5.2 science earthquake measurements

instruments located or near the surface of the earth that record seismic wave

a tracing of earthquake motion and is created by a seismograph

the point on earths surface directly above an earthquakes starting point, or focus

the point along a fault at which the first motion of an earthquake occurs

perhaps the simplest method by which seismologists find an earthquake’s epicenter is the S-P time method

throughout much of the 20th century, seismologists used the Richter magnitude scale, to measure the strength of earthquakes

a measure of the degree to which an earthquake is felt by people and the amount of damage caused by the earthquake, if any, is called intensity.