EOSC 114 Lecture Notes - Lecture 2: Subduction, Nootka Fault, Wave Power
15 Aug 2017
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Document Summary
The shaking earth: observations about local (pacific northwest) earthquakes) Most earthquakes seem to occur in specific areas, but there are a few single ones that don"t follow the pattern. All except 6 of those quakes were too small to be felt. The largest of the felt earthquakes were two magnitude 3. 1 (mw 3. 1: how observations are made. The challenge is to know about these materials to estimate travel times, and vice versa: global distribution of earthquakes, connecting earthquakes to plate tectonics. The earths lithosphere is composed of 9 major plates (and many minor, little plates) In this type, one of the plate is less dense than the other. Thus, one plate subducts or dives under the other at subduction zones: convergent type 2: same as type 1, plates move toward each other and collide, leading to compression. Here, neither plates is subducting or plunging, this the plates crumple up like a rug being pushed together.
