Strong mag. 5.1 earthquake - Skamania County, 17 mi northeast of Yacolt, Clark County, Washington, USA, on Sunday, September 17, 1961 at 15:55 GMT
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Strong magnitude 5.1 earthquake at 7 km depth
Earthquake details
| Date & time | Sep 17, 1961 15:55:56 UTC |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 5.1 |
| Depth | 7.0 km |
| Epicenter latitude / longitude | 46.023°N / 122.122°W  (Skamania, Washington, United States) |
| Antipode | 46.023°S / 57.878°E |
| Shaking intensity | Strong shaking near epicenter |
| Felt | 0 reports |
| Primary data source | USGS (United States Geological Survey) |
| Nearest volcano | Marble Mountain (10 km / 6 mi) |
| Nearby towns and cities | 28 km (17 mi) ENE of Amboy (pop: 1,610) | Show on map | Quakes nearby 42 km (26 mi) NE of Battle Ground (Clark County) (pop: 19,400) | Show on map | Quakes nearby 53 km (33 mi) NNE of La Camas (pop: 21,800) | Show on map | Quakes nearby 60 km (37 mi) NE of Vancouver (pop: 172,900) | Show on map | Quakes nearby 63 km (39 mi) NNE of Eugene (Oregon) (pop: 110,600) | Show on map | Quakes nearby 64 km (40 mi) E of Longview (Cowlitz County) (pop: 36,800) | Show on map | Quakes nearby 70 km (44 mi) NE of Portland (Oregon) (pop: 632,300) | Show on map | Quakes nearby 80 km (50 mi) NE of Beaverton (Oregon) (pop: 96,600) | Show on map | Quakes nearby 128 km (79 mi) SSE of Olympia (pop: 50,300) | Show on map | Quakes nearby 177 km (110 mi) S of Seattle (pop: 684,500) | Show on map | Quakes nearby |
| Estimated seismic energy released | 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tons of TNT) | about seismic energy |
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 |
| 5.1 | 7 km | Washington (USA) | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Aftershocks
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Recorded aftershocks, latest first (0 quake)
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