Sunday, 8 January 2017

Magnitude 3.8 Earthquake beneath the southern North Sea.

The British Geological Survey recorded a Magnitude 3.8 Earthquake at a depth of 18 km about 130 km of the coat of North Yorkshire, England, slightly after 6.50 pm GMT on Tuesday 3 January 2017. There are no reports of any damage or injuries associated with this event, though it was felt in the town of Scarborough on the Yorkshire coast.

The approximate location of the 3 January 2017 North Sea Earthquake. Google Maps.

Earthquakes become more common as you travel north and west in Great Britain, with the west coast of Scotland being the most quake-prone part of the island and the northwest of Wales being more prone  to quakes than the rest of Wales or most of England.
 
The precise cause of Earthquakes in and around the UK can be hard to determine; the country is not close to any obvious single cause of such activity such as a plate margin, but is subject to tectonic pressures from several different sources, with most quakes probably being the result of the interplay between these forces.
 
Britain is being pushed to the east by the expansion of the Atlantic Ocean and to the north by the impact of Africa into Europe from the south. It is also affected by lesser areas of tectonic spreading beneath the eastern North Sea, Rhine Valley and Bay of Biscay, notably the Lower Rhine Graben, an area of tectonic expansion beneath the Rhine Valley, and the North Sea Central Graben, the Terschelling Graben and The Horn Graben, the similar areas of expansion beneath the North Sea. These areas do not generate new ocean floor or expand on the same scale as the Mid Atlantic Ridge or similar structures, but they do exert pressure on the rocks around the North Sea Basin, and can lead to Earthquakes in any of the countries surrounding the Basin.
 
 Map showing the location of the North Sea Central and Terschelling Grabens. Numbered locations are oil rigs. Abbink et al. (2001).
 
Finally the country is subject to glacial rebound; until about 10 000 years ago much of the north of the country was covered by a thick layer of glacial ice (this is believed to have been thickest on the west coast of Scotland), pushing the rocks of the British lithosphere down into the underlying mantle. This ice is now gone, and the rocks are springing (slowly) back into their original position, causing the occasional Earthquake in the process. 
 
(Top) Simplified diagram showing principle of glacial rebound. Wikipedia. (Bottom) Map showing the rate of glacial rebound in various parts of the UK. Note that some parts of England and Wales show negative values, these areas are being pushed down slightly by uplift in Scotland, as the entire landmass is quite rigid and acts a bit like a see-saw. Climate North East.
 
Witness accounts of Earthquakes can help geologists to understand these events, and the structures that cause them. If you felt this quake, or were in the area but did not (which is also useful information) then you can report it to the British Geological Survey here

See also...

http://sciencythoughts.blogspot.co.uk/2016/05/thirteen-dead-after-helicopter-crashes.htmlhttp://sciencythoughts.blogspot.co.uk/2015/12/magnitude-38-earthquake-off-west-coast.html
http://sciencythoughts.blogspot.co.uk/2014/05/magnitude-34-earthquake-off-norfolk.htmlhttp://sciencythoughts.blogspot.co.uk/2013/12/at-least-twelve-dead-as-cyclone-bodil.html
http://sciencythoughts.blogspot.co.uk/2013/03/north-sea-oil-rig-partially-evacuated.htmlhttp://sciencythoughts.blogspot.co.uk/2013/01/earthquake-off-coast-of-holland.html
Follow Sciency Thoughts on Facebook.

3 comments:

  1. Testimony Of Transformation With The Help Of Lexieloancompany@yahoo.com

    I am writing this Testimony because am really grateful for what MARTINEZ LEXIE did for me and my family when I thought there was no hope he came and make my family feel alive again by lending us loan at a very low interest rate of 2%, well I have been searching for a loan to settle my debts and bills for the past months all I met scammed and took my money total 6,500usd until I finally met a God sent Lender. I never thought that there are still genuine lenders on the internet but to my greatest surprise i got my loan form this great company without wasting much time, so if you are out there looking for a loan of any kind for business or other purposes i would advise you to email Mr MARTINEZ LEXIE via: ( Lexieloancompany@yahoo.com ) or through the Company website: http://lexieloans.bravesites.com OR text: +18168926958 and be free of internet scams. thanks… Jenny Hills Resident: CA, United State


    ReplyDelete
    Replies
    1. Perkenalkan nama sy ibu fitri. sebelumnya sy ingin berbagi cerita kpd anda semua bahwa dulunya sy orang susah alias miskin kerja cuman sebagai tukan cuci waktu itu sy sempat putus asa tapi kebetulan ada teman sy menyarankan untuk mencoba menghubungi aki mupeng dan sy langsung hubungi alhasil dia mau membantu sy untuk merubah nasib dgn jalan togel. angka yg diberikan benar benar tembus sekali lagi makasih aki atas apa yg kau berikan kepada sy dan kini sy udah bangkit lagi dan buka usaha sembakau dirumah dan suami sy buka benkel. jika anda mau bukti bukan rekayasa silahkan hubungi/sms AKI MUPENG di 085294450976 atau KLIK DISINI insya allah angka beliau di jamin tembus dan beliau akan menbantu anda selama 3x putaran berturut-turut akan memenangkan angka togel dan ingat kesempatan tidak datang 2x,trima kasih.

      Delete
  2. Testimony Of Transformation With The Help Of Lexieloancompany@yahoo.com

    I am writing this Testimony because am really grateful for what MARTINEZ LEXIE did for me and my family when I thought there was no hope he came and make my family feel alive again by lending us loan at a very low interest rate of 2%, well I have been searching for a loan to settle my debts and bills for the past months all I met scammed and took my money total 6,500usd until I finally met a God sent Lender. I never thought that there are still genuine lenders on the internet but to my greatest surprise i got my loan form this great company without wasting much time, so if you are out there looking for a loan of any kind for business or other purposes i would advise you to email Mr MARTINEZ LEXIE via: ( Lexieloancompany@yahoo.com ) or through the Company website: http://lexieloans.bravesites.com OR text: +18168926958 and be free of internet scams. thanks… Jenny Hills Resident: CA, United State


    ReplyDelete