why some earthquakes cause more damage than others

why some earthquakes cause more damage than others?

q You will learn to explain how earthquake energy travels in seismic waves. q You will learn to distinguish among primary, secondary, and surface waves. q You will learn to describe the structure of the Earth’s interior.

focus – the point in Earth’s _____ interior _______ release occurs. Seismic where energy _______ are produced and move _____ waves outward focus from the _______.

fastest and cause rock _____ particles Travel the _______ to move back _____-and-______ forth in the ______ same wave is moving direction the ______

slower than _____ primary waves and Travel ____ right cause _____ rock particles to move at ______ waves angles to the direction of the _______

surface and cause an Form at Earth’s ____ elliptical motion with some _____-to-_____ side motion of rock particles (causes the most damage)

The fastest surface waves and moves the ground from side-toside ► Moves the ground up and down, and side-toside in the same direction that the wave is moving – kind of circular motion. Most of the shaking felt from an earthquake is due to the Rayleigh wave, which can be much larger than the other waves. ►

105 and an area on Earth, between ____ 140 degrees from the ______, focus where no ____ waves are detected – this area is known as Shadow Zone the _______ ► There’s Secondary ► ______ waves are not transmitted through ______ liquid Primary waves ► ____ slowed and are ____ deflected liquid _____ but not stopped by the _______ outer core www. saddleback. cc. ca. us/faculty/jrepka/notes/solidwaves. html

Need __ stations to locate the epicenter ____ ► Epicenter ____ is located at the intersection ► Radius = distance to epicenter ____ ►

______ inner core – iron & nickel (solid) _____ outer core – iron & nickel (liquid) mantle – largest layer made up of _______ silicon, oxygen, magnesium, and iron ______ crust –separated by Moho Discontinuity ***Seismic waves speed up and slow down due to density***

Seismographs _____ - are used to measure P-waves, S-waves, & surface waves

1. 2. 3. 4. 5. 6. ______ builds up at the points where the Stress surfaces of the fault touch. When the _______ elastic limit of the rock is seismic exceeded, it moves, producing ____ waves. There are three types of seismic waves including _____, primary ______, secondary and surface waves. _____ A _______ seismograph measures seismic waves. Three seismograph stations are needed to _______ determine the location of an epicenter. The inner core, the outer core, the lower mantle, the upper mantle, and the crust make up _______. Earth