An earthquake has just occurred. seismic waves from the earthquake are detected at two recording stations.

because the center-south is called the heart of the country

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.