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Moderate mag. 5.0 earthquake - North Pacific Ocean, 55 mi west of Eureka, Humboldt County, California, USA, on Saturday, July 29, 2017 at 00:02 GMT

Moderate mag. 5.0 earthquake - North Pacific Ocean, 55 mi west of Eureka, Humboldt County, California, USA, on Saturday, July 29, 2017 at 00:02 GMT Moderate mag. 5.0 earthquake - North Pacific Ocean, 55 mi west of Eureka, Humboldt County, California, USA, on Saturday, July 29, 2017 at 00:02 GMT

Moderate magnitude 5.0 earthquake at 30 km depth

29 Jul 00:07 UTC: First to report: EMSC after 5 minutes.
Jul 29 00:08: Magnitude recalculated from 4.9 to 5.1.
Jul 29 00:09: Magnitude recalculated from 5.1 to 4.9.
Jul 29 00:11: Magnitude recalculated from 4.9 to 4.7.
Hypocenter depth recalculated from 4.0 to 10.0 km.
Jul 29 00:12: Magnitude recalculated from 4.7 to 4.9.
Hypocenter depth recalculated from 10.0 to 20.0 km.
Jul 29 00:26: Magnitude recalculated from 4.9 to 5.0.
Hypocenter depth recalculated from 20.0 to 30.0 km.

Earthquake details

Date & timeJul 29, 2017 00:02:43 UTC
Local time at epicenter
StatusConfirmed
Magnitude5
Depth30.0 km
Epicenter latitude / longitude40.84°N / 125.21°W (North Pacific Ocean, United States)
Antipode40.84°S / 54.79°E
Shaking intensityWeak shaking
Felt2 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearest volcanoEscanaba Segment (194 km / 121 mi)
Nearby towns and cities84 km (52 mi) WNW of Indianola (pop: 823) | Show on map | Quakes nearby
88 km (55 mi) W of Eureka (Humboldt County) (pop: 27,000) | Show on map | Quakes nearby
93 km (58 mi) WNW of Fortuna (Humboldt County) (pop: 12,000) | Show on map | Quakes nearby
94 km (58 mi) W of McKinleyville (Humboldt County) (pop: 15,200) | Show on map | Quakes nearby
95 km (59 mi) W of Arcata (Humboldt County) (pop: 17,800) | Show on map | Quakes nearby
96 km (60 mi) WSW of Westhaven-Moonstone (pop: 1,210) | Show on map | Quakes nearby
96 km (60 mi) W of Bayside (Humboldt County) (pop: 17,100) | Show on map | Quakes nearby
237 km (147 mi) SW of Grants Pass (Josephine County) (pop: 37,100) | Show on map | Quakes nearby
255 km (158 mi) SW of Medford (pop: 79,800) | Show on map | Quakes nearby
256 km (159 mi) SW of Central Point (pop: 18,000) | Show on map | Quakes nearby
Estimated seismic energy released2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) | about seismic energy
Show interactive Map
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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.
Mag.DepthLocationSource
5.030 km OFFSHORE NORTHERN CALIFORNIAEMSC
5.127 km- 74km WNW of Ferndale, CaliforniaUSGS
4.710 kmNear Coast of N. CaliforniaGFZ
shake map
(shakemap: USGS)

Seismograms

Seismic station: Corvallis, Oregon, USA (COR/IU network) | Distance from quake: 445 km / 276 mi | Show on map | Station Info
Seismic station Corvallis, Oregon, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Humboldt Hill, California (84.9 km E of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Longbeach, wa (630.6 km N of epicenter) [Map] / not felt : Didn't feel  
Longbeach, wa (624.1 km N of epicenter) [Map] / not felt : Did not feel anything up here. Waiting for the big one!!!!  
Mckinleyville / Weak shaking (MMI III)

Aftershocks

[More info]

Recorded aftershocks, latest first (0 quake)

So far, no aftershocks have been registered.

Earlier earthquakes in the same area

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