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Originally posted by Jusvistn
reply to post by TDawgRex
The company I work for has quite a bit of interaction with Cargill, if anything comes down through the grapevine, I'll keep you posted.
No proprietary information of course, but the rumor mill can be quite educational
Originally posted by Glinda
it was mentioned that this shift COULD be due to the "crushing weight of Lake Erie ABOVE the salt mine/seam. Odd, almost hyperbolic wording to me atleast.
Lakes Superior and Michigan-Huron water levels are 7 and 4 inches, respectively, above their levels at this time last year. Lakes St. Clair, Erie, and Ontario are 6, 9, and 13 inches, respectively, above their levels of a year ago
Now the big question remains; how are the earthquakes related to dangerous gases. This is a theory proposed a few years back in a book by James McGuire entitled Waking the Giant: How a changing climate triggers earthquakes, tsunamis and volcanoes, where the author states that the melting ice at the poles relieves pressure on the earth’s continental plates. The slightest pressure change will cause tectonic movement resulting in earthquakes. Basically, as the atmosphere heats up, we are experiencing a rapid thawing of Arctic ice. As the ice retreats, all that weight relieves pressure on the Earth’s crust which would naturally cause it to adjust.
According to an article on NPR.org the summer of 2012 saw the most dramatic ice melt in several thousand years. It literally smashed records. Of course there is always melt in the summer time, about half the ice, but the article points out three quarters of the ice melted this past summer. The previous record for ice melt was in 2007, also within the time frame of the rapid methane increase in the atmosphere. The additional ice melt this year was the size of Texas. That’s a lot of ice and a lot of weight on the continental plates.
As the ice retreats relieving pressure on those plates, it causes the water levels to rise, which is another point of pressure on the Earth’s crust. Keep in mind that the plates underneath the oceans are more fragile than land-based plates. Taking that into consideration, you can see that it’s not going to take much extra mass to cause seismic instability. Every square mile of water that is one meter deep is nearly 6 billion pounds. Sure, the waters haven’t risen that much, but consider any additional height is going to add billions of pounds of extra mass into the oceans and the level of the water rising isn’t going to be the same throughout the globe. Some areas are going to experience more sea level rise than others. That’s more pressure on certain areas which would heighten the seismic activity.
"Although Britain and Ireland are far from any plate boundaries, much of the region is still experiencing quakes due to the removal of the weight of ice sheets that once covered the land. Occasionally this post-glacial isostatic rebound - the phenomenon of the land surface gradually returning to its pre-glacial contours - results in earthquakes of this magnitude, particularly in the northern half of the islands.