The P-Wave Focusing Effect in a Low-Velocity Core of the Earth: Analytical Solution

Аннотация

This paper reports the calculation data on wave fields for the Earth’s model including the mantle and external and internal core with real parameters. The investigation has made it possible to identify physical phenomenon unknown previously such as the formation of the wave field focusing region in the Earth, emerging to the day surface before the first PKP-wave. This is due to the fact that spherical bodies (in this case, the low-velocity core of the Earth) are characterized by the collecting lens properties.