Have you felt the
earthquake? When the earthquake happened, suddenly felt dizzy and his head seemed to spin. Why is
this happening and what was actually an
earthquake? To find out, you can read this article.
An earthquake is a vibration (shock) that occurs due to movement (shifting) the rock layers of the earth from the bottom or below the earth's surface and also due to volcanic eruptions.
Earthquakes often occur in areas located close to the volcano and also in areas surrounded by vast oceans.
Factors Earthquake Causes
The first factor is because the shift and the separation of the layers contained in the crust. The second, due to volcanic eruptions tremendous. Powerful eruption in addition also caused a strong shock is often caused a wave of very high waves in the ocean waves known as "Tsunami".
Types of Earthquakes
Of the factors that cause the occurrence, then the earthquake can be classified into two. First called the quake "Tectonics". Tectonic earthquakes occur because the Earth's crust is hard to be critical (soft) and finally moved. The theory of "Plate Tectonics" explaining that the earth consists of several layers of rock, most areas of the crust will float and float in layers like snow. Stir gently layer so divided in pieces and collided with each other. This is what causes the Tectonic Earthquake.
Volcanic earthquakes are rare when compared with tectonic earthquake. Volcanic earthquake occurred due to volcanic eruptions tremendous. the vibration and its eruptions shocks can feel up to as far as 20 miles.
History records that, in Indonesia has occurred volcanic eruptions tremendous in 1883 eruption of Mount Krakatau is located in west Java. This eruption caused shock and noise that sounded as far as 5000 Km. The eruption also caused a tidal wave "Tsunami" tall and 36 meters sea casualties of this eruption about 36,000 souls.
Therefore, to know the volcanic activity, people with reason have been successfully made to measure volcanic activity and earthquake magnitude measurement tool. The size of this earthquake is known as Richter, together with the names of people who create and develop the Charles Richter.