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Strong mag. 5.0 earthquake - Lewis County, 43 mi west of Yakima, Washington, USA, on Thursday, May 28, 1981 at 09:10 GMT

Strong mag. 5.0 earthquake - Lewis County, 43 mi west of Yakima, Washington, USA, on Thursday, May 28, 1981 at 09:10 GMT Strong mag. 5.0 earthquake - Lewis County, 43 mi west of Yakima, Washington, USA, on Thursday, May 28, 1981 at 09:10 GMT

Strong magnitude 5.0 earthquake at 2 km depth

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

Earthquake details

Date & timeMay 28, 1981 09:10:45 UTC
Local time at epicenter
StatusConfirmed
Magnitude5
Depth2.1 km
Epicenter latitude / longitude46.52533°N / 121.394°W (Lewis County, Washington, United States)
Antipode46.525°S / 58.606°E
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoGoat Rocks (5 km / 3 mi)
Nearby towns and cities23 km (14 mi) ESE of Packwood (pop: 342) | Show on map | Quakes nearby
61 km (38 mi) W of West Valley (pop: 12,700) | Show on map | Quakes nearby
68 km (43 mi) W of Yakima (pop: 93,700) | Show on map | Quakes nearby
83 km (52 mi) SW of Ellensburg (Kittitas County) (pop: 19,000) | Show on map | Quakes nearby
90 km (56 mi) SE of Graham (Pierce County) (pop: 23,500) | Show on map | Quakes nearby
94 km (59 mi) SE of Bonney Lake (Pierce County) (pop: 19,900) | Show on map | Quakes nearby
96 km (59 mi) SE of South Hill (pop: 52,400) | Show on map | Quakes nearby
97 km (60 mi) SE of Frederickson (Pierce County) (pop: 18,700) | Show on map | Quakes nearby
114 km (71 mi) SE of Tacoma (pop: 207,900) | Show on map | Quakes nearby
139 km (86 mi) NE of Vancouver (pop: 172,900) | Show on map | Quakes nearby
Estimated seismic energy released2 x 1012 joules (554 megawatt hours, equivalent to 477 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.DepthLocationSource
5.02.1 kmWashington (USA)USGS
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.
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Aftershocks

[More info]

Recorded aftershocks, latest first (11 quakes)

Date and timeMag
Depth
LocationDetails
Jul 6, 1981 13:29
41 years ago
2.0

5.2 km
Washington (USA)More
Jul 3, 1981 08:34
41 years ago
2.2

3.9 km
Washington (USA)More
Jul 2, 1981 20:58
41 years ago
2.2

3.7 km
Washington (USA)More
Jul 2, 1981 20:00
41 years ago
2.4

4.8 km
Washington (USA)More
Jul 2, 1981 12:46
41 years ago
2.2

4.1 km
Washington (USA)More
Jun 17, 1981 15:45
41 years ago
2.0

6.1 km
Washington (USA)More
Jun 7, 1981 08:36
41 years ago
2.0

4.6 km
Washington (USA)More
Jun 6, 1981 11:04
41 years ago
2.0

5.4 km
Washington (USA)More
Jun 4, 1981 04:34
41 years ago
2.0

5.2 km
Washington (USA)More
May 29, 1981 17:20
41 years ago
2.9

6.7 km
Lewis County, 42 mi W of Yakima, Washington, USAMore
May 28, 1981 09:52
41 years ago
2.4

1.2 km
Washington (USA)More

Earlier earthquakes in the same area

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