GEOLOGY

Detailed explanation-1: -When you look at a seismogram the wiggles you see are an indication that the ground is being, or was, vibrated by seismic waves . Seismic waves are propagating vibrations that carry energy from the source of the shaking outward in all directions.

Detailed explanation-2: -A seismogram is a record of the ground motions caused by seismic waves from an earthquake. A seismograph or seismometer is the measuring instrument that creates the seismogram. Almost all seismometers are based on the principle of inertia, that is, where a suspended mass tends to remain still when the ground moves.

Detailed explanation-3: -Seismograph is the instrument that records the tremors of an earthquake. This instrument also helps seismologists to map the interior of the Earth.

Detailed explanation-4: -How does a Seismograph record earthquake data? As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion.

Detailed explanation-5: -A seismogram is the recording of the ground shaking at the specific location of the instrument. On a seismogram, the HORIZONTAL axis = time (measured in seconds) and the VERTICAL axis= ground displacement (usually measured in millimeters).