Realtime Rating Summary. The adjacent table gives investors an individual Realtime Rating for PPLT on several different metrics, including liquidity, expenses, performance, volatility, dividend, concentration of holdings in addition to an overall rating.
Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.ain Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
Image credit: NASA. The two main answers to âhow earthquakes happenâ is: as a result of tectonic plates colliding and volcanic eruption. The shock waves associated with nuclear weapons testing and other man-made explosions. To be considered an earthquake a shock wave has to be of natural origin.Earthquakes Caused By Tectonic Plates: The theory of plate tectonics explains how the crust of the Earth is made of several plates, large areas of crust which float on the Mantle.Since these plates are free to slowly move, they can either drift towards each other, away from each other or slide past each other.Many earthquakes happen in areas where plates collide or slide past each other. The Elastic Rebound Theory applies to these quakes.ince these plates are free to slowly move, they can either drift towards each other, away from each other or slide past each other. Many earthquakes happen in areas where plates collide or slide past each other. The Elastic Rebound Theory applies to these quakes.