Minor mag. 0.9 earthquake - 20 Km E of Castle Rock, Washington, USA, on Tuesday, 30 March 2021 at 14:27 (GMT) -
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US| Washington | Washington | Oregon
Minor magnitude 0.9 earthquake at 17 km depth
30 Mar 17:44 UTC: First to report: USGS after 3 hours.
Date & time: 30 Mar 2021 14:27:14 UTC -
Depth: 16.5 km
Epicenter latitude / longitude: 46.249°N / 122.64333°W (Washington, United States)
Nearest volcano: Mount St. Helens (36 km / 22 mi)
Nearby towns and cities:
21 km (13 mi) E of Castle Rock (pop: 2,180) --> See nearby quakes!
23 km (15 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!
68 km (42 mi) N of Vancouver (pop: 172,900) --> See nearby quakes!
81 km (50 mi) N of Portland (Oregon) (pop: 632,300) --> See nearby quakes!
85 km (53 mi) NNE of Hillsboro (Oregon) (pop: 102,300) --> See nearby quakes!
85 km (53 mi) NNW of Gresham (Oregon) (pop: 110,600) --> See nearby quakes!
86 km (53 mi) N of Beaverton (Oregon) (pop: 96,600) --> See nearby quakes!
86 km (53 mi) N of Aloha (Oregon) (pop: 49,400) --> See nearby quakes!
90 km (56 mi) SSE of Olympia (pop: 50,300) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 106 joules (0.392 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.
|0.9||17 km||20 Km E 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 0.9, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.