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Oh the humanity! Will no-one think of the poor fossils!Originally posted by malvolio View PostThere are, and the trigger for suspension of work has been set at 0.8 - hence the story. Other sites in Europe use 2.0 as the trigger - about the same as a sparrow sneezing on your window sill.
Is it worth mentioning that these tremors are deep underground and happening in a shale deposit, which isn't the most stable of rock formations anyway (else fracking wouldn't work). No, thought not...
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Well no obviously not for the people who have invested a lot into the 'fracking is bad lets all live in caves and eat grass' lifestyleOriginally posted by malvolio View PostThere are, and the trigger for suspension of work has been set at 0.8 - hence the story. Other sites in Europe use 2.0 as the trigger - about the same as a sparrow sneezing on your window sill.
Is it worth mentioning that these tremors are deep underground and happening in a shale deposit, which isn't the most stable of rock formations anyway (else fracking wouldn't work). No, thought not...Leave a comment:
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There are, and the trigger for suspension of work has been set at 0.8 - hence the story. Other sites in Europe use 2.0 as the trigger - about the same as a sparrow sneezing on your window sill.Originally posted by original PM View Post
Is it worth mentioning that these tremors are deep underground and happening in a shale deposit, which isn't the most stable of rock formations anyway (else fracking wouldn't work). No, thought not...
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interesting.How can an earthquake have a negative magnitude?
Magnitude calculations are based on a logarithmic scale, so a ten-fold drop in amplitude decreases the magnitude by 1.
If an amplitude of 20 millimetres as measured on a seismic signal corresponds to a magnitude 2 earthquake, then:
10 times less (2 millimetres) corresponds to a magnitude of 1;
100 times less (0.2 millimetres) corresponds to magnitude 0;
1000 times less (0.02 millimetres) corresponds to magnitude -1.
An earthquake of negative magnitude is a very small earthquake that is not felt by humans.Leave a comment:
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I would imagine yes - there will have been a huge amount of sensors placed - hopefully by the people doing the fracking to ensure that all the doom mongery does not actually come to pass....Originally posted by NigelJK View PostLeave a comment:
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TL;DR, but as a non-scientist isn't a reading of 0.0 below detection but some how they have 2 of those?
IIRC the fracking sensors are underground near the drilling head and no temor has been felt above ground?Leave a comment:
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Thing is if you look at that - the only one of any magnitude recently was in Wales - and not blackpool
In fact the ones in blackpool could just be caused by some sand whale taking a tulip.Leave a comment:
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Earthquakes around the British Isles in the last 100 days
19 of the last 20 earthquakes in the UK were around Blackpool
...of course, what would the scientist know, all they have is data, not preconceived speculation and Daily Wail headlines.Leave a comment:
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It's like blaming all ills on Brexit, fracking will cause tremors OK, but nothing that's an issue
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magnitude 0.8 is absolutely nothing worth reporting, hundreds of thousands of these type of micro-quakes happen every year
Approximate Richter Magnitude number Seismic energy equivalent: Amount of TNT Example event
0.5 5.6kg Large hand grenade
1.5 178kg Bomb used in WWII
2 1 metric ton Large Bomb used in WWII
2.5 5.6 metric tons Blockbuster bomb (dropped from airplanes) in WWII
3.5 178 metric tons Chernobyl accident, 1986
4 1 kiloton Small atomic bomb
5 32 kilotons Nagasaki atomic bomb
Lincolnshire earthquake (UK), 2008
5.4 150 kilotons 2008 Chino Hills earthquake (Los Angeles, United States)
5.5 178 kilotons Little Skull Mtn. earthquake (NV, USA), 1992
Alum Rock earthquake (CA, USA), 2007
6.0 1 megaton Double Spring Flat earthquake (NV, USA), 1994
6.5 5.6 megatons Caracas (Venezuela), 1967
Rhodes (Greece), 2008
Eureka Earthquake (Humboldt County CA, USA), 2010
6.7 16.2 megatons Northridge earthquake (CA, USA), 1994
6.9 26.8 megatons San Francisco Bay Area earthquake (CA, USA), 1989
7.0 32 megatons Java earthquake (Indonesia), 2009, 2010 Haiti Earthquake
7.1 50 megatons Energy released is equivalent to that of Tsar Bomba, the largest thermonuclear weapon ever tested
1944 San Juan earthquake
7.5 178 megatons Kashmir earthquake (Pakistan), 2005
Antofagasta earthquake (Chile), 2007
7.8 600 megatons Tangshan earthquake (China), 1976
North Canterbury (New Zealand) 2016
8.0 1 gigaton San Francisco earthquake (CA, USA), 1906
Queen Charlotte earthquake (BC, Canada), 1949
México City earthquake (Mexico), 1985
Gujarat earthquake (India), 2001
Chincha Alta earthquake (Peru), 2007
Sichuan earthquake (China), 2008 (initial estimate: 7.8)
1894 San Juan earthquake
8.5 5.6 gigatons Toba eruption 75,000 years ago; the largest known volcanic event.[1]
Sumatra earthquake (Indonesia), 2007
9.0 32 gigatons 2011 Sendai, Japan Earthquake and Tsunami, Lisbon Earthquake (Lisbon, Portugal), All Saints Day, 1755
9.1 67 gigatons Indian Ocean earthquake, 2004 (40 ZJ in this case)
9.2 90.7 gigatons Anchorage earthquake (AK, USA), 1964
9.5 178 gigatons Valdivia earthquake (Chile), 1960
13.0 108 megatons = 100 teratons Yucatán Peninsula impact (causing Chicxulub crater) 65 Ma ago.[2][3][4][5][6]Leave a comment:
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