Geophysics in the 8th Grade:
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Transcript of Geophysics in the 8th Grade:
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IRIS 1999 Wayne D. Pennington
Geophysics in the 8th Grade:
Earthquake Waves Right in
Their Own Backyard
Michigan Technological University
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Volunteer-Run Temporary Seismograph Stations
Simple SoftwareRun for 2-3 MonthsUse Volunteers; train them firstCheap, easy….
We hope!
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Mexican earthquake, magnitude 6.8
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UPSeis:
Upper Peninsula Seismic Experiments In Schools
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The UPSeis Program
One of several established programsIn-classroom experience for K-12University personnel visit schools
Volunteer efforts SEG Foundation purchased equipment
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Working Closely With
MichSeis Michigan
Seismology
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Can non-permanent stations record Earthquakes?
Yes, we do it all the timeJust wait long enough, for a...
Really big one Nearby one Both of the aboveSeismogram
from MichSeis Web site
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How do schools get started?
Teacher or principal... Learns about UPSeis Calls us
We visit school and install In classroom, away from feet Explain to each class
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Step-by-Step: 1
Place Seismograph in classroomLeave it there for 2-3 monthsRecord earthquakes
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Step-by-Step: 2
Record Eq’sLocations:
www.iris.edu
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Step-by-Step: 3
Return and “interpret” seismograms
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The Interpretation Process
Distribute seismograms earthquake lists travel-time curves string globes
PS
LR
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Analyze the Events
Identify earthquake from times on listLocate earthquake on globe (lat,lon)Find distance to hometown (string)Use travel-time curves to identify
arrivals of seismic wavesAdvanced classes: find magnitude
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What do the students learn?
About EarthquakesAbout Geophysics in generalThat real people can do real scienceHow to read a globe!!!Charts and equations
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How is this now possible? 1
New, low-cost ($1500) Broad-band Seismographs Research quality Easy to install and maintain
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How is this now possible? 2
Low-cost computers serve as Data-Acquisition units A-D boards are still expensive, getting cheaper
Low sample rates
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The Seismometer We Use
The S102 from EAI Uses an RF
distance detector
EAI = Electronic Acoustics, Inc.
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What other equipment is used?
Macintosh Computer (any with a full-length NuBus slot) National Instruments A-D board
Plan to expand program with other: Computers A-D boards
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Equipment Plan
That’s All!
AtoD
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But we don’t have a seismic “pier”
That’s OK! We use the floor. Preferably ground floor, but we’ve used upper floors
Big earthquakes are big enough to record anywhere!
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What about people walking?
Doesn’t make a differenceExperiments in class prove it,
and are fun!
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What’s Next?
Improve Software User-friendly Machine-independent Utilize cheaper A-D boards Fool-proof
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Why Am I Telling You?
You can get involvedNext year, we hope
to have a better program in place any company can sponsor workers
to use equipment in schoolsand help our young people be excited about science!
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And Whom Do I Thank?SEG Foundation
Equipment purchase Software re-write
Principals and Teachers Especially Mr. Jim Luoma, Houghton
Original Software author Dr. Larry Ruff, University of Michigan