reply to post by jude11
So I'll share a couple of maps with you that I made. If you've gone over my putting it all together thread, you've already seen these.
Basically, I think that you are seeing it for what it is. People really need to 'pan out' when looking at quakes, and not only have a basic
understanding of the known tectonics at work (which plates, etc) but also what COULD be possible. One of the best tools in geology is the
past....really, the only one (IMO). The trick is to reading it right. No, I do not have any kind of degree in this, so please don't think I am an
authority on anything. I'm just someone who has 'looked' at this area for quite awhile and have a basic education in geology and a vast interest.
So anyways, the following is a 'seismic/tsunami risk map' I made by going back over the historical quakes listed for the region for the past decade.
I left off Alaska and California on this because a the time I was concentrating on my own coastline: (please keep in mind that this was my own
creation. There are a bunch of formal maps put out there by agencies. This is just a connect the dots.)
So a day or two after making the above map, it aided in my 'lightbulb' moment. It suddenly made sense to me. Basically, my theory (again a
disclaimer that I am sure I am not the first nor the last to think of this. In fact, I am quite certain that if accurate, the government is well
aware of it. How could they NOT be? I am certainly no genius) is that the Cascadian Subduction Zone does not stop in Northern California, but
continues UNDER california....all the way through and out the other side into the gulf of California, Mexico. I think that the San Andreas Fault is a
symptom. The last mega thrust quake was off the coast of Washington, around the same time that they think the San Andreas formed. I believe that it
is a stress fracture...caused by the upheaval of the land from the subducting plates beneath it. Here is another, very rough map showing where I
think it is:
The red lines indicate where the currently accepted boundaries are for the subduction zone.
Now, take this concept into careful consideration and look at the current seismic map of the states from USGS:
You have a clear line of quakes in California following the San Andreas Fault. Now...look just east of it. There is another, very clear line of
quakes that follows my above map...right down through the gulf of California. Look at the world map and you'll see they have lots of quakes further
south too...the lines goes on. Look at Nevada. More quakes clustered just east of where I think the subduction zone is. This would make sense.
I really feel that the next major, destructive mega thrust subduction quake is going to be right through the middle of california. I am not trying to
fear monger with that comment, only convey a very, very strong feeling based on history, observation, and a gut feeling. This isn't complete quack
science either. A bit of research will show that I am not alone in my thoughts...the problem though with the field of geology is that there are very
few 'professionals' willing to step outside the box. Careers are quickly ended. Also, think about it. What do you think would happen if a USGS
scientist, or the US Government came forward saying that there could be a seismic event at any time that would literally tear California in half? Say
bye-bye to the US economy.
edit on 20-7-2011 by westcoast because: (no reason given)