Minor mag. 1.1 earthquake - 4 Km NNE of Onalaska, Washington (USA) on Saturday, 12 September 2020
12 Sep 04:18 UTC: First to report: USGS after 14 minutes.
Depth: 24.8 km
Epicenter latitude / longitude: 46.61083°N / 122.6845°W (Alaska, United States)
Nearest volcano: Mount St. Helens (60 km / 37 mi)
Nearby towns and cities:
5 km (3 mi) NE of Onalaska (pop: 600)
18 km (11 mi) NE of Napavine (pop: 1,800)
18 km (11 mi) NW of Mossyrock (pop: 800)
74 km (46 mi) SW of Tacoma (pop: 207,900)
114 km (71 mi) SW of Seattle (pop: 684,500)
121 km (75 mi) N of Portland (pop: 632,300)
Primary data source: USGS
Estimated released energy: 2.8 x 106 joules (0.783 kilowatt hours) [learn more]
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.
|Time||Mag. / Depth||Location||Source|
|Sat, 12 Sep 04:04 UTC||M 1.1 / 24.8 km||4 Km NNE of Onalaska, 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 1.1, this quake was too small to be felt by humans, but it was recorded instrumentally.