Woah, WAIT, is that... EARTHQUAKE!!! Image: From Tappity What is an Earthquake? An earthquake is a series of shocks, seismic waves or tremors that result from a sudden release of pressure. Focus : Point below the surface where seismic waves radiate from the source/origin Epicentre : The point on the surface immediately above the focus of the earthquake, this is where the most damage can be noted. Causes of Earthquake Activity: Physically Induced: Tectonic plates moving against each other or where there is volcanic activity Human Induced: Mining, drilling to the earth, underground explosions N.B: These contribute to the inducing of earthquakes as the create shock waves which cause changes (pressure changes) in the rock strata. Types of Earthquake Waves: Two types of seismic waves can occur, following the event of an earthquake. 1. Body Waves : Shock waves that are transmitted upwards to the surface from the focus. It can be divided into: P...
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