it has a curved graphing surface.
It is used to locate an earthquakes epicenter,
it uses a needle on graph paper to measure seismic wave activity,
it determines the arrival time of P waves,
measures data used to find the difference between the arrival times of surface waves.
Explanation:
All the given options are correct. Seismograph or seismometers are used to measure seismic activities within the earth surface at a seismogram station.
- They are made up of curved graphing surface with a needle on graph paper measuring seismic wave activities.
- Using the method of triangulation from three seismographs, the epicenter of an earthquake can be located.
- The first wave to reach a seismic station is a p-wave.
- P-waves are primary body waves.
- Seismographs can be used to measure their time of arrival and the difference between the arrival times of surface waves.
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