Is it possible to create an earthquake?

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Discussion Overview

The discussion explores the hypothetical possibility of creating earthquakes through various means, including the detonation of nuclear devices along fault lines, the impact of large reservoirs from dams, and the effects of natural gas injection and fracking. Participants examine both theoretical and practical implications of these actions on seismic activity.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that detonating nuclear devices along an active fault line could potentially trigger an earthquake, but only if the tectonic plates are locked and under significant pressure.
  • Another participant notes that underground nuclear blasts have been observed to cause ground shaking similar to earthquakes, suggesting that such explosions could have seismic effects.
  • Concerns are raised about the impact of natural gas injection wells, which are alleged to cause clusters of small earthquakes, with ongoing investigations into their effects.
  • One participant mentions that building large dams and filling their reservoirs can induce earthquakes, referencing considerations related to China's Three Gorges project.
  • Changing tectonic loading, such as melting large amounts of ice and adding it to the oceans, is suggested as a theoretical way to induce earthquakes, although it would differ significantly from nuclear detonations.
  • Fracking activities have been linked to small earthquakes in the UK, leading to suspensions of operations pending investigations.

Areas of Agreement / Disagreement

Participants express a range of views on the potential to create earthquakes, with no consensus reached on the effectiveness or implications of the proposed methods. Multiple competing perspectives remain regarding the causes and triggers of seismic activity.

Contextual Notes

Some claims depend on specific geological conditions and assumptions about fault behavior, and the discussion includes references to ongoing investigations and varying scientific opinions on the relationship between human activities and seismic events.

aquitaine
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Is it possible to "create" an earthquake?

Hypothetically if you buried and detonated a dozen or a hundred nukes along an active fault line, like the San Andreas, would the release of that much energy cause a major earthquake along that faultline?
 
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aquitaine said:
Hypothetically if you buried and detonated a dozen or a hundred nukes along an active fault line, like the San Andreas, would the release of that much energy cause a major earthquake along that faultline?

Only if the plates were locked such that pressure had been building up, and your nukes managed to dislodge the lock.

Most of the time the plates slide bumpily past each other, resulting in small, frequent releases over the length of the fault. Occasionally, they get stuck and get go with a larger release which we feel as an earthquake.
Your nukes would not do much of anything unless they were in the right place at the right time and the plates were really stuck and ready to blow.
 


Several thoughts here; living 90 miles south of the Nevada test site I can assure you every time an underground blast happened the ground shook just like an earthquake.
Another thought is putting a high yield device Nuclear, Bunker buster, or several, in an active volcano would certainly cause the Earth to shake just like earthquakes that are caused when the Volcano erupts. whether or not it would cause the Volcano to erupt would be a different question. I suspect such an explosion even in a dormant Volcano, with underground vents would radiate quite a movement.
 


Uh, one proven way to create quakes is to build a big dam and fill its large reservoir. IIRC, this was a serious consideration for China's Three Gorges project. The dam itself could be built with strength to spare, inspection galleries etc etc, but the worry was that any quake along the gorges could cause a major rock-fall, damming the river and/or launching a 'tsunami' which might over-top dam & locks, wrecking infrastructure and potentially creating a 'domino' failure cascade...

Fluid injection in any fault-zone always seems to prompt a spate of small quakes. Deep-well waste disposal and 'Fracking' for gas or geothermal heat are common culprits. IIRC, exploratory 'fracking' in NW UK has temporarily halted while geologists investigate several shallow '2.x' temblors. Given that even a '2' is national news in UK, the locals are very unhappy at having their nerves rattled...
 


Changing the tectonic loading is a possible way to change stress on the faults and cause earthquakes. For example melt Gigatonnes of Ice from the polar regions and add it to the Oceans and it could theoretically cause a whole lot of Earthquakes around the worlds coastal regions.

It would be pretty indiscriminate, so nothing like your nuclear bombs.
 


Dotini said:
Natural gas injection wells are alleged to cause clusters of small earthquakes in Arkansas. The quakes have tapered off since two of the wells were shut down. The industry denies responsibility and calls for more science, so a geologist with the Arkansas Geological Survey is investigating.

"Fracking" for shale gas has been suspended at a site in the UK, after two small quakes with "similar location and mechanism".

http://utilitiessavings.co.uk/2011/06/shale-gas-drilling-suspended-after-earthquake/
 

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