[ noun ] a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) <noun.artifact>
Seismograph \Seis"mo*graph\, n. [Gr. ??? an earthquake + -graph.] (Physics) An apparatus for registering the shocks and undulatory motions of earthquakes.
Nearly 130 miles to the north, the line traced by a wandering pencil on a seismograph at the University of Washington was first interpreted as evidence of a tremor 75 miles southeast of the dormant volcano.
The Richter scale measures energy released by an earthquake in relation to ground motion recorded on a seismograph.
The Richter scale gauges the energy released by an earthquake, as measured by the ground motion recorded on a seismograph.
The scale is a guage of the energy released by an earthquake as measured by the ground motion recorded on a seismograph.
The scale is a gauge of energy released by an earthquake, as measured by ground motion recorded on a seismograph.
The Richter scale gauges energy released by an earthquake as measured by ground motion recorded on a seismograph.
The Richter scale gauges the energy released by an earthquake as measured by the ground motion recorded on a seismograph.
But there's nothing 10 miles south of King Salmon but tundra." The Richter scale is a gauge of the energy released by an earthquake as measured by the ground motion recorded on a seismograph.
The Richter scale is a guage of energy released by an earthquake, as measured by ground motion recorded on a seismograph.
The Richter scale is a measure of the energy released by an earthquake, as measured by ground motion recorded on a seismograph.
The scale is a gauge of the energy released by an earthquake as measured by the ground motion recorded on a seismograph.
The Richter scale is a gauge of the energy released by an earthquake, as measured by ground motion recorded on a seismograph. An earthquake measuring 3.5 can cause slight damage in the immediate area.
The open-ended Richter scale is a gauge of energy released by an earthquake, as measured by ground movement recorded on a seismograph.