Men & Women of Seismology
Emil WiechertA pioneer in the science of seismology. Wiechert's first seismograph was a horizontal-pendulum instrument, which recorded photographically. He used an inverted pendulum stabilized by springs and free to oscillate in any direction horizontally. The seismograph was completed in 1900. The Wiechert inverted-pendulum seismometer is probably the earliest seismograph which is still used, in essentially its original form, in some modern seismological observatories. |
