Moderate mag. 4.5 earthquake - 90 km northwest of Noshiro, Akita, Japan, on Wednesday, June 22, 1983 at 00:59 GMT

Moderate magnitude 4.5 earthquake at 33 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.

Earthquake details

Date & time	Jun 22, 1983 00:59:35 UTC
Local time at epicenter
Status	Confirmed
Magnitude	4.5
Depth	33.0 km
Epicenter latitude / longitude	40.79°N / 139.296°E (Japan Sea, Japan)
Antipode	40.79°S / 40.704°W
Shaking intensity	Light shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Oshima-Ko-jima (76 km / 47 mi)
Nearby towns and cities	90 km (56 mi) NW of Noshiro (pop: 51,100) \| Show on map \| Quakes nearby 91 km (56 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) \| Show on map \| Quakes nearby 96 km (60 mi) W of Goshogawara (pop: 49,100) \| Show on map \| Quakes nearby 102 km (63 mi) WNW of Hirosaki (pop: 175,000) \| Show on map \| Quakes nearby 121 km (75 mi) W of Aomori (pop: 298,400) \| Show on map \| Quakes nearby 121 km (75 mi) WNW of Ōdate (pop: 64,500) \| Show on map \| Quakes nearby 138 km (86 mi) NNW of Akita (pop: 320,100) \| Show on map \| Quakes nearby 199 km (123 mi) NW of Morioka (pop: 295,200) \| Show on map \| Quakes nearby 305 km (189 mi) SW of Sapporo (pop: 1,883,000) \| Show on map \| Quakes nearby 568 km (353 mi) N of Tokyo (pop: 8,336,600) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	3.5 x 10¹¹ joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) \| about seismic energy

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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.	Depth	Location	Source
4.5	33 km	near the west coast of Honshu, Japan	USGS

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User reports for this quake

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