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Providence · 09-20-2008, 04:38 PM

Hi Friends out there -

I have been very busy at work and have not had time to come back to the post for a while. I think you all are GREAT!

I thought I would answer some questions regarding quakes for those of us who are interested in these earth events (indeed we all are). The earth is a very exciting, living place and it has its growning pains as well. Of course with the seemingly exponential population growth on the planet over the last 100 years, I think that Mother Earth has a bad case of the Humans!

Since plate tectonics are part of our earth make up from eons ago, earthquakes will always be associated with colliding plates. These plates move and adjust, jostle for position, etc etc. I don't think earthquakes are increasing per se - but I do keep track of the earthquakes that happen "across the pond" in Japan and those areas, and of course in CA. When something big happens over there, there will be adjustments elsewhere- there is only so much room on our planet for these plates to move around, somthing has got to give somewhere. So.... do I think earthquakes are increasing? Not truly, no. But, as others have pointed out, earthquakes will increase around say one of our beautiful cascade peaks prior to an eruption (just remember 2.0-3.0 earthquakes are occurring ALL the time in the cascades - most of us just don't feel them where we are).

Also, I do think measurement methods are more sophisticated and news of earthquakes much more prevalent. Will the BIG one occur in the PNW? Yes, of course - we have evidence of past biggies all over the place - take a look at the Siletz Bay in Oregon, OR go down to the shore at extremely low tide and you will see huge tree trunks exposed... all direct evidence of earthquake-related subsidence. I find it very intriguing. If you are really interested in megathrust earthquakes and subsidence, you may want to check out a study done about 10 or f15 years ago by Blackwell, et al where they looked at core samples from along the coasts of the PNW and were able to identify evidence of megathrust earthquakes every 500 years or so.

A link I promised to Carrie1971 is here:

http://hisz.rsoe.hu/alertmap/index.php?lang=

It shows real time earhquakes (among other natural and man-made disasters) across the world.

Also, regarding polar shifts - I have not studied these too much - I do have a few rocks (Hematite, I believe) that come from a very old band of rock formation that shows at least one magnetic signature from an ancient polar shift. Have no idea how this will affect us humans, if and when this does happen. My husband also is a geologist and has studied magnetism and polarity in much more detail than I. I will talk with him and see if I can post some additional informaiton on this interesting subject.

By the way, I am not sure if anyone has posted this link to Emergency Preparedness:

http://beprepared.com/Default.asp?bhcd2=1221928380

Off subject: Can anyone tell me, where George Green is from? Does he live here in the PNW?

Best to all
Providence

09-20-2008, 04:38 PM	#33
Providence Avalon Senior Member Join Date: Sep 2008 Location: Pacific Northwest Posts: 33	Re: Pacific Northwest Ground Crew Hi Friends out there - I have been very busy at work and have not had time to come back to the post for a while. I think you all are GREAT! I thought I would answer some questions regarding quakes for those of us who are interested in these earth events (indeed we all are). The earth is a very exciting, living place and it has its growning pains as well. Of course with the seemingly exponential population growth on the planet over the last 100 years, I think that Mother Earth has a bad case of the Humans! Since plate tectonics are part of our earth make up from eons ago, earthquakes will always be associated with colliding plates. These plates move and adjust, jostle for position, etc etc. I don't think earthquakes are increasing per se - but I do keep track of the earthquakes that happen "across the pond" in Japan and those areas, and of course in CA. When something big happens over there, there will be adjustments elsewhere- there is only so much room on our planet for these plates to move around, somthing has got to give somewhere. So.... do I think earthquakes are increasing? Not truly, no. But, as others have pointed out, earthquakes will increase around say one of our beautiful cascade peaks prior to an eruption (just remember 2.0-3.0 earthquakes are occurring ALL the time in the cascades - most of us just don't feel them where we are). Also, I do think measurement methods are more sophisticated and news of earthquakes much more prevalent. Will the BIG one occur in the PNW? Yes, of course - we have evidence of past biggies all over the place - take a look at the Siletz Bay in Oregon, OR go down to the shore at extremely low tide and you will see huge tree trunks exposed... all direct evidence of earthquake-related subsidence. I find it very intriguing. If you are really interested in megathrust earthquakes and subsidence, you may want to check out a study done about 10 or f15 years ago by Blackwell, et al where they looked at core samples from along the coasts of the PNW and were able to identify evidence of megathrust earthquakes every 500 years or so. A link I promised to Carrie1971 is here: http://hisz.rsoe.hu/alertmap/index.php?lang= It shows real time earhquakes (among other natural and man-made disasters) across the world. Also, regarding polar shifts - I have not studied these too much - I do have a few rocks (Hematite, I believe) that come from a very old band of rock formation that shows at least one magnetic signature from an ancient polar shift. Have no idea how this will affect us humans, if and when this does happen. My husband also is a geologist and has studied magnetism and polarity in much more detail than I. I will talk with him and see if I can post some additional informaiton on this interesting subject. By the way, I am not sure if anyone has posted this link to Emergency Preparedness: http://beprepared.com/Default.asp?bhcd2=1221928380 Off subject: Can anyone tell me, where George Green is from? Does he live here in the PNW? Best to all Providence