For an attention-getting classroom demonstration, the software's filters can be applied to the data to tune the display to emphasize the typical vibrations caused by students' movements or to eliminate those vibrations and show only seismic events. Provides real-time detection of magnitude 3.5 earthquakes up to 150 km away and magnitude 6.5 quakes anywhere in the world! The heart of the seismometer is its long horizontal boom. One end of the boom is supported by a spring and has a heavy magnet and balance weight. The other end of the boom has a knife-edge that pivots on a vertical post. A vane mounted on the boom is immersed in a container of damping oil to dampen boom movement. The magnet on the boom fits over a coil mounted on the seismometer's base. When a vibration or earth tremor shakes the instrument, the boom and magnet move, generating an electrical signal in the coil by induction. The signal is amplified in the interface box and passed to the computer to be recorded and displayed. To ensure long and trouble-free operation, we strongly recommend that you purchase the available clear acrylic Dust Cover to protect the instrument from dust accumulation and drafts. Includes: Seismometer Bubble Level Interface Box (with cables) Assembly Wrench Software on CD-ROM Instruction Manual Needed but not Included: 175 mL Damping Oil (equal parts STP® Oil Treatment and 10W-40 synthetic motor oil)

Boom: 390 mm L × 38 mm W Mass: 420 g Spring: 267 mm L (relaxed length), 7.7 mm diam, 830 N/m modulus Natural Period of Boom: 3 s Damping Oil Capacity: 175 mL Seismometer Dimensions: 465 mm L × 210 mm W × 320 mm H Weight: 1.68 kg

Built on the proven IRIS (Incorporated Research Institutions for Seismology) pattern, this vertical seismometer can be placed at any stable, relatively undisturbed location in your school. It will continuously deliver seismic signals to a computer for storage, analysis, and display. It detects the P and S waves generated by an earthquake and slower Rayleigh-type surface waves, as well. The School Seismometer comes with Windows® software that displays a full day's recording on a single screen and automatically saves and organizes the data for later analysis.

The software supports the identification of different types of ground waves in an earthquake, extraction of the earthquake signal, and determination of the distance and intensity of the quake.