Earthquake Physics Reflection

Briefly, “explain” the intent of this cartoon

Why do earthquakes occur?

Which of the following diagrams represents a normal fault? What is your evidence?

A.B.

TPS – What is going on here?

If you began to record a nearby large earthquake on your seismograph in Los Angeles, could you use your cell phone to call your friend in St. Louis and alert them to run to the seismograph to

watch? WHY?

Los Angeles, CA

St. Louis, MO

Epicenter

Yes. Cell phones signals are part of the electromagnetic spectrum and as a result travel much faster (at the speed of light in a vacuum) than seismic waves through the ground.

Earthquake1 degree = ~111km

Slope = ?

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IRIS is a consortium of over 100 US universities that was was founded in 1984 with support from the National Science Foundation. In partnership with its Member Institutions and the scientific community, IRIS manages

and operates comprehensive, high-quality geophysical facilities that enable exciting discoveries in seismology and the Earth sciences. IRIS

programs contribute to scholarly research, education, earthquake hazard mitigation, and the verification of a Comprehensive Test Ban Treaty.

www.iris.edu/hq/inclass