Take the Pulse of Your Classroom

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Seismogrph monitoring

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  • Classroom Activities


Incorporated Research Institutions for Seismology (IRIS), Earth Science Week (ESW), Ameican Geosciences Institute (AGI)


Elastic waves that move through the Earth are called seismic waves. Want to study them more closely? SeisMac is a free application that displays the output from the Sudden Motion Sensor in recent Mac laptops as a real-time, three-axis, acceleration graph, or, more commonly, a seismogram. Once your class has received some instruction on seismic waves, the following activity can leverage SeisMac technology to help students understand how a seismometer records ground motions. Consider: What information does a threecomponent seismogram express? How are S and P waves identified on a seismogram? How do seismic waves travel through the Earth?

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