A seismograph is an instrument used by scientists to measure the motions of the Earth's surface. A seismograph is a simple pendulum. When the ground shakes, the base and frame of the instrument move ...

It’s more surprising than earth shaking for those learning for the first time that the internationally acclaimed inventor of the Richter Scale of earthquake measurement was from Butler County. On ...

Every time a big earthquake is reported on the news, two pieces of information are immediately available. The first is the strength of the earthquake. The announcer might say, "The quake measured 7.4 ...