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Strong mag. 5.1 earthquake - 8.7 km northeast of Orkney, South Africa, on Monday, April 3, 2017 at 03:08 GMT

Strong mag. 5.1 earthquake - 8.7 km northeast of Orkney, South Africa, on Monday, April 3, 2017 at 03:08 GMT Strong mag. 5.1 earthquake - 8.7 km northeast of Orkney, South Africa, on Monday, April 3, 2017 at 03:08 GMT

Strong magnitude 5.1 earthquake at 10 km depth

3 Apr 03:20 UTC: First to report: GFZ after 12 minutes.

Earthquake details

Date & timeApr 3, 2017 03:08:52 UTC
Local time at epicenter
StatusConfirmed
Magnitude5.1
Depth10.0 km
Epicenter latitude / longitude26.93°S / 26.74°E (Dr Kenneth Kaunda District Municipality, North West, South Africa)
Antipode26.93°N / 153.26°W
Shaking intensityLight shaking
Felt37 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities9 km (5 mi) NE of Orkney (North-West) (pop: 145,800) | Show on map | Quakes nearby
10 km (6 mi) SSW of Stilfontein (North-West) (pop: 93,100) | Show on map | Quakes nearby
11 km (7 mi) SE of Klerksdorp (North-West) (pop: 178,900) | Show on map | Quakes nearby
37 km (23 mi) NW of Viljoenskroon (Orange Free State) (pop: 55,000) | Show on map | Quakes nearby
43 km (27 mi) SW of Potchefstroom (North-West) (pop: 123,700) | Show on map | Quakes nearby
52 km (33 mi) NNE of Bothaville (Orange Free State) (pop: 71,900) | Show on map | Quakes nearby
133 km (83 mi) SW of Soweto (Gauteng) (pop: 1,695,000) | Show on map | Quakes nearby
153 km (95 mi) WSW of Johannesburg (Gauteng) (pop: 2,026,500) | Show on map | Quakes nearby
161 km (100 mi) SE of Mahikeng (North-West) (pop: 14,000) | Show on map | Quakes nearby
195 km (121 mi) SW of Pretoria (Gauteng) (pop: 1,619,400) | Show on map | Quakes nearby
Estimated seismic energy released2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tons of TNT) | 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
5.110 kmSouth AfricaGFZ
5.210 km SOUTH AFRICAEMSC
5.25 km- South AfricaUSGS
shake map
(shakemap: USGS)

User reports for this quake (47)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Frankfort / Weak shaking (MMI III) : It was scary and even the curtains were moving by the earthquake.  
PLUMTREE TOWN, ZIMBABWE / Light shaking (MMI IV) : FELT SOME NOISE AND VIBRATIONS AND SHAKING OF BUILDING  
Durban south / Light shaking (MMI IV) : I was watching tv and the rocking chair I was sitting in starting shaking. At first I thought I'm imagining it, so I held the chair nd it still continued and the glass cabinet in our passage was rattling.  
Randburg, City of Johannesburg Metropolitan Municipality, Gauteng (151.7 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Rustenburg / Light shaking (MMI IV) : My bed and hanging lights shaked. Animals were quite disturbed....  
Rustenburg , Lefaragatlhe / Moderate shaking (MMI V) : as i was watching tv in my bedroom sitting on the bed. the bed literally started shaking like sumbdy was shaking it then i ran outside where then i felt the vibrations on the ground  
brakpan jhb / Weak shaking (MMI III)
Bulawayo / Moderate shaking (MMI V) : It started just a few minutes before 2000hrs  
Sannieshof north west province south africa (104.6 km W of epicenter) [Map] / Light shaking (MMI IV) : It sounded like a mibe blast  
Rosebank johanersburg / Light shaking (MMI IV)
Tweefontein, Polokwane / Very weak shaking (MMI II) : My door was shaking. Felt very light shaking by myself and 2 other neigbours also felt the light shaking. Just before 20:00 3.4.2017  
Eersterust, Pretoria, Gauteng / Moderate shaking (MMI V) : felt approx 20:00 03/04/2017  
Pretoria north, magalieskruin, 0182 / Light shaking (MMI IV) : our glass doors was rattling and kitchen ware  
Knysna (866.4 km SSW of epicenter) [Map] / Very weak shaking (MMI II)
robertsham / not felt
Pretoria / Light shaking (MMI IV)
Pretoria, City of Tshwane Metropolitan Municipality, Gauteng (196.2 km NE of epicenter) [Map] / Light shaking (MMI IV) : I was sitting in the couch I felt someone shaking my couch in the flat about 9seconds and decided to run out the flat  
johannesburg west / Moderate shaking (MMI V) : @ 19h45 RSA time, my grand father clock was shaking and my feet could feel the vibrations....brian roberts johannesburg  
Pretoria / Light shaking (MMI IV) : Felt it light aroun 19:45  
Koster, North West Province, South Africa / Light shaking (MMI IV) : The house trembled and the dogs barked. It continued for at least 4 to 5 seconds This happened about 19h45 on 3 April 2017  
Centurion, Pretoria / Very weak shaking (MMI II) : I felt the house rattle and the window panes kept rattling after the house stopped.  
Randburg / not felt
Klerksdorp / Moderate shaking (MMI V) : It woke me and the family up. I kid in Ou dorp, Klerksdorp  
mafikeng / Light shaking (MMI IV)
near Polokwane, Capricorn District Municipality, Limpopo (443.9 km NE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
farm situated between Klerksdorp and Potchefstroom / Very strong shaking (MMI VII)
port elizabeth / Very weak shaking (MMI II)
Newlands, Cape Town / Light shaking (MMI IV)
Mukula / Severe shaking (MMI VIII)
Potchefstroom / Weak shaking (MMI III)
Kempton Park (177.4 km ENE of epicenter) [Map] / Light shaking (MMI IV) : It felt similar to underground blasting in the mines (reported through our app)  
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