Minor mag. 0.4 earthquake - 21 Km ESE of Castle Rock, Washington, USA, on Friday, 2 Apr 2021 6:38 pm (GMT +0) -
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Minor magnitude 0.4 earthquake at 15 km depth
2 Apr 23:58 UTC: First to report: USGS after 5 hours.
Date & time: 2 Apr 2021 18:38:43 UTC -
Local time at epicenter: Friday, 2 Apr 2021 6:38 pm (GMT +0)
Depth: 15.0 km
Epicenter latitude / longitude: 46.23367°N / 122.63667°W (Washington, United States)
Nearest volcano: Mount St. Helens (35 km / 22 mi)
Nearby towns and cities:
21 km (13 mi) ESE of Castle Rock (pop: 2,180) --> See nearby quakes!
23 km (14 mi) ENE of Kelso (Cowlitz County) (pop: 11,900) --> See nearby quakes!
26 km (16 mi) ENE of Longview (Cowlitz County) (pop: 36,800) --> See nearby quakes!
66 km (41 mi) N of Vancouver (pop: 172,900) --> See nearby quakes!
79 km (49 mi) N of Portland (Oregon) (pop: 632,300) --> See nearby quakes!
83 km (52 mi) N of Gresham (Oregon) (pop: 110,600) --> See nearby quakes!
84 km (52 mi) NNE of Hillsboro (Oregon) (pop: 102,300) --> See nearby quakes!
84 km (52 mi) N of Beaverton (Oregon) (pop: 96,600) --> See nearby quakes!
84 km (52 mi) NNE of Aloha (Oregon) (pop: 49,400) --> See nearby quakes!
92 km (57 mi) SSE of Olympia (pop: 50,300) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 105 joules (0.07 kilowatt hours) More info
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.
|0.4||15 km||21 Km ESE of Castle Rock, Washington, USA||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.At magnitude 0.4, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.