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Earthquake Seismographs for Volunteers to Operate in K-12 Classrooms

Earthquake Seismographs for Volunteers to Operate in K-12 Classrooms. Wayne D. Pennington Shannon E. Bair Seth R. Lemke Michigan Technological University. Project background The plan Software development and features Where we’re headed. Purpose.

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Earthquake Seismographs for Volunteers to Operate in K-12 Classrooms

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  1. Earthquake Seismographs for Volunteers to Operate in K-12 Classrooms Wayne D. Pennington Shannon E. Bair Seth R. Lemke Michigan Technological University

  2. Project background • The plan • Software development and features • Where we’re headed

  3. Purpose • To provide low-cost earthquake seismographs for use by volunteers in schools. • Expose students to geophysics and hands-on science early in their education.

  4. Similar Programs • MichSeis • Larry Ruff, Univ.of Michigan • PEPP • Princeton Earth Physics Project Permanent, near-research quality observatories

  5. History of the Project Upper Peninsula Seismic Experiments In Schools

  6. MichSeis and PEPP programs are designed for permanent installations and dedicated staff • Teachers wanted a temporary seismic station • Needed user-friendly program • Grant from SEG made this possible

  7. The Plan • Develop a user-friendly, interactive program • Use an extremely simple and portable system A to D Converter

  8. How do we do this? • Use the low-cost EAI S102 long-period seismograph • Use a Macintosh or PC with an inexpensive A to D converter • Write user-friendly interface with LabView software

  9. What is LabView? • Software that uses the iconic programming language G.

  10. Indian Ocean earthquake, June 18, 2000 Mb=7.8 Universal Time, so that earthquakes can be identified from global observations. Today’s date Local Time P-Wave SurfaceWaves The most-recent 30 minutes, continually scrolling slowly across to the left. Current instant; record is added to end, rather than scrolling across.

  11. Indian Ocean earthquake, June 18, 2000 Mb=7.8 Slider-bar control for instantly chang- ing the display gain of the day’s record. Option to record data at one sample or 10 samples per second Slider-bar control for instantly changing the display gain of the 1/2-hour record.

  12. Indian Ocean earthquake, June 18, 2000 Mb=7.8 Night-time background noise level. Data recorded prior to midnight (yesterday, in Universal Time) is shown in gray, indicating that it is nearly one day old. Data recorded since midnight (Universal Time) is shown in yellow, in these four-hour blocks.

  13. Indian Ocean earthquake, June 18, 2000 Mb=7.8 The Stomp and yell box shows the output from a hi-frequency geophone, designed to dramatically show the effect of jumping in front of the seismograph (not recorded). Amplitude of signal at this instant (changes each second). Name of file to which data is currently being written.

  14. First, let’s look at a whole day of data. Now that we’ve recorded an earthquake, we can look at it in different ways using the Viewer program:

  15. View One Day

  16. Next, let’s save the portion of the day containing the quake.

  17. Name of quake file Scrollbars allow you to search the data to find the quake Start Time Length of Time Save the Time Span of an Earthquake

  18. We can also recreate the earthquake arrival.

  19. Recreate the Occurrence of an Earthquake

  20. Now we can stretch the quake to identify the waves.

  21. Stretch the Earthquake Waves

  22. Finally, we have several filtering options.

  23. Select a Filter

  24. Low Pass Filter

  25. High Pass Filter

  26. Enter Nodes for the Advanced Band Pass

  27. Advanced Band Pass Filter

  28. Frequency Spectrum

  29. The Future • Test the program in Upper Peninsula schools • Train volunteers to work with their local schools • Provide one day training courses in conjunction with SEG, AAPG, AGU, IRIS, and other local societies

  30. Acknowledgments • SEG Foundation • Larry Ruff, University of Michigan

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