Honshu, Japan on Friday, 11 March 2011
to top

More on VolcanoDiscovery

Volcanic Quakes
Earthquakes near Volcanoes: Our world-wide map continuously detects shallow earthquakes near volcanoes. These could be early signs of unrest and often precede eruptions.
Volcano Webcam images
Latest volcano webcam image: Many volcanoes can be observed in real-time using webcams. Look at the latest images collected from our volcano webcam viewer tool.
Eruption Specials
Volcano & eruption special tours: Tours dedicated to usually a single volcano currently in eruption. These trip, sometimes offered only last-minute through our newsletter, are among the most adventurous and most popular in our program.
Volcano Database
Alphabetical list of volcanoes: Find out all there is about a particular volcano
 
Why is there advertising on this site?

Support us!

Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional 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.