intro objective 10/31/12 locate the epicenter and focus of an earthquake which is more powerful, an...

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Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A. hand grenade? B. stick of dynamite? C. nuclear bomb? D. meteor impact?

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Page 1: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Intro

Objective 10/31/12

Locate the epicenter and focus of an earthquake

Which is more powerful, an Earthquake, or a:A. hand grenade? B. stick of dynamite? C. nuclear bomb?D. meteor impact?

Page 2: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Page 3: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Seismograph

Seismogram

An instrument that detects seismic waves

A record of the seismic wavesShow Mt. St.

Helens Seismogram

Show Seismograph

Flipchart

Page 4: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

S-P Time Method Determines location of epicenter Uses the time it takes

the waves to travel from the epicenter to a seismograph station

Need at least THREE seismograph stations to determine location of EQ

Page 5: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Page 6: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Page 7: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement [San Francisco]

Page 8: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Richter Scale

Magnitude

Mercalli Scale

Measures magnitude of earthquake Measure of

energy released by an earthquake

Measures amount of damage from an earthquake

Page 9: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Page 10: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Page 11: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Page 12: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement [Valdivia]

Page 13: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Page 14: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Want to know where the most recent earthquakes are?

http://www.iris.edu/seismon/bigmap/index.phtml

http://quake.usgs.gov/recenteqs/Anim/canv.html

Page 15: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Earthquake Measurement

Summary: A seismograph is an instrument used to

detect and measure the strength of earthquakes. The S-P Time Method helps locate the epicenter of an earthquake, but it needs at least three seismograph stations. The Richter Scale measure the energy of an earthquake while the Mercalli Scale measures how much damage is done.

Page 16: Intro Objective 10/31/12 Locate the epicenter and focus of an earthquake Which is more powerful, an Earthquake, or a: A.hand grenade? B.stick of dynamite?

Objective 10/31/12

Outro

Locate the epicenter and focus of an earthquake

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