Earthquakes can happen anywhere and at any time. Although most occur 50 miles (80 km) or less below the Earth’s surface, they’re just too many – and they happen too randomly – for geologists to predict. Roughly half a million quakes rumble every day!
Reliable predictions require precursors – some kind of signal in the earth that indicates a big quake is on the way. The signal has to happen only before large earthquakes and it has to occur before all big quakes. At the moment seismologists have failed to find those precursors – if they even exist.
Picture Credit : Google
