Major magnitude 8.2 earthquake - North Pacific Ocean, 135 km south of Kushiro, Hokkaido, Japan, on Thursday, September 25, 2003 at 19:50 (GMT)

Major magnitude 8.2 earthquake - North Pacific Ocean, 135 km south of Kushiro, Hokkaido, Japan, on Thursday, September 25, 2003 at 19:50 (GMT)

Major magnitude 8.2 earthquake at 27 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Sep 25, 2003 19:50:06 UTC
Magnitude: 8.2
Depth: 27.0 km
Epicenter latitude / longitude: 41.815°N / 143.91°E (North Pacific Ocean, Japan)
Antipode: 41.815°S / 36.09°W
Nearest volcano: Akan (175 km / 109 mi)
Nearby towns and cities:
135 km (84 mi) SSW of Kushiro (pop: 183,600) --> See nearby quakes!
136 km (84 mi) SSE of Obihiro (pop: 173,900) --> See nearby quakes!
140 km (87 mi) ESE of Shizunai-furukawachō (pop: 22,400) --> See nearby quakes!
143 km (89 mi) SSE of Otofuke (pop: 40,900) --> See nearby quakes!
211 km (131 mi) ESE of Tomakomai (pop: 174,800) --> See nearby quakes!
217 km (135 mi) ESE of Chitose (pop: 92,900) --> See nearby quakes!
221 km (137 mi) S of Kitami (pop: 113,100) --> See nearby quakes!
252 km (157 mi) ESE of Sapporo (pop: 1,883,000) --> See nearby quakes!
288 km (179 mi) ENE of Aomori (pop: 298,400) --> See nearby quakes!
773 km (480 mi) NNE of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1017 joules (34970 gigawatt hours, equivalent to 3 x 107 tons of TNT or 1880.6 atomic bombs!) More info
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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
8.227 kmHokkaido, 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!
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Aftershocks

More info

Recorded aftershocks, latest first (1786 quakes)

  • 27 Sep 2006 07:32 UTC
    | M 3.1 |
    185.7 km (115.4 mi) depth
    |
    379 km (235 mi) distance
    | USGS | Details
  • 27 Sep 2006 05:21 UTC
    | M 4.2 |
    10 km (6.2 mi) depth
    |
    596 km (370 mi) distance
    | USGS | Details
  • 26 Sep 2006 05:24 UTC
    | M 4.3 |
    56 km (34.8 mi) depth
    |
    403 km (251 mi) distance
    | USGS | Details
  • 24 Sep 2006 00:43 UTC
    | M 4.4 |
    463.2 km (287.8 mi) depth
    |
    704 km (437 mi) distance
    | USGS | Details
  • 23 Sep 2006 22:18 UTC
    | M 4.6 |
    66.7 km (41.4 mi) depth
    |
    207 km (129 mi) distance
    | USGS | Details
  • 23 Sep 2006 18:36 UTC
    | M 3.7 |
    57.6 km (35.8 mi) depth
    |
    165 km (103 mi) distance
    | USGS | Details
  • 23 Sep 2006 17:21 UTC
    | M 4.2 |
    247.8 km (154 mi) depth
    |
    354 km (220 mi) distance
    | USGS | Details
  • 22 Sep 2006 21:33 UTC
    | M 4.3 |
    37.2 km (23.1 mi) depth
    |
    631 km (392 mi) distance
    | USGS | Details
  • 22 Sep 2006 13:52 UTC
    | M 4.1 |
    127.4 km (79.2 mi) depth
    |
    177 km (110 mi) distance
    | USGS | Details
  • 22 Sep 2006 12:59 UTC
    | M 3.5 |
    10 km (6.2 mi) depth
    |
    149 km (93 mi) distance
    | USGS | Details
  • 21 Sep 2006 17:31 UTC
    | M 4.3 |
    15.3 km (9.5 mi) depth
    |
    636 km (395 mi) distance
    | USGS | Details
  • 20 Sep 2006 01:20 UTC
    | M 4.0 |
    137.6 km (85.5 mi) depth
    |
    215 km (133 mi) distance
    | USGS | Details
  • 18 Sep 2006 20:01 UTC
    | M 4.4 |
    213.9 km (132.9 mi) depth
    |
    374 km (233 mi) distance
    | USGS | Details
  • 18 Sep 2006 10:54 UTC
    | M 4.1 |
    35 km (21.7 mi) depth
    |
    572 km (355 mi) distance
    | USGS | Details
  • 17 Sep 2006 04:45 UTC
    | M 4.6 |
    28.3 km (17.6 mi) depth
    |
    408 km (254 mi) distance
    | USGS | Details
  • 16 Sep 2006 05:20 UTC
    | M 3.8 |
    231.9 km (144.1 mi) depth
    |
    318 km (198 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

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