Lecture 18 Assessment (1)
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School
Arizona State University *
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Course
251
Subject
Geology
Date
Apr 3, 2024
Type
Pages
3
Uploaded by ProfessorOysterMaster1078
Lecture 18 Assessment GEOS251 | Spring24 1 Name: _______________________________ Grade: ___/10 pts --------------------------------------------------------------------------------------------------------------------- This lecture assessment covers key concept presented in lecture 18. Assessment due on Thursday March 21
th
at 11am. The main goal of this assignment is to locate the epicenter of an Earthquake using the following information and the time-travel seismic wave diagram below. Task 1
: On the time-travel seismic wave diagram below, indicate in the blank boxes which curve represent the P-wave and which one represent the S-wave. [1 pt]
Lecture 18 Assessment GEOS251 | Spring24 2 Task 2
: Three seismographic stations report the following arrival travel time interval between P-
wave and S-wave for an Earthquake. •
Fort Worth near Dallas (Texas): 2 min 10 s •
Fresno (California): 1 min 30s •
Los Angeles (California): 1 min 30s Knowing this information, use the travel-time diagram above to estimate the epicenter distance from each location. Indicate the trave-time interval that you used on the diagram above and report the equivalent epicenter distance below [3 pts] •
Epicenter distance from Fort Worth: _______________ km •
Epicenter distance from Fresno: _______________ km •
Epicenter distance from Los Angeles: _______________ km Task 3
: Use the USA map on the next page to obtain the rough location of the epicenter by tracing circles with a radius obtained from the previous Task 2. Please do it at scale using the scale provided on the map below. [6 pts] è
Where is the epicenter? _________________________________________________
Lecture 18 Assessment GEOS251 | Spring24 3
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