Wednesday, June 29, 2016

Oklahoma earthquakes now extend south of OK City

This is great.  I always told these guys to just extend the NE lines up and down.  Trouble is that they are afraid of 'wild catting'.  A dry hole is very expensive, so they stick with what they know.  Nobody down there knows a speck about the Precambrian, but the fracture zones are on very straight lines.

This shows the latest shallow thrust relative to the city.  It was only an m2.8 but with an intensity 4, which is quite something.  Now I have a whole new audience for my accelerometers, if any of them went with Science.  Unfortunately, they are all white-backlash fundamentalist Trump supporters.  :)

And this shows the new zone opening up.  They got rid of anybody intelligent in the OK geological survey, and the busgus is shivering in its boots over the Trump thing.  So everybody has the green light to go.  The shallow thrusts are the first things.  Then the zone will get bigger and we'll get the deep ones.  Once it is done, the M7 can zip right through the city.

ps. right after this earthquake there was a deep m3 right underneath it.  The deep earthquakes have begun.

Monday, June 27, 2016

Cottage Report

Finally getting pleasant.  We've been getting rain that has missed Toronto, so no big drought alert.  I remember the last time we had fires all over the place.  Those twin turbo water bombers are the bomb!

Now is horrendous deer fly time.  So many and so many varieties that you scarcely notice the horseflies.  Like all the bug cycles, this lasts for a week or two.  Horseflies pack a wallop, but are easy to kill on the dock.  Never be without your fly swatter at this time!  It was horrible to fish or talk to people on the dock, because Roxie the wonder dog would stand faithfully right beside me and be covered black with flies.  Made it good for me, but soon I felt sorry for her and go upstairs where I had two bug lamps going.  That would just slow them down a bit.

The water is now swimable, even for me.  :)

Thursday, June 23, 2016

Oklahoma Earthquake Summary

I do this once in a while for new people to my 'Earthquakes' g+ collection.

Up here in Canada, we have the Precambrian rock emerging, and we have studied it a lot.  It plunges to be below all the sediments of the US.  There hasn't been one speck of study for the 'basement' in the US, yet that is where the earthquakes are.  The pc isn't one huge slab of solid rock, but has a complex structure, namely long NE trending 'megathrusts'.  This is how the pc formed, by continental collisions, and now these faults are the focus for earthquakes.

At the pc level, the whole continent is under very high horizontal stress, due to plate tectonic motions, and mainly by sinking into a cold zone.  In fact, the continent is at the 'limiting' stress, and excess stress has been relieved by motion along the megathrusts.  All the Paleozoic rock above these features is fractured.

All would be calm and peaceful, if they left the rock alone.  Unfortunately, this is not the case, either naturally, or man-made.  The New Madrid zone was created by a natural seep of river water.  It took thousands of years, and ended up with 3 huge earthquakes in 1811-12.

Now they are 'emulating' the same thing in Oklahoma with injection, at a thousand times faster than New Madrid.  The current rate is 3-4 M3's a day, with one m4 once a week.  Another m5 should come in a few months.  I predict that they will stop injection with an m6 shallow thrust either at Cushing or the city.  At any time, it could all skip to an M7.

The mechanism is 'stress corrosion' of the deep quartz due to surface water injection.  They have been injecting deep salt water for years without an effect.  This water comes from fracking, either for natural gas or oil.

ps. After writing this, I saw that the Atlantic wants to outdo the New Yorker in earthquake scare stories.  This is the New Madrid, think of Oklahoma instead.