Moderate mag. 5.5 earthquake - North Pacific Ocean, 160 mi west of Eureka, Humboldt County, California, USA, on 2020-05-17 23:02:34 -08:00 -

Moderate mag. 5.5 earthquake - North Pacific Ocean, 160 mi west of Eureka, Humboldt County, California, USA, on 2020-05-17 23:02:34 -08:00

Moderate magnitude 5.5 earthquake at 10 km depth

18 May 07:06 UTC: First to report: USGS after 4 minutes.
May 18 07:09: Magnitude recalculated from 3.6 to 5.0.
Hypocenter depth recalculated from 11.0 to 10.0 km.
Date & time: 18 May 2020 07:02:34 UTC -
Local time at epicenter: 2020-05-17 23:02:34 -08:00
Magnitude: 5.5
Depth: 10.0 km
Epicenter latitude / longitude: 40.8281°N / 127.2301°W (North Pacific Ocean, California, United States)
Nearest volcano: Escanaba Segment (22 km / 14 mi)
Nearby towns and cities:
252 km (156 mi) W of Ferndale (pop: 1,370) --> See nearby quakes!
258 km (160 mi) W of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
263 km (164 mi) W of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
265 km (165 mi) W of Arcata (Humboldt County) (pop: 17,800) --> See nearby quakes!
266 km (166 mi) W of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
399 km (248 mi) WSW of Medford (Oregon) (pop: 79,800) --> See nearby quakes!
409 km (254 mi) W of Redding (pop: 91,600) --> See nearby quakes!
469 km (291 mi) NW of Santa Rosa (pop: 175,000) --> See nearby quakes!
535 km (333 mi) NW of San Francisco (pop: 864,800) --> See nearby quakes!
602 km (374 mi) NW of San Jose (pop: 1,026,900) --> See nearby quakes!
264 km (164 mi) WSW of North West Seal Rock Island --> See nearby quakes!
497 km (309 mi) NW of Farallon s Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) More info
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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.
MagnitudeDepthLocationSource
M 5.510 km252km W of Ferndale, California (USA)USGS
M 5.510 kmOff Coast Of Northern California (USA)EMSC
M 5.310 kmOff Coast of N. California (USA)GFZ
M 5.410 kmOff Coast of N. California (USA)GeoAu

User reports for this quake (13)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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98664 (653.8 km NNE of epicenter) [Map] / not felt : Definitely not felt near Portland Oregon. Scared though we will get one since the last 3 days Nevada, BC Canada, and now this one. I'm afraid our region will soon follow. (I've never felt an earthquake) (reported through our app)
1216.9 km SE of epicenter [Map] / not felt
Sandy, People's Republic of Utah (1296.9 km E of epicenter) [Map] / not felt : Not felt. (reported through our app)
1122.9 km SE of epicenter [Map] / Weak shaking (MMI III) (reported through our app)
Napa California / Moderate shaking (MMI V) : Felt one before midnight too then this one stronger in Ferndale. Im very sensitive to quakes,some say I call em before they happen. Ferndale it made me nautious, thats how I awoke, which the nausea is very unusual, Had a couple things move & my ofc desk drawer slightly opened
Fortuna ca / Weak shaking (MMI III)
Northridge CA / Weak shaking (MMI III) : Felt laying down woke from light sleep
Eureka ca / Strong shaking (MMI VI) : Trees fell in my area
LHH / Weak shaking (MMI III)
San Mateo ca / Very weak shaking (MMI II)
Agoura Hills / not felt : Just heard a noise from the toys twice after a few minutes again but not feels shaking
Agoura Hills / Very weak shaking (MMI II) : We just here noise from the toys of the kids but not feel a movement
Agoura Hills / Very weak shaking (MMI II)
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Aftershocks of the 5.5 quake North Pacific Ocean, 160 mi west of Eureka, Humboldt County, California, USA, 2020-05-17 23:02:34 -08:00

More info
Recorded aftershocks, latest first (1 quakes):
  • 19 May 2020 07:10 UTC
    | M 4.4 |
    10 km (6.2 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

Moderate mag. 5.5 earthquake - North Pacific Ocean, 160 mi west of Eureka, Humboldt County, California, USA, on 2020-05-17 23:02:34 -08:00
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