"The third and biggest tremor in a week hit a fracking site on Monday as residents reported hearing a "guttural roar".
"A tremor measuring 2.9 on the Richter scale has been felt near the UK's only active fracking site, less than two days after a previously record-breaking tremor at the facility.
"The British Geological Survey reported a large tremor related to fracking activity hit near Blackpool at 8.30am on Monday.
"The tremor comes only two days after a 2.1 scale "micro seismic event" was detected at the Cuadrilla energy site late on Saturday evening, previously the largest tremor ever recorded at the site."
Yes, OK, this is still well below the strength of tremor which will cause structural damage, but the intensities of these events is steadily increasing, and if I lived in that part of Lancashire, I would certainly be concerned.
Microearthquakes, not felt, or felt rarely. Recorded by seismographs.
Continual/several million per year
2.0 – 2.9
--Minor--
Often felt by people, but very rarely causes damage. Shaking of indoor objects can be noticeable.
Over 100,000 per year
4.0 – 4.9
--Light--
Noticeable shaking of indoor objects and rattling noises. Felt by most people in the affected area. Slightly felt outside. Generally causes none to minimal damage. Moderate to significant damage very unlikely. Some objects may fall off shelves or be knocked over.
10,000 to 15,000 per year
5.0 – 5.9
Moderate
Can cause damage of varying severity to poorly constructed buildings. At most, none to slight damage to all other buildings. Felt by everyone.
1,000 to 1,500 per year
6.0 – 6.9
--Strong--
Damage to a moderate number of well-built structures in populated areas. Earthquake-resistant structures survive with slight to moderate damage. Poorly designed structures receive moderate to severe damage. Felt in wider areas; up to hundreds of miles/kilometers from the epicenter. Strong to violent shaking in epicentral area.
100 to 150 per year
7.0 – 7.9
--Major--
Causes damage to most buildings, some to partially or completely collapse or receive severe damage. Well-designed structures are likely to receive damage. Felt across great distances with major damage mostly limited to 250 km from epicenter.
10 to 20 per year
8.0 – 8.9
--Great--
Major damage to buildings, structures likely to be destroyed. Will cause moderate to heavy damage to sturdy or earthquake-resistant buildings. Damaging in large areas. Felt in extremely large regions.
One per year
9.0 and greater
At or near total destruction – severe damage or collapse to all buildings. Heavy damage and shaking extends to distant locations. Permanent changes in ground topography.
Loads of people felt the movement up here. The local MP who is normally a bit wishy washy and does what he's told by the government, finally stated that fracking should end in Lancashire.
The original Richter scale was not logarithmic; it was related to the magnitude readings on a particular seismograph in Southern California.
Over the years, various logarithmic scales have been devised, each with their own name used by geologists, but the popular media tend to use the term "Richter" for all of them! This is why different sources can quote different so-called Richter values for the same seismic event - they are quoting different scales, measuring energy release, magnitude at the source (which may be deep underground), or magnitude at the surface above the source, etc.
With a logarithmic scale, each time the magnitude of the measurement increases by one, it means a tenfold increase in the strength of the property being measured. So an earthquake of magnitude 2 is 10 times the strength of one of magnitude 1, magnitude 3 would be 10 times the strength of magnitude 2, (ie 100 times that of magnitude 1) magnitude 4 would be 10 times the strength of magnitude 3 (and 1000 times the strength of magnitude 1)
Fracking regulations in the UK require fracking to cease for a certain time if any tremor exceeds magnitude 0.5, so this latest tremor of 2.9 was getting on for 1000 times that limit, assuming the values quoted are on one of the logarithmic scales.
With a logarithmic scale, each time the magnitude of the measurement increases by one, it means a tenfold increase in the strength of the property being measured. So an earthquake of magnitude 2 is 10 times the strength of one of magnitude 1, magnitude 3 would be 10 times the strength of magnitude 2, (ie 100 times that of magnitude 1) magnitude 4 would be 10 times the strength of magnitude 3 (and 1000 times the strength of magnitude 1)
Fracking regulations in the UK require fracking to cease for a certain time if any tremor exceeds magnitude 0.5, so this latest tremor of 2.9 was getting on for 1000 times that limit, assuming the values quoted are on one of the logarithmic scales.
So good to see people acting together and opposing those who interfere with the natural environment.
Presume your next cause celebre will be against tearing up the natural environment of the Amazon rain forest to keep the vegan revolution supplied with soya.
So good to see people acting together and opposing those who interfere with the natural environment.
Presume your next cause celebre will be against tearing up the natural environment of the Amazon rain forest to keep the vegan revolution supplied with soya.
How much of that soya is used to feed animals raised to be eaten?
Comments
"The third and biggest tremor in a week hit a fracking site on Monday as residents reported hearing a "guttural roar".
"A tremor measuring 2.9 on the Richter scale has been felt near the UK's only active fracking site, less than two days after a previously record-breaking tremor at the facility.
"The British Geological Survey reported a large tremor related to fracking activity hit near Blackpool at 8.30am on Monday.
"The tremor comes only two days after a 2.1 scale "micro seismic event" was detected at the Cuadrilla energy site late on Saturday evening, previously the largest tremor ever recorded at the site."
https://www.telegraph.co.uk/news/2019/08/26/third-biggest-tremor-week-hits-fracking-site-locals-report-hearing/Yes, OK, this is still well below the strength of tremor which will cause structural damage, but the intensities of these events is steadily increasing, and if I lived in that part of Lancashire, I would certainly be concerned.
(Sorry for repeat edits - struggling to format the table!)
1.0 – 1.9
2.0 – 2.9
Anymore hysterical Bremainesk ranting?
Just asking for others obviously.
Over the years, various logarithmic scales have been devised, each with their own name used by geologists, but the popular media tend to use the term "Richter" for all of them! This is why different sources can quote different so-called Richter values for the same seismic event - they are quoting different scales, measuring energy release, magnitude at the source (which may be deep underground), or magnitude at the surface above the source, etc.
With a logarithmic scale, each time the magnitude of the measurement increases by one, it means a tenfold increase in the strength of the property being measured.
So an earthquake of magnitude 2 is 10 times the strength of one of magnitude 1,
magnitude 3 would be 10 times the strength of magnitude 2, (ie 100 times that of magnitude 1)
magnitude 4 would be 10 times the strength of magnitude 3 (and 1000 times the strength of magnitude 1)
Fracking regulations in the UK require fracking to cease for a certain time if any tremor exceeds magnitude 0.5, so this latest tremor of 2.9 was getting on for 1000 times that limit, assuming the values quoted are on one of the logarithmic scales.
Time's up, Mr Egan. Scientific data and direct action shall see you gone.
Hoping that this report holds true. Some have campaigned long and hard about this issue.
Shit journalism and cynical governmental manipulation in the lead up to an election.
Rubbish.
...and fracking's opponents vow new direct action.