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Earthquakes, increase in man-made quakes, possibility of triggering dangerous quakes?

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02-14-2015, 10:12 PM
  #1
LadyStanley
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Earthquakes, increase in man-made quakes, possibility of triggering dangerous quakes?

http://www.usgs.gov/blogs/features/u...e-earthquakes/

Quote:
The number of earthquakes has increased dramatically over the past few years within the central and eastern United States. Nearly 450 earthquakes magnitude 3.0 and larger occurred in the four years from 2010-2013, over 100 per year on average, compared with an average rate of 20 earthquakes per year observed from 1970-2000.
This increase in earthquakes prompts two important questions: Are they natural, or man-made? And what should be done in the future as we address the causes and consequences of these events to reduce associated risks? USGS scientists have been analyzing the changes in the rate of earthquakes as well as the likely causes, and they have some answers.
USGS scientists have found that at some locations the increase in seismicity coincides with the injection of wastewater in deep disposal wells. Much of this wastewater is a byproduct of oil and gas production and is routinely disposed of by injection into wells specifically designed for this purpose.



http://sanfrancisco.cbslocal.com/201...gerous-quakes/


The big/dangerous quakes may only happen once in 2500 years, but still....

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02-15-2015, 10:33 AM
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yukoner88
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There are some eyes on northern Alberta now too as some quakes have been occurring in strange areas. Fox Creek had an outbreak last year

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02-17-2015, 10:01 AM
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Chootoi
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Originally Posted by yukoner88 View Post
There are some eyes on northern Alberta now too as some quakes have been occurring in strange areas. Fox Creek had an outbreak last year
Not that it necessarily means man-made but there was a 7.1 last week in the north atlantic between Greenland and Newfoundland. You definitely don't usually hear about quakes in that area especially of that magnitude. It was the biggest in 48 years.

Didn't we have a sticky thread for (significant) earthquakes at one time?

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02-17-2015, 12:41 PM
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