Weak mag. 3.1 earthquake - North Pacific Ocean, 25 mi southwest of Fortuna, Humboldt County, California, USA, on Monday, 17 May 2021 12:09 am (GMT -7) -
Weak magnitude 3.1 earthquake at 15 km depth
17 May 07:12 UTC: First to report: USGS after 3 minutes.
Update Mon, 17 May 2021, 07:18Small magnitude 3.1 quake hits 25 miles southwest of Fortuna, California, United States after midnight
3.1 quake 17 May 12:09 am (GMT -7)
An earthquake of magnitude 3.1 occurred after midnight on Monday 17 May 2021 at 12:09 am local time near Fortuna, Humboldt County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a shallow depth of 9.5 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.1 as well.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Ferndale (pop. 1,400, 20 miles away), Rio Dell (pop. 3,400, 21 miles away), Hydesville (pop. 1,200, 24 miles away), Fortuna (pop. 12,000, 25 miles away), Eureka (pop. 27,000, 37 miles away), Bayside (pop. 17,100, 42 miles away), Arcata (pop. 17,800, 43 miles away), and McKinleyville (pop. 15,200, 47 miles away), the quake was probably not felt.
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Date & time: 17 May 2021 07:09:31 UTC -
Local time at epicenter:
Monday, 17 May 2021 12:09 am (GMT -7)
Depth: 15.3 km
Epicenter latitude / longitude: 40.30817°N / 124.4255°W
(North Pacific Ocean
, United States
Nearest volcano: Clear Lake
(206 km / 128 mi)
Nearby towns and cities:33 km (20 mi) SSW of Ferndale
(pop: 1,370) --> See nearby quakes!34 km (21 mi) SW of Rio Dell
(pop: 3,390) --> See nearby quakes!39 km (25 mi) SW of Fortuna (Humboldt County)
(pop: 12,000) --> See nearby quakes!55 km (34 mi) WNW of Redway
(pop: 1,230) --> See nearby quakes!59 km (37 mi) SSW of Eureka (Humboldt County)
(pop: 27,000) --> See nearby quakes!67 km (42 mi) SSW of Bayside (Humboldt County)
(pop: 17,100) --> See nearby quakes!69 km (43 mi) SSW of Arcata (Humboldt County)
(pop: 17,800) --> See nearby quakes!76 km (47 mi) SSW of McKinleyville (Humboldt County)
(pop: 15,200) --> See nearby quakes!175 km (109 mi) W of Redding
(pop: 91,600) --> See nearby quakes!240 km (149 mi) NW of Windsor (Sonoma County)
(pop: 27,500) --> See nearby quakes!
Primary data source: USGS
(United States Geological Survey)
Estimated released energy: 2.8 x 109
joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) 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.
|3.1||15 km||12km W of Petrolia, CA||USGS|
|3.1||15 km||OFFSHORE NORTHERN CALIFORNIA||EMSC|
User reports for this quake (2)
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90061 / Light shaking (MMI IV)
Baldwin Park / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 2-5 s : Like a rocking chair I was sleeping and it woke me up
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