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Strong mag. 5.6 earthquake - 18 mi southwest of Scotia, Humboldt County, California, USA, on 2019-06-22 19:53:02 -08:00

Strong mag. 5.6 earthquake - 18 mi southwest of Scotia, Humboldt County, California, USA, on 2019-06-22 19:53:02 -08:00 Strong mag. 5.6 earthquake - 18 mi southwest of Scotia, Humboldt County, California, USA, on 2019-06-22 19:53:02 -08:00

Strong magnitude 5.6 earthquake at 9 km depth

23 Jun 03:56 UTC: First to report: USGS after 4 minutes.
Jun 23 03:57: Magnitude recalculated from 5.4 to 5.5.
Hypocenter depth recalculated from 7.0 to 9.5 km.
Jun 23 04:02: Magnitude recalculated from 5.5 to 5.6.
Hypocenter depth recalculated from 9.5 to 9.4 km.

Earthquake details

Date & timeJun 23, 2019 03:53:02 UTC
Local time at epicenter2019-06-22 19:53:02 -08:00
StatusConfirmed
Magnitude5.6
Depth9.4 km
Epicenter latitude / longitude40.2735°N / 124.30033°W (Humboldt, California, United States)
Antipode40.274°S / 55.7°E
Shaking intensityModerate shaking
Felt43 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoClear Lake (196 km / 122 mi)
Nearby towns and cities29 km (18 mi) SW of Scotia (Humboldt County) (pop: 850) | Show on map | Quakes nearby
38 km (24 mi) SSW of Fortuna (Humboldt County) (pop: 12,000) | Show on map | Quakes nearby
44 km (27 mi) WNW of Redway (pop: 1,230) | Show on map | Quakes nearby
60 km (37 mi) S of Eureka (Humboldt County) (pop: 27,000) | Show on map | Quakes nearby
66 km (41 mi) SSW of Bayside (Humboldt County) (pop: 17,100) | Show on map | Quakes nearby
68 km (43 mi) SSW of Arcata (Humboldt County) (pop: 17,800) | Show on map | Quakes nearby
77 km (48 mi) SSW of McKinleyville (Humboldt County) (pop: 15,200) | Show on map | Quakes nearby
100 km (62 mi) WSW of Hayfork (pop: 2,370) | Show on map | Quakes nearby
165 km (103 mi) WSW of Redding (pop: 91,600) | Show on map | Quakes nearby
306 km (190 mi) NW of Sacramento (pop: 490,700) | Show on map | Quakes nearby
Estimated seismic energy released1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 atomic bombs!) | about seismic energy
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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
5.69.4 km6km SSW of Petrolia, CA (USA)USGS
5.612 kmNorthern California (USA)EMSC
5.610 kmNear Coast of N. California (USA)GFZ
5.626 kmNear Coast of North California (USA)GeoAu
5.410 kmNorthern California (USA)BMKG

Seismograms

Seismic station: Columbia College, Columbia, CA, USA (CMB/BK network) | Distance from quake: 419 km / 261 mi | Show on map | Station Info
Seismic station Columbia College, Columbia, CA, 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 (72)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Gresham, Multnomah, Oregon (601.1 km NNE of epicenter) [Map] / not felt (reported through our app)
Ettersburg / Strong shaking (MMI VI) : Was making dinner and what sounded like an animal moved across the floor upstairs and then heard a loud noise and the house began swaying and shaking as if being moved from the corners of the house. Dropped the fork into boiling water and braced myself ne  
Redwood Valley, Mendocino, California (145.8 km SE of epicenter) [Map] / Weak shaking (MMI III)
Fort Bragg, ca (104.9 km SSE of epicenter) [Map] / Weak shaking (MMI III) : We were in a structure with a raised foundation/on the side of a slope/hill, much like a second floor. Moving ever so slightly, I heard/saw it more than felt it. Motion I could detect was very light. Dog knew it. I heard the house creak and saw the water   
Fort Bragg, ca (104.9 km SSE of epicenter) [Map] / Weak shaking (MMI III) : We were in a partly raised foundation/on the side of a slope/hill, kind of like a second floor. Moving ever so slightly, I heard/saw it more than felt it. Motion I could detect was very light. Dog knew it. I heard the house creak and saw the water cooler   
Fallbrook, CA 92028 / Light shaking (MMI IV) : I keep feeling very long slow waves of shaking under my feet on the floor and on my bed all throughout yesterday and today. I think we are getting a big one soon folks. Get ready california  
Leggett, Ca / Light shaking (MMI IV)
Redway / Moderate shaking (MMI V) : Reading a book when it happened, everything shook like crazy but nothing was damaged  
Willits (126.2 km SE of epicenter) [Map] / Moderate shaking (MMI V) : Although nothing was damaged, the length and rolling motion of this quake was alarming, very unlike other small quakes in this region. It reminded me of a mild version of the subduction zone quake in Olympia Washington we had with a severe rolling rather   
Tracy Ca / Very weak shaking (MMI II)
Fortuna / Moderate shaking (MMI V) : Made our 2 story house shake pretty good. Heard a crack noise a faint jolt few seconds before it started shaking the house.  
Bayside (65 km NNE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Santa Susana, Ventura, California (832 km SE of epicenter) [Map] / Very weak shaking (MMI II) : My labardor was acting strange 30 minutes or so before the incident. We love miles away and I am not even sure I felt it. My other lab when I was just a boy acted very strange as well in LA right before the Northridge quake. Now every time that dog also w (reported through our app)  
Eureka, CA north of King Salmon, 95503 (52.4 km N of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Vista point Humboldt Hill Eureka ca. / Strong shaking (MMI VI) : Rocking my car. Ithougt a friend was f'n with me.  
Heidelberg, Karlsruhe Region, Baden-Württemberg (9035 km NNE of epicenter) [Map] / Very weak shaking (MMI II)
Sacramento, California / not felt : Noticed my pool water gently oscillating while bbqing. No wind or any reason for it. Yelled at my wife to see if any earthquakes just happened... Bingo. Very interesting experience.  
Tijuana, Baja California (1080.5 km SE of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Eureka / Moderate shaking (MMI V)
San Marcos California / not felt
Fort Bragg, CA / Light shaking (MMI IV)
Brampton Ontario (3660.4 km ENE of epicenter) [Map] / Very weak shaking (MMI II) : Laying in bed in which I live in a basement apartment trying to go to bed and all of a sudden my body was shaking. At first I thought it was just me but then I remeber the last time this ever happened to me was when there was an earthquake which was unkno  
Rio Dell, CA / Moderate shaking (MMI V)
Eureka California / Moderate shaking (MMI V)
Westport, CA (81.4 km SSE of epicenter) [Map] / Moderate shaking (MMI V) : I was in a tent at a campground near the beach. It had a rolling feel to it. (reported through our app)  
Chula Vista, San Diego, California (1067.2 km SE of epicenter) [Map] / Violent shaking (MMI IX) : I shit me britches (reported through our app)  
ARCATA (67.5 km NNE of epicenter) [Map] / Strong shaking (MMI VI) : Strong shaking (reported through our app)  
Hanford ca. (606.2 km SE of epicenter) [Map] / not felt : Didn't feel a thing (reported through our app)  
Westport Beach / Moderate shaking (MMI V)
Arcata, Ca / Weak shaking (MMI III)
Eureka, Humboldt, California (56.6 km NNE of epicenter) [Map] / Light shaking (MMI IV)
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Aftershocks

[More info]

Recorded aftershocks, latest first (14 quakes)

Date and timeMag
Depth
LocationDetails
Aug 20, 2019 14:49
3 years ago
2.1

21 km
North Pacific Ocean, 24 mi SW of Fortuna, Humboldt County, California, USAMore
Aug 19, 2019 03:03
3 years ago
2.4

20 km
3.4 mi NW of Ferndale, Humboldt County, California, USAMore
Aug 10, 2019 05:29
3 years ago
2.2

20 km
North Pacific Ocean, 27 mi SW of Fortuna, Humboldt County, California, USAMore
Aug 3, 2019 00:10
3 years ago
2.4

32 km
18 mi SW of Fortuna, Humboldt County, California, USAMore
Aug 2, 2019 01:41
3 years ago
2.3

18 km
North Pacific Ocean, 17 mi SW of Ferndale, Humboldt County, California, USAMore
Jul 31, 2019 12:26
3 years ago
3.4

27 km
North Pacific Ocean, 18 mi SW of Ferndale, Humboldt County, California, USAMore
Jul 28, 2019 21:53
3 years ago
2.7

25 km
North Pacific Ocean, 29 mi SW of Fortuna, Humboldt County, California, USAMore
Jul 24, 2019 12:10
3 years ago
2.2

26 km
6.1 mi S of Fortuna, Humboldt County, California, USAMore
Jul 19, 2019 17:41
3 years ago
2.7

18 km
North Pacific Ocean, 32 mi SW of Fortuna, Humboldt County, California, USAMore
Jul 18, 2019 10:05
3 years ago - felt
3.0

20 km
North Pacific Ocean, 28 mi SW of Fortuna, Humboldt County, California, USAMore
Jul 9, 2019 11:30
3 years ago
3.0

8.8 km
18 mi SW of Scotia, Humboldt County, California, USAMore
Jul 5, 2019 17:22
3 years ago
2.3

27 km
4.2 mi SW of Scotia, Humboldt County, California, USAMore
Jul 3, 2019 00:59
3 years ago
2.4

20 km
7.1 mi SW of Fortuna, Humboldt County, California, USAMore
Jul 2, 2019 23:34
3 years ago
2.0

20 km
18 mi SW of Fortuna, Humboldt County, California, USAMore

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