Earthquake, Cannon Beach Oregon, Japan discussed on True Mysteries of the Pacific Northwest
Welcome to kiss myths and mystery cyber host Kit crump. Today I'm doing a podcast on the mega quake the Pacific northwest past and future, and there will be a special note to those of you lived in the Pacific northwest at the end of this podcast. Subduction zone earthquakes have occurred every three hundred and fifty years since six hundred BC with the most recent taking place January twenty six, seventeen o, one evidence for the earlier quakes comes from core samples taken from the ocean floor. The seventeen o one quite caused several coastal regions of Washington and Oregon to drop sixty six feet massive coastal storms during one, thousand, nine, hundred, Ninety, seven, and ninety eight washed away tons of sand revealing hundreds of stumps. The remnants of Sitka spruce forest it is through a combination of carbon dating and the county. Of Rings the date of last cascade subduction zone or C. S. Z. quake took place. The Earth's surface is made up of seven major plates in many smaller ones. The smaller plates creator quakes for Short Durations Fourteen to forty five seconds that may reach nine point five on the Richter scale. They often take place of what is called. The fault line between plays the smaller plates, March Eleven, twenty eleven Japan experience us abduction zone quick that lasted more than four minutes at nine point one on the Richter scale, it was the fourth most powerful. Earthquake. In the world sense modern record taking began in one thousand, nine, hundred shake created a Su- Nami that reached a hundred and thirty three feet and moved to six miles inland. It move Japan's main island, of Honshu, eight feet and shifted the earth on its axis between four and ten inches. This wasn't earthquake created by the shifting of the Pacific Plate finally to help put earthquakes in perspective the. Loma prieta quake that interrupted the nineteen eighty nine world series in San. Francisco California lasted fifteen seconds the Great San Francisco earthquake of nineteen. Th Six was eight point six lashes forty five seconds, but Japan's greater earthquake of twenty eleven lasted over four minutes at nine point. One of the Richter scale based on data from Oregon see geographer Patrick or run and Usgs Alaska Science Center true mysteries of the. Pacific. Northwest will now tour the predicted minute by minute impact of cascade subduction zone earthquake on the Oregon coast after three, hundred, twelve years the C. S. Z. can no longer take the strain. Now this is conjecture. So hang in there with me after three hundred, twelve years CS. Can. No longer take the strain. It ruptures at a spot fifty, five miles west of Cannon Beach Oregon, and quickly spread. So long seven hundred miles of its length from British Columbia to Mendocino California the north. American plate slips fifty seven feet to the southwest sliding over the Juan de Fuca plate. But remember we're talking about a crust more than fifty miles deep. First Movement sends a pressure wave that travels through the Earth's crust thirteen, thousand miles an hour it will reach. The West Coast in ten seconds the leading edge will hit Oregon's Kennett beach and seaside thirty seconds slater. It reaches Portland Oregon in fifty seconds it has Seattle at nine point. One is what seismologist call a full rip me cities can withstand six point eight, quake lasting forty, five seconds but the difference between a forty second and four minute earthquake is like the difference between a head on collision at four miles an hour and forty miles an hour within three minutes as. A shaking continues the coast will drop from six to twenty five feet after five minutes. The worst is over for Portland and Seattle. It will have suffered from ground liquefication billets will collapse gas buyers will kerr citywide after six minutes, people seeking high ground to avoid the soon, Nami will be impeded by debris and driving. We'll be an impossibility at eight minutes to soon nominee will be about twenty five miles offshore. It approaches like an enormous high tide but flash floods speed. The leading edge will only be inches, but will increase to forty feet is predicted that the cascade subduction zone quake would create twice the impact lice the impact of Japan's great quake of two thousand eleven keep in mind that by the time you finish listening to this podcast, there will have been earthquakes all over the world, but mostly from the smaller plates I said at the beginning of this podcast will be a special note for those of you in the Pacific. Northwest. Has said that in the event of a quake, we would lose most of our overpasses both in Washington and Oregon creating huge problems with transporting food and supplies to various cities like Corvallis, where you gene and they would not go out and repair those roads. They would instead maintain what had no overpasses. This is kid chrome. Thanks for listening..