Everyone knows the Earth’s movement . It manifests itself in two ways: rotating on itself (24h rotation) or rotating around the Sun (translation performed in 365 days). These would be the outward movements of our planet. However, there is also movement within the earth’s crust. To know these movements it is necessary to use a measurement system : the seismograph.
The seismograph works as a sensor that allows you to feel the Earth’s movements
This sensor is called a seismometer, which is connected to a recording system. As a device, the seismograph collects the various oscillations or tremors (seisms) that cause a vertical or horizontal movement. If the tremors generate movements of certain intensity, occur Earthquakes, which are measured on a scale of measurement known as the Richter scale. Seismograph
The tremors can be mild or more intense and the seismograph registers them as a function of their oscillations
It is not a complex device, as it is possible to manufacture it in a homemade version. The sensitivity of these artifacts allows a punch to record variations in oscillations on a rolled-up paper. When there is no movement, the descriptive line is a straight line, although as the vibrations progress the lines describe traces in an irregular way from top to bottom.
Three types of seismographs are used. Mechanics are those that work according to the principles of pendulum movement and are used in areas with few technical resources . Electromagnetics contain a magnet, which, when performing a movement in the soil layers, causes an electrical current proportional to the changes in movement. There are also broadband seismographs, designed with powerful sensors to detect the speed of movement within the earth’s crust. Seismograph
Earthquake specialists, seismologists, still do not have a technology that allows them to predict with absolute certainty the appearance of Earthquakes, although it is possible to estimate the probability of occurrence of this natural phenomenon.
The effectiveness of seismographs is therefore useful for measuring and evaluating tremors, but not for sensing them in advance. In relation to pre-seismic movements, there is a study scientific who believes in the ability of some animals to anticipate Earthquakes. This is due to their sensitivity to detect higher frequency electromagnetic signals. Seismograph
