The causes of natural disasters and the way the energy that is produced by the shock waves propagates through the surrounding media causing destruction.
Part II- THE INTRICATE LAYERED INNER STRUCTURE OF EARTH. We take for granted the shape of our world and the position of the continents— the familiar geography that seems as eternal as the order of the planets. But this arrangement is temporary: it isn’t how the planet has been and it isn’t how it will […]


