23 - Took control trees and discovered there was no other...

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01:03 Shakeout.org San Andreas Fault is approx. mostly parallel to North American Plate and Pacific  Plate Big Bend Region Mission San Juan Capistrano Chapel-fell down during an earthquake (1812) 40-50 People were killed December 8, 1812 ** about Mag 7.5 Led everyone to build the EQ occurred on a fault  See hand out (Newport- Inglewood Fault Zone) but occurred on San Andreas  Fault  Looked at trees up around the fault A tree that lost its top in 1857, from the shaking of the EQ Only at the high elevations up near Wrightwood that had high enough trees like  these  Found winter of 1812-1813, a lot of the trees suffered severe trauma 12 trees that almost died  They checked if the EQ was the cause of the trees suffering trauma
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Unformatted text preview: Took control trees and discovered there was no other cause such as beatles, lack of water, etc. Found that the major part of their root systems were along the fault, and got ripped in half by the EQ 1857-Re ruptured part of the Dec 8, 1812 EQ. Less than 45 years between those EQs *Pallet Creek –haven’t had one since 1857 there EQS don’t occur like clock work Average repeat time, is about 110 years 1812 known as the year of the EQs Dec. 21, 1812 – EQ occurred further to the west, Ventura Basin Mission San Buenaventura Dec 21, 1812 EQ, about 7.3 Magnitude….CONT next lecutre 01:03 01:03...
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This note was uploaded on 10/18/2010 for the course GEOL 240 taught by Professor Sammis during the Fall '08 term at USC.

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23 - Took control trees and discovered there was no other...

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