there are many devices, such as a seismometer. copy and paste URL below to your address bar for more info.
http://en.wikipedia.org/wiki/Seismograph
Earthquakes are detected and measured using seismometers or seismographs.
Because they are detected by seismometers.
Vibration testing is not typically used to detect earthquakes. Earthquakes are usually detected using seismometers, which are specialized instruments designed to measure ground motion caused by seismic activity.
Seismographs utilize the principle that seismic waves generated from earthquakes cause the ground to shake, which is then detected as motion by the instrument. The seismograph records these ground movements as a graph, providing valuable information for studying and monitoring earthquakes.
yes
Earthquakes in the ocean may cause tsunamis.
Any and all plate motion causes earthquakes.
They are detected using seismometers. See the related links.
Form is detected by cells called edge detectors, while motion is detected by cells called motion detectors, both of which are present in the visual system. These cells are responsible for detecting specific features in the environment to help with processing visual information.
seismogram
The weakest earthquakes, measuring less than 2.0 on the Richter scale, can occur anywhere around the world. These earthquakes are generally not felt by people and are often only detected by seismographs.
The energy released by earthquakes take the form of seismic waves which travel through the ground. These are detected by a seismograph. Based on the amplitude of the seismic waves measured by the seismograph the earthquakes strength can be calculated (to give a value on the Richter scale). Large earthquakes can cause permanent displacements / deformation at the Earth's surface whereby the change in position of an object can be detected using GPS.