Very strong mag. 6.1 earthquake - Yufu-shi, 28 km west of Ōita, Oita, Japan, on Sunday, 20 April 1975 at 17:35 (GMT)

Very strong mag. 6.1 earthquake - Yufu-shi, 28 km west of Ōita, Oita, Japan, on Sunday, 20 April 1975 at 17:35 (GMT)

Very strong magnitude 6.1 earthquake at 7 km depth

Date & time: 20 Apr 1975 17:35:50 UTC
Magnitude: 6.1
Depth: 7.0 km
Epicenter latitude / longitude: 33.19°N / 131.3°E (Oita, Japan)
Nearest volcano: Yabakei (8 km / 5 mi)
Nearby towns and cities:
16 km (10 mi) SE of Tsukawaki (pop: 18,400) --> See nearby quakes!
21 km (13 mi) WSW of Beppu (pop: 125,100) --> See nearby quakes!
27 km (16 mi) NNW of Takedamachi (pop: 16,400) --> See nearby quakes!
28 km (18 mi) W of Ōita (pop: 448,900) --> See nearby quakes!
29 km (18 mi) SW of Hiji (pop: 27,900) --> See nearby quakes!
36 km (23 mi) ESE of Hita (pop: 61,500) --> See nearby quakes!
37 km (23 mi) W of Tsurusaki (pop: 77,000) --> See nearby quakes!
47 km (29 mi) SSE of Nakatsu (pop: 67,400) --> See nearby quakes!
94 km (58 mi) ESE of Fukuoka (pop: 1,392,300) --> See nearby quakes!
818 km (508 mi) WSW of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 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.
MagnitudeDepthLocationSource
6.17 kmKyushu, 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.
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Aftershocks

More info
Recorded aftershocks, latest first (3 quakes):
  • 27 Jul 1975 17:16 UTC
    | M 4.7 |
    136 km (84.5 mi) depth
    |
    20 km (13 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13739 km (8537 mi) distance
    | | Details
  • 17 Jun 1975 15:18 UTC
    | M 4.7 |
    77 km (47.8 mi) depth
    |
    58 km (36 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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