Flashcards › Earthquakes Review

earthquake is the shaking and trembling that results from the movement of rock beneath Earth's surface stress a force that acts on a rock to change its shape and volume shearing stress that pushes a mass of rock in 2 oppposite directions compression squeezes rock until it folds or breaks tension pulls on the crust, stretching rock so that it becomes thinner deformation any change in the volume or shape of Earth's crust focus is the point beneath Earth's surface where rock that is under stress breaks triggering earthquake epicenter the point on the surface directly above the focus fault is a break in the crust where slabs of crust slip past each other strike-slip fault the rocks on either side of the fault slip past each other sideways with little up or down motion normal fault the fault is at an angle, so one block of rock lies above the fault while the other block lies below the fault reverse fault same anticline syncline s wave p wave surface waves Mercalli scale Richter scale moment magnitude scale tsunami liquefaction aftershock base-isolated building