Virtual EQ Lab Answer Sheet
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University of Maryland *
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Course
BMGT350
Subject
Astronomy
Date
Dec 6, 2023
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docx
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Name ____________________________________________________ Period __________
Virtual Earthquake Lab: Answer Sheet
Introduction:
The virtual earthquake simulation will show you the recordings of an earthquake’s seismic
waves detected by instruments far away from the earthquake. The instrument recording the seismic
waves is called a
seismograph
and the recorded wave is a
seismogram.
The point of origin of an
earthquake is called its
focus
and the point on earth’s surface directly above the focus is the
epicenter
.
Objectives
:
To locate the epicenter of an earthquake by making simple measurements on three
seismograms and
to determine the Richter Magnitude of the quake from the recordings that will be
presented to you by the
Virtual Earthquake
program.
Define the following term from the introduction above:
seismograph-
seismogram-
focus-
epicenter-
Follow the
Virtual Earthquake Directions Handout
to answer the following questions.
Use the seismogram on page 1 of the virtual earthquake program to answer these questions:
a.
What is the unit of measure on the vertical axis? _______________________________
b.
What is the unit of measure on the horizontal axis?_____________________________
c.
_________________________________________ is the time of the S-P interval?
d.
_________________________________ is the amplitude or Maximum S wave?
Continue reading through the pages to answer the data table below..
Name of station
(written under the seismogram on
page 3)
S-P Interval (s)
(Page 3)
Epicenter Distance (km)
(page 4)
Max S wave (mm)
(page 9)
What is the magnitude of your earthquake? __________________________________________
List the 3 steps to locating the epicenter of the earthquake:
1.
2.
3.
Follow directions handout to send your certificate your teacher.
Choose “Execute Earthquake.” At the bottom of page 1 choose “2. Southern California.”
Complete this simulation on the computer, sending your completed certificate to your teacher.
Repeat for 3. Japan region and 4. Mexico.
*You do not have to write the data for 2,3,4 on paper.
Virtual Earthquake Lab: Directions Handout
Go to
http://www.sciencecourseware.com/VirtualEarthquake/VQuakeExecute.html
Read through the information on earthquakes and how to read a seismogram. Define words on your answer sheet.
At the bottom of page 1 choose “San Francisco area” and click on
the Submit Choice box.
Read the information on page 2.
Using the three seismograms, determine the answers and fill them into the
Data Table
on your answer sheet.
1.
There are three cities listed below the seismogram. Make sure to record the name of the city, state in each
blank on the data table.
2.
Determine the S-P interval for each station. You will need to be accurate here! Record your answer in the
box on the computer and your answer on your answer sheet in the data table.
3.
Continue on to “Convert S-P Intervals” at the bottom of the page 3 and read the information.
4.
Fill in the Epicenter Distance for each station.
To do this, go up the vertical axis to the time you determined,
move over to the standard line and move down to read what the horizontal measurement is.
Record your
answer on the computer and on your data table on the answer sheet.
5.
Select “Find Epicenter”.
a.
a. If “Excellent work” comes up, then continue
b.
If “Very close” comes up, then choose “Remeasure S-P interval”
6.
Choose Compute Richter Magnitude. Continue reading through the pages.
7.
Fill in the Max S wave for each station on the computer and in the data table.
8.
Select “Submit to Nomogram.”
9.
Determine the magnitude for the earthquake by finding the point on the number line where the three lines
intersect. Record your answer on computer and answer sheet. Click on “Confirm Magnitude.”
10. Your screen should read “Congratulations. You’ve done a great job.”
Fill in your name, CAHS, check
teacher email box and fill in your
teachers email.
Select “Get Certificate.”
11. Select “Execute Virtual Earthquake.”
12. Choose “Southern California” and complete steps 1-11 on the computer without an answer sheet.
13. Repeat for “Japan” and then “Mexico”
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