Although tremors are technically earthquakes, most people differentiate between the two ascibing surface damage to earthquakes and just a bit of jostling as tremors. There can be no doubt that if you force water into a stressed area it couild act as a lubricant...but, if the stress was building up there already, then it would have naturally resulted in a quake sooner, or later, indeed releasing the stress early could well avert a more dangerous quake later on when the stresses will have built up to a much higher level and there is no lubricant present. The UK, of course, experiences about 300 quakes per year (tremors), sometimes large enough to be considered real quakes (as defined by the public perception of what is a quake) . Tremors are not particularly damaging and, in any event, if proven to be a direct result of mining, then compensation will probably be due. All the talk about earthquakes and the dire consequences are more a product of Greenpeace, who have really working ot another agenda
Hydraulic fracturing couldn't cause seismicity once the pumps are shut down and the pressure has bled away .
Over time the proppant crushes/embeds .
Overpressured gas in a sandstone reservoir will exert a force which helps supports the overburden . When this pressure is reduced the sandstone will compress and seismicity may result as is happening with Groningen .
Wastewater disposal wells are a different matter if the operators keep pumping more in once they are full which has happened before .
Correlation does not mean causation: ''But Energy In Depth, a group that represents the petroleum companies involved in fracking, points to its own research showing that earthquake risks from fracking are low.
Spokeswoman Katie Brown told Sky News: "There is a small risk and that small risk absolutely needs to be addressed but it is very important to see it in the full context.
"When 99.7% of wells are operating without seismicity it is important to note that it is not a pervasive problem.
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