At which depth below earth’s surface is the boundary between earth’s outer core and stiffer mantle
located?
(1) 700 km (3) 2900 km
(2) 2000 km (4) 5100 km

true

explanation:

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.