CompuServe Thread

Hi, William (and Doug) From Doug's reply: > I often read about trees in conjunction with reports of old quakes. I do not > recall whether they are observing a sudden rash of tree-falls in the > geological record, or abrupt transitions in tree ring sizes, or whatever. I have in hand the science section of the Oregonian published last week. The cover article is about two scientists, one in Japan, the other in Michigan, that have established the date of the last major earthquake along the Cascadia Subduction Zone. They claim the quake, a magnitude 9, occurred on Tuesday evening, Jan. 26, 1700 at 9:00 PM PST. This estimate was based on: 1) Several local, oral, NW Indian legends about a quake at night, in the winter, and subsequent 30 foot tsunami. 2) Records of 6 foot tsunamis that destroyed houses at three widely dispersed sites in Japan on Wednesday, about 10 – 12 hours later. 3) The 1700 date sits exactly in the middle of a 40 year time frame of tree ring dating and radio-carbon dating of tree stumps at two sites in SW Washington. Apparently the trees were killed by an incursion of salt water after the land subsided from 2 – 6 feet. I'll hang onto this article in case anyone wants a look. It's pretty big and would be a challenge to copy, but I'll figure something out. 🙂 Regards, Guy