Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 8, Problem 18E
If you wanted to live where the chances of a destructive earthquake were small, would you pick a location near a fault zone, near a mid ocean ridge, near a subduction zone, or on a volcanic island such as Hawaii? What are the relative risks of earthquakes at each of these locations?
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According to the infographic above a recent magnitude 7.7 Earthquake was recorded in Los Angeles 2016. Earthquakes represent a release of energy as a result of the earth's tectonic plates. a) Determine the amount of energy release in ergs. b) Determine the energy release in Joules. ( Hint use the earthquake formula M = 2/3 log (E/ 10^11.8); where M is the earthquake magnitude and E is the energy of the earthquake in ergs (recall 1 erg = 10^-7 Joules))
A recent magnitude 6.0 Earthquake was recorded. Earthquakes represent a release of energy as a result of the earth's tectonic plates. a) Determine the amount of energy released in ergs. b) Determine the energy release in Joules. ( Hint use the earthquake formula M = 2/3 log (E/ 10^11.8); where M is the earthquake magnitude and E is the energy of the earthquake in ergs (recall 1 erg = 10^-7 Joules)).
Chapter 8 Solutions
Astronomy
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- According to the infographic above a recent magnitude 5.4 Earthquake was recorded. Earthquakes represent a release of energy as a result of the earth's tectonic plates. a) Determine the amount of energy release in ergs. b) Determine the energy release in Joules. ( Hint use the earthquake formula M = 2/3 log (E/ 10^11.8); where M is the earthquake magnitude and E is the energy of the earthquake in ergs (recall 1 erg = 10^-7 Joules)). c) Using the earthquake magnitude scale below to qualitatively categorize (was it Minor, Light, Moderate, Strong, Major or Great) and describe the earthquake (what kind of damage is expected from a magnitude 5.4 earthquake).arrow_forwardIn the figure below, the earthquake occurred 7,100 km from the seismograph. Earthquake occurs 7,100 km away. First Pwaves arrive. First Swaves arrive. Mww 10 15 20 25 Time (minutes) How fast did the P waves travel in km/s? km/s How fast did the S waves travel (in km/s)? km/s How long (in seconds) did the P waves and the S waves take to travel 120 km from the epicenter? Assume the wave speeds are constant. P waves S waves Selsmic wave strengtharrow_forwardI want an answer of question number 48.arrow_forward
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