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Major mag. 7.4 earthquake - Izu Islands, Japan Region on Tuesday, 6 March 1984

Major mag. 7.4 earthquake  - Izu Islands, Japan Region on Tuesday, 6 March 1984
Date & time: Tuesday, 6 March 1984 02:17 UTC
Magnitude: 7.4
Depth: 457.4 km
Epicenter latitude / longitude: 29.384°N / 138.935°E (Japan)
Nearest volcano: Nichiyo Seamount (135 km / 84 mi)
Nearby towns and cities:
705 km (438 mi) S of Tokyo (pop: 8,336,600)
Primary data source: USGS
Estimated released energy: 7.9 x 1015 joules (2206 gigawatt hours, equivalent to 1.9 x 106 tons of TNT or 118.7 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
Tue, 6 Mar 02:17 UTCM 7.4 / 457.4 kmIzu Islands, Japan RegionUSGS
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 7.4 quake: Izu Islands, Japan Region, 6 Mar 1984 02:17

More info
Recorded aftershocks, latest first (209 quakes):
  • 07 Mar 1986 09:14 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    203 km (126 mi) distance
    | USGS | Details
  • 27 Feb 1986 04:09 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    214 km (133 mi) distance
    | USGS | Details
  • 26 Feb 1986 08:01 UTC
    | M 4.8 |
    37.7 km (23.4 mi) depth
    |
    197 km (122 mi) distance
    | USGS | Details
  • 25 Feb 1986 10:39 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    212 km (132 mi) distance
    | USGS | Details
  • 25 Feb 1986 01:49 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    208 km (129 mi) distance
    | USGS | Details
  • 21 Feb 1986 08:00 UTC
    | M 4.2 |
    33 km (20.5 mi) depth
    |
    213 km (132 mi) distance
    | USGS | Details
  • 18 Feb 1986 00:57 UTC
    | M 4.2 |
    397.4 km (246.9 mi) depth
    |
    78 km (48 mi) distance
    | USGS | Details
  • 13 Feb 1986 08:45 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    210 km (131 mi) distance
    | USGS | Details
  • 11 Feb 1986 01:34 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    214 km (133 mi) distance
    | USGS | Details
  • 08 Feb 1986 23:22 UTC
    | M 4.5 |
    33 km (20.5 mi) depth
    |
    206 km (128 mi) distance
    | USGS | Details
  • 06 Feb 1986 13:00 UTC
    | M 4.9 |
    532.3 km (330.8 mi) depth
    |
    171 km (106 mi) distance
    | USGS | Details
  • 05 Feb 1986 09:32 UTC
    | M 4.8 |
    42.4 km (26.3 mi) depth
    |
    195 km (121 mi) distance
    | USGS | Details
  • 04 Feb 1986 04:56 UTC
    | M 4.8 |
    75.1 km (46.7 mi) depth
    |
    191 km (119 mi) distance
    | USGS | Details
  • 03 Feb 1986 20:47 UTC
    | M 6.5 |
    508 km (315.7 mi) depth
    |
    187 km (116 mi) distance
    | USGS | Strong mag. 6.5 earthquake - Bonin Islands, Japan Region on Monday, 3 February 1986
  • 30 Jan 1986 18:28 UTC
    | M 5.1 |
    25.7 km (16 mi) depth
    |
    208 km (129 mi) distance
    | USGS | Details
  • 29 Jan 1986 19:18 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    206 km (128 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Major mag. 7.4 earthquake - Izu Islands, Japan Region on Tuesday, 6 March 1984
 

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