EVERYDAY SCIENCE

Detailed explanation-1: -There are a number of ways to measure the magnitude of an earthquake. Most scales are based on the amplitude of seismic waves recorded on seismometers.

Detailed explanation-2: -A seismograph is the primary earthquake measuring instrument. The seismograph produces a digital graphic recording of the ground motion caused by the seismic waves. The digital recording is called a seismogram. A network of worldwide seismographs detects and measures the strength and duration of the earthquake’s waves.

Detailed explanation-3: -There are two types of earthquakes: tectonic and volcanic earthquakes. Tectonic earthquakes are produced by sudden movement along faults and plate boundaries. Earthquakes induced by rising lava or magma beneath active volcanoes is called volcanic earthquakes.

Detailed explanation-4: -Earthquakes can be measured in two ways. One method is based on magnitude-the amount of energy released at the earthquake source. The other is based on intensity-how much the ground shakes at a specific location.