Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
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

Major mag. 7.1 earthquake - Near the South Coast of Honshu, Japan on Sunday, 9 August 2009

Major mag. 7.1 earthquake  - Near the South Coast of Honshu, Japan on Sunday, 9 August 2009
Date & time: Sunday, 9 August 2009 10:55 UTC
Magnitude: 7.1
Depth: 292.0 km
Epicenter latitude / longitude: 33.167°N / 137.944°E (Japan)
Nearest volcano: Inamba-jima (137 km / 85 mi)
Nearby towns and cities:
162 km (101 mi) S of Ōyama (pop: 21,700)
171 km (106 mi) S of Sagara (pop: 25,900)
171 km (106 mi) S of Iwata (pop: 88,500)
172 km (107 mi) S of Hamamatsu (pop: 605,100)
185 km (115 mi) SE of Toyohashi (pop: 378,400)
323 km (201 mi) SW of Tokyo (pop: 8,336,600)
Primary data source: USGS
Estimated released energy: 2.8 x 1015 joules (783 gigawatt hours, equivalent to 6.7 x 105 tons of TNT or 42.1 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
Sun, 9 Aug 10:55 UTCM 7.1 / 292 kmNear the South 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 7.1 quake: Near the South Coast of Honshu, Japan, 9 Aug 2009 10:55

More info
Recorded aftershocks, latest first (21 quakes):
  • 12 Mar 2011 13:11 UTC
    | M 4.8 |
    10 km (6.2 mi) depth
    |
    124 km (77 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14285 km (8876 mi) distance
    | | Details
  • 22 Jan 2011 02:48 UTC
    | M 4.3 |
    284.3 km (176.7 mi) depth
    |
    138 km (85 mi) distance
    | USGS | Details
  • 28 Dec 2010 07:15 UTC
    | M 4.5 |
    162.5 km (101 mi) depth
    |
    126 km (78 mi) distance
    | USGS | Details
  • 15 Dec 2010 18:40 UTC
    | M 4.4 |
    346.9 km (215.6 mi) depth
    |
    49 km (31 mi) distance
    | USGS | Details
  • 23 Nov 2010 21:40 UTC
    | M 4.5 |
    352.6 km (219.1 mi) depth
    |
    96 km (60 mi) distance
    | USGS | Details
  • 09 Nov 2010 16:18 UTC
    | M 4.3 |
    435 km (270.3 mi) depth
    |
    144 km (90 mi) distance
    | USGS | Details
  • 21 Oct 2010 04:23 UTC
    | M 4.4 |
    369.1 km (229.3 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14285 km (8876 mi) distance
    | | Details
  • 18 Aug 2010 23:33 UTC
    | M 5.3 |
    365.3 km (227 mi) depth
    |
    129 km (80 mi) distance
    | USGS | Details
  • 31 Jul 2010 03:52 UTC
    | M 4.7 |
    237.9 km (147.8 mi) depth
    |
    131 km (82 mi) distance
    | USGS | Details
  • 19 Jul 2010 16:46 UTC
    | M 4.1 |
    35 km (21.7 mi) depth
    |
    107 km (66 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14285 km (8876 mi) distance
    | | Details
  • 04 Jul 2010 01:07 UTC
    | M 4.3 |
    330.8 km (205.5 mi) depth
    |
    114 km (71 mi) distance
    | USGS | Details
  • 05 Jun 2010 16:36 UTC
    | M 4.6 |
    310.9 km (193.2 mi) depth
    |
    15 km (9 mi) distance
    | USGS | Details
  • 25 May 2010 22:38 UTC
    | M 4.5 |
    422 km (262.2 mi) depth
    |
    122 km (76 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Major mag. 7.1 earthquake - Near the South Coast of Honshu, Japan on Sunday, 9 August 2009
 

More on VolcanoDiscovery

 
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.