instrument that respond to ground motions such as caused by earthquakes, volcanic eruptions and explosions
A seismograph.
They're seismic waves. seismic waves are waves of energy that travel through the Earth's layers, and are a result of an earthquake, explosion, or a volcano that imparts low-frequency acoustic energy. Many other natural and anthropogenic sources create low amplitude waves commonly referred to as ambient vibrations. Seismic waves are studied by geophysicists called seismologists. Seismic wave fields are recorded by a seismometer, hydrophone (in water), or accelerometer.
A seismograph is an instrument that measures the seismic wave activity in an area. According to Wikipedia, Seismometersare instruments that measure and record motions of the ground, including those of seismic waves generated by earthquakes, nuclear explosions, and other seismic sources. Records of seismic waves allow seismologists to map the interior of the Earth, and locate and measure the size of these different sources. A seismic wave, according to wikipedia is, "Seismic waves are waves of force that travel through the Earth or other elastic body, for example as the result of an earthquake, explosion, or some other process that imparts forces to the body. Seismic waves are also continually excited on Earth by the incessant pounding of ocean waves (referred to as the microseism) and the wind."Seismograph is another Greek term from seismós and γράφω, gráphō, to draw. It is often used to mean seismometer, though it is more applicable to the older instruments in which the measuring and recording of ground motion were combined than to modern systems, in which these functions are separated. Both types provide a continuous record of ground motion; this distinguishes them from seismoscopes, which merely indicate that motion has occurred, perhaps with some simple measure of how large it was.
Seismic sea waves are also called a tsunami.
seismologists
Seismologists.
A seismograph is used to detect and record seismic waves caused by earthquakes or other sources of ground vibrations. It measures the amplitude and duration of these waves to help seismologists monitor and study seismic activity around the world.
Seismometer (or seismograph) and it measure seismic waves
Seismologists are people who study earthquakes and the propagation of earthquake waves (more correctly termed seismic waves) through the Earth.
instrument that respond to ground motions such as caused by earthquakes, volcanic eruptions and explosions
A seismometer, also known as a seismograph, is the instrument that produces patterns indicating earthquakes. It measures the ground motions caused by seismic waves and records them as seismic waves on a seismogram. These patterns help seismologists analyze the earthquake's magnitude, depth, and location.
A seismograph is an instrument that produces a record of seismic waves by detecting and measuring the vibrations caused by earthquakes or other seismic events. It consists of a seismometer to detect ground motion and a recording device to produce a trace of the detected seismic waves.
Seismic waves such as P-waves and S-waves have been crucial for seismologists in studying the Earth's interior. These waves travel through the Earth at different speeds and can provide information about the composition, density, and structure of the Earth's layers. By analyzing how seismic waves behave as they pass through the Earth, seismologists can gain insights into its internal properties.
Seismologists measure seismic waves generated by earthquakes to study the Earth's interior structure and tectonic activity. They also measure seismic activity to monitor and detect potential seismic hazards and assess earthquake risk in specific regions.
Seismologists determine the type of waves produced by earthquakes by analyzing the arrival times of P-waves and S-waves at different seismic stations. P-waves are the first to arrive and are compressional waves, while S-waves are slower and are shear waves. By studying the characteristics of these waves, seismologists can classify the earthquake waves and understand the nature of the seismic event.
A seismograph.