Strong mag. 6.3 earthquake - North Pacific Ocean, 21 km southeast of Ofunato, Ōfunato-shi, Iwate, Japan, on Saturday, Jul 23, 2011 4:34 am (GMT +0)

Strong mag. 6.3 earthquake - North Pacific Ocean, 21 km southeast of Ofunato, Ōfunato-shi, Iwate, Japan, on Saturday, Jul 23, 2011 4:34 am (GMT +0)

Strong magnitude 6.3 earthquake at 41 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Jul 23, 2011 04:34:24 UTC
Local time at epicenter: Saturday, Jul 23, 2011 4:34 am (GMT +0)
Magnitude: 6.3
Depth: 41.0 km
Epicenter latitude / longitude: 38.898°N / 141.815°E (North Pacific Ocean, Japan)
Antipode: 38.898°S / 38.185°W
Nearest volcano: Kurikoma (89 km / 55 mi)
Nearby towns and cities:
21 km (13 mi) SSE of Ofunato (pop: 35,400) --> See nearby quakes!
42 km (26 mi) S of Kamaishi (pop: 43,100) --> See nearby quakes!
59 km (37 mi) E of Ichinoseki (pop: 63,000) --> See nearby quakes!
64 km (40 mi) ESE of Mizusawa (pop: 61,300) --> See nearby quakes!
70 km (43 mi) NE of Ishinomaki (pop: 117,200) --> See nearby quakes!
74 km (46 mi) SE of Kitakami (pop: 93,900) --> See nearby quakes!
81 km (50 mi) SE of Hanamaki (pop: 73,100) --> See nearby quakes!
83 km (52 mi) ENE of Furukawa (pop: 76,300) --> See nearby quakes!
108 km (67 mi) NE of Sendai (pop: 1,063,100) --> See nearby quakes!
403 km (251 mi) NNE of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
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!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic 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.
Mag.DepthLocationSource
6.341 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.
Volcanoes & Earthquakes - new app for Android

Aftershocks

[More info]

Recorded aftershocks, latest first (87 quakes)

Date and timeMag
Depth
LocationDetails
Jan 19, 2012 01:11
10 years ago
4.5

71 km
North Pacific Ocean, 38 km SE of Kamaishi, Iwate, JapanMore
Jan 18, 2012 19:32
10 years ago
4.7

45 km
North Pacific Ocean, 57 km E of Kamaishi, Iwate, JapanMore
Jan 18, 2012 08:55
10 years ago
4.6

60 km
North Pacific Ocean, 34 km NE of Kasakai-jima Island, JapanMore
Jan 12, 2012 05:37
10 years ago
5.2

35 km
North Pacific Ocean, 384 km NE of Tokyo, JapanMore
Jan 10, 2012 23:23
10 years ago
4.1

44 km
North Pacific Ocean, 60 km E of Kasakai-jima Island, JapanMore
Jan 8, 2012 22:13
10 years ago
4.9

62 km
Eastern Honshu, JapanMore
Jan 8, 2012 04:41
10 years ago
4.4

43 km
North Pacific Ocean, 39 km NE of Kasakai-jima Island, JapanMore
Jan 7, 2012 12:31
10 years ago
4.4

71 km
North Pacific Ocean, 27 km SE of Oki-sannō-jima Island, JapanMore
Jan 5, 2012 16:47
10 years ago
5.0

47 km
North Pacific Ocean, 58 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Dec 30, 2011 19:11
10 years ago
4.7

72 km
North Pacific Ocean, 31 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Dec 30, 2011 09:34
10 years ago
4.7

66 km
North Pacific Ocean, 29 km S of Ofunato, Ōfunato-shi, Iwate, JapanMore
Dec 27, 2011 07:33
10 years ago
4.6

46 km
North Pacific Ocean, 47 km SE of Kasakai-jima Island, JapanMore
Dec 21, 2011 02:06
10 years ago
4.7

63 km
Eastern Honshu, JapanMore
Dec 19, 2011 03:55
10 years ago
4.6

36 km
North Pacific Ocean, 47 km E of Kasakai-jima Island, JapanMore
Dec 18, 2011 06:08
10 years ago
4.8

45 km
North Pacific Ocean, 67 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Dec 17, 2011 03:21
10 years ago
4.3

44 km
North Pacific Ocean, 91 km SE of Sangan-jima Island, Iwate, JapanMore
Dec 16, 2011 05:27
10 years ago
4.8

14 km
North Pacific Ocean, 50 km E of Kasakai-jima Island, JapanMore
Dec 11, 2011 07:06
10 years ago
4.5

65 km
North Pacific Ocean, 36 km E of Kasakai-jima Island, JapanMore
Dec 10, 2011 06:08
10 years ago
4.7

55 km
North Pacific Ocean, 25 km NE of Kasakai-jima Island, JapanMore
Dec 4, 2011 19:20
10 years ago
4.6

64 km
North Pacific Ocean, 30 km SE of Oki-sannō-jima Island, JapanMore
Dec 3, 2011 04:16
10 years ago
4.6

29 km
North Pacific Ocean, 24 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Nov 28, 2011 18:53
10 years ago
4.7

64 km
North Pacific Ocean, 39 km NE of Kasakai-jima Island, JapanMore
Nov 26, 2011 01:43
10 years ago
4.8

52 km
North Pacific Ocean, 40 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Nov 22, 2011 02:35
10 years ago
4.5

47 km
North Pacific Ocean, 40 km E of Kasakai-jima Island, JapanMore
Nov 19, 2011 13:06
10 years ago
4.6

35 km
North Pacific Ocean, 29 km SE of Kamaishi, Iwate, JapanMore
Nov 17, 2011 08:34
10 years ago
5.0

61 km
North Pacific Ocean, 33 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Nov 9, 2011 16:05
10 years ago
4.4

47 km
North Pacific Ocean, 54 km E of Kasakai-jima Island, JapanMore
Nov 5, 2011 23:43
10 years ago
4.3

66 km
North Pacific Ocean, 24 km SE of Kasakai-jima Island, JapanMore
Nov 2, 2011 01:43
10 years ago
4.7

76 km
Eastern Honshu, JapanMore
Oct 30, 2011 23:08
10 years ago
4.8

31 km
North Pacific Ocean, 69 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Oct 29, 2011 06:24
10 years ago
4.9

58 km
North Pacific Ocean, 31 km SE of Kasakai-jima Island, JapanMore
Oct 28, 2011 06:59
10 years ago
4.5

35 km
North Pacific Ocean, 32 km SE of Kasakai-jima Island, JapanMore
Oct 28, 2011 02:06
10 years ago
4.5

42 km
North Pacific Ocean, 35 km S of Ofunato, Ōfunato-shi, Iwate, JapanMore
Oct 24, 2011 21:37
10 years ago
4.6

59 km
North Pacific Ocean, 30 km NE of Kasakai-jima Island, JapanMore
Oct 19, 2011 02:18
10 years ago
4.7

43 km
North Pacific Ocean, 46 km SE of Kasakai-jima Island, JapanMore
Oct 18, 2011 09:06
10 years ago
4.7

61 km
North Pacific Ocean, 44 km NE of Kasakai-jima Island, JapanMore
Oct 18, 2011 04:23
10 years ago
4.7

57 km
North Pacific Ocean, 60 km E of Kasakai-jima Island, JapanMore
Oct 8, 2011 11:45
10 years ago
4.2

49 km
North Pacific Ocean, 59 km SE of Kamaishi, Iwate, JapanMore
Oct 4, 2011 01:14
10 years ago
4.4

60 km
North Pacific Ocean, 38 km SE of Kasakai-jima Island, JapanMore
Sep 28, 2011 23:13
10 years ago
4.4

75 km
North Pacific Ocean, 40 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Sep 24, 2011 05:09
10 years ago
4.5

48 km
North Pacific Ocean, 63 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Sep 23, 2011 13:12
10 years ago
5.2

62 km
Sangan-jima, 4.6 km W of Ōtsuchi, Kamihei-gun, Iwate, JapanMore
Sep 20, 2011 20:59
10 years ago
4.9

66 km
North Pacific Ocean, 16 km NE of Kasakai-jima Island, JapanMore
Sep 18, 2011 00:55
10 years ago
4.2

37 km
North Pacific Ocean, 88 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Sep 17, 2011 15:13
10 years ago
4.8

60 km
North Pacific Ocean, 27 km SE of Kasakai-jima Island, JapanMore
Sep 16, 2011 21:42
10 years ago
4.4

35 km
North Pacific Ocean, 54 km E of Kasakai-jima Island, JapanMore
Sep 16, 2011 05:31
10 years ago
4.7

55 km
North Pacific Ocean, 38 km SE of Kasakai-jima Island, JapanMore
Sep 15, 2011 22:39
10 years ago
4.1

47 km
North Pacific Ocean, 58 km E of Kasakai-jima Island, JapanMore
Sep 13, 2011 14:14
10 years ago
4.7

61 km
North Pacific Ocean, 61 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Sep 13, 2011 01:34
10 years ago
4.6

53 km
North Pacific Ocean, 59 km SE of Kamaishi, Iwate, JapanMore
Sep 7, 2011 14:26
10 years ago
4.5

73 km
North Pacific Ocean, 57 km SE of Kasakai-jima Island, JapanMore
Sep 4, 2011 12:22
10 years ago
4.9

36 km
North Pacific Ocean, 68 km E of Kasakai-jima Island, JapanMore
Sep 2, 2011 04:48
10 years ago
4.4

39 km
Kesennuma Shi, Honshu-miyagi-ken, 29 km SW of Ofunato, JapanMore
Sep 2, 2011 04:08
10 years ago
4.6

47 km
North Pacific Ocean, 42 km SE of Kamaishi, Iwate, JapanMore
Aug 31, 2011 09:12
10 years ago
4.7

51 km
North Pacific Ocean, 13 km E of Kasakai-jima Island, JapanMore
Aug 28, 2011 01:23
10 years ago
4.1

28 km
North Pacific Ocean, 389 km NE of Tokyo, JapanMore
Aug 25, 2011 23:34
10 years ago
4.5

76 km
North Pacific Ocean, 23 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Aug 21, 2011 19:42
10 years ago
4.4

62 km
North Pacific Ocean, 34 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Aug 20, 2011 22:58
10 years ago
4.9

63 km
North Pacific Ocean, 35 km NE of Kasakai-jima Island, JapanMore
Aug 20, 2011 19:37
10 years ago
4.7

48 km
North Pacific Ocean, 30 km NE of Kasakai-jima Island, JapanMore
Aug 20, 2011 11:02
10 years ago
4.5

59 km
North Pacific Ocean, 26 km SE of Oki-sannō-jima Island, JapanMore
Aug 19, 2011 05:01
10 years ago
4.2

49 km
North Pacific Ocean, 390 km NE of Tokyo, JapanMore
Aug 19, 2011 04:51
10 years ago
4.5

41 km
North Pacific Ocean, 22 km SE of Kamaishi, Iwate, JapanMore
Aug 17, 2011 03:14
10 years ago
4.6

40 km
North Pacific Ocean, 43 km E of Kasakai-jima Island, JapanMore
Aug 17, 2011 03:05
10 years ago
5.0

42 km
North Pacific Ocean, 44 km E of Kasakai-jima Island, JapanMore
Aug 16, 2011 16:11
10 years ago
4.5

40 km
North Pacific Ocean, 58 km E of Kasakai-jima Island, JapanMore
Aug 13, 2011 08:30
10 years ago
4.8

30 km
North Pacific Ocean, 55 km E of Kasakai-jima Island, JapanMore
Aug 11, 2011 13:31
10 years ago
5.2

44 km
North Pacific Ocean, 39 km E of Kasakai-jima Island, JapanMore
Aug 10, 2011 04:29
10 years ago
4.5

59 km
North Pacific Ocean, 48 km SE of Kamaishi, Iwate, JapanMore
Aug 9, 2011 18:29
10 years ago
4.6

68 km
North Pacific Ocean, 46 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Aug 9, 2011 17:44
10 years ago
4.6

53 km
North Pacific Ocean, 41 km S of Ofunato, Ōfunato-shi, Iwate, JapanMore
Aug 8, 2011 01:05
10 years ago
4.6

51 km
North Pacific Ocean, 63 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Aug 2, 2011 16:44
10 years ago
4.3

51 km
North Pacific Ocean, 87 km SE of Kamaishi, Iwate, JapanMore
Aug 1, 2011 06:55
10 years ago
4.7

49 km
North Pacific Ocean, 50 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Jul 31, 2011 19:33
10 years ago
4.6

50 km
North Pacific Ocean, 54 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Jul 31, 2011 12:40
10 years ago
4.5

56 km
North Pacific Ocean, 38 km NE of Kasakai-jima Island, JapanMore
Jul 31, 2011 08:46
10 years ago
4.6

60 km
North Pacific Ocean, 49 km SE of Kamaishi, Iwate, JapanMore
Jul 29, 2011 23:18
10 years ago
4.5

26 km
North Pacific Ocean, 383 km NE of Tokyo, JapanMore
Jul 28, 2011 16:50
10 years ago
5.2

48 km
North Pacific Ocean, 72 km SE of Kamaishi, Iwate, JapanMore
Jul 28, 2011 14:16
10 years ago
4.2

35 km
North Pacific Ocean, 73 km E of Kamaishi, Iwate, JapanMore
Jul 26, 2011 13:36
10 years ago
4.6

58 km
North Pacific Ocean, 27 km E of Kasakai-jima Island, JapanMore
Jul 25, 2011 21:33
10 years ago
4.9

12 km
North Pacific Ocean, 70 km SE of Kamaishi, Iwate, JapanMore
Jul 25, 2011 20:39
10 years ago
4.8

69 km
North Pacific Ocean, 14 km NE of Kasakai-jima Island, JapanMore
Jul 25, 2011 11:10
10 years ago
4.8

35 km
North Pacific Ocean, 63 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Jul 25, 2011 11:04
10 years ago
5.1

35 km
North Pacific Ocean, 30 km NE of Kasakai-jima Island, JapanMore
Jul 24, 2011 15:07
10 years ago
5.1

62 km
North Pacific Ocean, 34 km SE of Ofunato, Ōfunato-shi, Iwate, JapanMore
Jul 23, 2011 23:56
10 years ago
4.4

70 km
North Pacific Ocean, 30 km E of Kasakai-jima Island, JapanMore
Show all

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
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.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic 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.