USING A SIMPLE, INEXPENSIVE AS1 SEISMOGRAPH IN TEACHING AND RESEARCH
The seismograph makes possible several interesting learning experiences. Its installation will enable student to learn how a seismograph works. The seismograms of earthquakes together with travel-time curves enable students to determine the distance to the earthquake. The AmaSeis program is used to calculate the magnitude of the event. The event may also be filtered to enhance observed frequencies and a Fourier transform used to analyze the frequency content of the seismogram.
In 2009, over 100 earthquakes were recorded by the AS1. Several of the seismograms of these earthquakes will be presented to show how phases on the event are recognized and how distance to the event is determined. Examples will be given on how magnitude is calculated and a Fourier transform determined. The effectiveness of the seismograph, and the simplicity of its use and installation should make this instrument available to all schools.