The scale developed by Richter and Gutenberg (which became known by Richter's name only) was instead an absolute measure of an earthquake's intensity. Richter used a seismograph, an instrument generally consisting of a constantly unwinding roll of paper, anchored to a fixed place, and a pendulum or magnet suspended with a marking device above the roll, to record actual earth motion during an earthquake. The scale takes into account the instrument's distance from the epicenter, or the point on the ground that is directly above the earthquake's origin.