Earthquake Physics Reflection

Briefly, “explain” the intent of this cartoon

Why do earthquakes occur?

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

TPS – What is going on here?

Epicenter St. Louis, MO Los Angeles, CA Yes. Cell phones signals are part of the electromagnetic spectrum and as a result travel much faster than seismic waves through the ground. Cell phones have a wavelength of about 1 foot or .305m and a frequency of 800 to 900 MHz, although newer models may use higher frequencies up to 2,200 MHz (American Cancer Society). Speed = Wavelength x Frequency Thus the speed of a cell phone signal could be estimated to be 244,000 km/s - 274,500 km/s Station CCM is 18.8 degrees or 2086 km further from the earthquake and the signal takes approximately 260 seconds longer to travel there, so you would have over 4 minutes to call. The velocity of the first arriving wave (8.2 km/sec) is a typical velocity for waves traveling in the top of the mantle. 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?

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. 1 degree = ~111km Earthquake Slope = ? Yes. Cell phones signals are part of the electromagnetic spectrum and as a result travel much faster than seismic waves through the ground. Cell phones have a wavelength of about 1 foot or .305m and a frequency of 800 to 900 MHz, although newer models may use higher frequencies up to 2,200 MHz (American Cancer Society). Speed = Wavelength x Frequency Thus the speed of a cell phone signal could be estimated to be 244,000 km/s - 274,500 km/s Station CCM is 18.8 degrees or 2086 km further from the earthquake and the signal takes approximately 260 seconds longer to travel there, so you would have over 4 minutes to call. The velocity of the first arriving wave (8.2 km/sec) is a typical velocity for waves traveling in the top of the mantle.

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