Saturday, 30 March 2019

Magnitude 1.7 Earthquake off the coast of Fliey, North Yorkshire.

The British Geological Survey recorded a Magnitude 1.7 Earthquake at a depth of about 1 km beneath the North Sea, about 4 km to the northeast of the town of Filey in North Yorkshire, England, slightly after 10.30 pm GMT on Thursday 28 March 2019. There is no danger of any damage or casualties from an event of this size, though it may have been felt locally.

The approximate location of the 28 March 2019 Filey 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. However, while quakes in southern England are less frequent, they are often larger than events in the north, as tectonic pressures tend to build up for longer periods of time between events, so that when they occur more pressure is released.
 
The precise cause of Earthquakes in 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 North Sea, Rhine Valley and Bay of Biscay. 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.
 
Due to the shallow depth, and location close to a shore, the British Geological Survey also consider that this Earthquake may have been the result of an explosion, though the Filey Lifeboat Station report being unaware of any such activity in the area.

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...
 
https://sciencythoughts.blogspot.com/2018/10/fossil-collector-injured-by-landslide.htmlhttps://sciencythoughts.blogspot.com/2018/08/rockfall-kills-nine-year-old-girl-at.html
https://sciencythoughts.blogspot.com/2017/01/magnitude-38-earthquake-beneath.htmlhttps://sciencythoughts.blogspot.com/2016/11/seven-homes-evacuated-after-sinkhole.html
https://sciencythoughts.blogspot.com/2016/06/explosion-kills-miner-at-yorkshire.htmlhttps://sciencythoughts.blogspot.com/2015/06/yorkshire-stuck-by-two-earthquakes-in.html
Follow Sciency Thoughts on Facebook.

2 comments:

  1. Hi everyone, Are you into trading or just wish to give it a try, please becareful on the platform you choose to invest on and the manager you choose to manage your account because that’s where failure starts from be wise. After reading so much comment i had to give trading tips a try, I have to come to the conclusion that binary options pays massively but the masses has refused to show us the right way to earn That’s why I have to give trading tips the accolades because they have been so helpful to traders . For a free masterclass strategy kindly contact maryshea03@gmail.com for a free masterclass strategy. She'll give you a free tutors on how you can earn and recover your losses in trading for free..

    ReplyDelete
  2. Dearest Esteems,

    We are Offering best Global Financial Service rendered to the general public with maximum satisfaction,maximum risk free. Do not miss this opportunity. Join the most trusted financial institution and secure a legitimate financial empowerment to add meaning to your life/business.

    Contact Dr. James Eric Firm via
    Email: fastloanoffer34@gmail.com
    Best Regards,
    Dr. James Eric.
    Executive Investment
    Consultant./Mediator/Facilitator

    ReplyDelete