Very strong mag. 6.8 earthquake - Cutts Island, 0.7 mi west of Steilacoom, Pierce County, Washington, USA, on Wednesday, April 13, 1949 at 19:55 GMT
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Very strong magnitude 6.8 earthquake at 70 km depth
Earthquake details
Date & time | Apr 13, 1949 19:55:42 UTC |
Local time at epicenter | |
Status | Confirmed |
Magnitude | 6.8 |
Depth | 70.0 km |
Epicenter latitude / longitude | 47.167°N / 122.617°W ![]() |
Antipode | 47.167°S / 57.383°E |
Shaking intensity | Strong shaking near epicenter |
Felt | 0 reports |
Primary data source | USGS (United States Geological Survey) |
Nearest volcano | Mount Rainier (74 km / 46 mi) |
Nearby towns and cities | 1 km (1 mi) WSW of Steilacoom (Pierce County) (pop: 6,210) | Show on map | Quakes nearby 7 km (5 mi) W of Lakewood (pop: 59,800) | Show on map | Quakes nearby 9 km (6 mi) SSW of University Place (Pierce County) (pop: 32,800) | Show on map | Quakes nearby 14 km (9 mi) W of Parkland (pop: 35,800) | Show on map | Quakes nearby 16 km (10 mi) SW of Tacoma (pop: 207,900) | Show on map | Quakes nearby 26 km (16 mi) NE of Olympia (pop: 50,300) | Show on map | Quakes nearby 29 km (18 mi) SW of Federal Way (pop: 95,200) | Show on map | Quakes nearby 37 km (23 mi) SW of Kent (pop: 127,000) | Show on map | Quakes nearby 53 km (33 mi) SSW of Seattle (pop: 684,500) | Show on map | Quakes nearby 183 km (114 mi) N of Portland (Oregon) (pop: 632,300) | Show on map | Quakes nearby |
Estimated seismic energy released | 1 x 1015 joules (278 gigawatt hours, equivalent to 2.4 x 105 tons of TNT or 14.9 atomic bombs!) | 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 |
6.8 | 70 km | Seattle-Tacoma urban area, 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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