The Earthquake is the most destructive natural disaster in the world.
The earthquake is the sudden release of a stress accumulated along the geologic fault or the volcanic activity. The main causes of the earthquake are the Compressional stress, Tensional stress, and shear stress. The most earthquake occurs at the convergent boundary, divergent boundary and transforms plate boundary.
The Earthquake is measured by the seismograph and the recording is called the seismogram. The seismic activity is the size, frequency of an earthquake in a certain area. The seismic activity is 2 main types of body wave and a surface wave. The body wave is 2 types P wave or Primary wave and s wave or secondary wave.