reply to post by westcoast
Very nicely put together. S & F and all that.
What if the Cascadian Subduction Zone doesn't end where they think it does?
Um, of course it does not end - it goes right the way down past the end of South America ultimately! All one long continuous 'subduction' zone - if
they are right that these are subduction zones rather than spheroidal fracture zones that are not actually subducting. Spheroidal fracturing does not
eliminate fault sticking by the way. Take a look at the whole of the Pacific area and tell me how it can move in so many different directions at one
without a mid-pacific ridge like in the Atlantic? I commented some time ago about the line of volcanoes in Cali that is spaced just right for the
presumed distance for volcanoes from the 'subduction' boundary. A line just like the one running down Chile.
Then take a look at the latest offering from Robert Smith on the Yellowstone plume and shake your head at how they can be so positive about something
one minute and then change it all the next.
One minute it goes down at 60 degrees (ish) and the next 40 degrees?
The fact of the matter is that the scientists know nothing and the description of them as "Men in white coats guessing" is I am afraid very apt much
of the time.
Put your whitecoat on westcoast - you can do just as good a job as them. (Which is not saying you are guessing any more than they are, or perhaps I
should say we can all guess as well as they can!)
I was asking myself what you would look for if trying to trace a plume. Well hot Springs of course.
Not necessarily. There are many sources of hot springs and many will not be a source from a plume. Bear in mind the hot springs in Arkansas for
example. No plume, and very likely not even a volcanic source. That does not detract from the premise, just noting.
we need to study the quakes prior to the 9.1 in Japan and see if there were any very shallow quakes there
Tons - and who says it is an unknown fault? If you looks at the latest fault mapping in Google earth then this bunch of quakes falls right at the end
of a marked fault zone and straddles the area to another which pretty much says to me that even if they did not twig this it is not new.
In the last 2 years there have been 530 recorded quakes in the area bounded by Lat 37 to lat 39 and Lon -120 to Lon -118.
It is a demonstrable fact that something changed around 5pm UTC on the 14th April this year. The steady trend of deeper quakes was suddenly and
The maroon colour is the depths and the blue is the magnitudes.
What could cause such a sudden change? The conspiracy theorist in me says nuclear test hoping to be covered up by the Japan radiation.
I will put up this set of graphs which is part of a study I am doing of earthquakes numbers in the 2 year period 01 Apr 2009 to 31 Mar 2011. Nevada
happens to be in this 'set' which is the western side of the USA.
You can get an explanation of the graphs here
this also currently shows USA Central as well.
Imagine if the Cascadian Subduction zone actually extended that far (possibly further)? If there were a major 'unzipping' the displacement of
magma could be significant. If that were to happen, what would the impact be on the calderas? I had already expected that the cascade volcanos would
be triggered in a mega thrust quake (most of them last had a major eruption 300 yrs ago, same as the last mega thrust quake)....but would the calderas
in Oregon, California and Wyoming also be impacted?
Oh Ya. In a worst case scenario they will all go boom!
edit on 18/4/2011 by PuterMan because: To add data attribution