Earthquake Notes ____________________ are natural vibrations of the ground caused by ___________________ along _____________________ ____________________ in Earth’s Crust Caused by ____________________ slipping along ______________________ ______________________ Can happen along any type of _______________________ ________________________ A _____________________ is a fracture on/in the Earht’s crust that occurs when ____________________ is applied too quickly. Area where _____________________ occur ____________________ ____________________ occur as a result of compression ____________________ ____________________ - the upper part of a fault ____________________ - the lower part of a fault ____________________ ____________________ occur as a result of tension 2 pieces of crust are ___________________ apart. ____________________ ____________________ ____________________ occur as a result of shear stress 2 pieces of ____________________ are pulled passed each other. ____________________ ____________________ ____________________ (San Francisco) The _____________________ is the point where an earthquake originates. The ____________________ is the point on Earht’s surface directly ABOVE the focus. The study of earth quake waves is called ____________________. The instrument for measuring the ____________________ is called a _____________________ or ____________________ The ____________________ of the ground during an earthquake are called ______________________ _____________________ ____________________ ____________________ - pull rocks in the SAME direction. o Can move through solids and liquids _____________________ _____________________ - causes rocks to move at RIGHT angles. o Can ONLY move through solids ____________________ ____________________ - move in TWO directions. Cause the MOST DAMAGE!! Time Travel Curves ___ _________ are always detected first (MOVE FASTER) With increasing distance there is a greater difference between the arrival time of _____ and _____ waves The difference in arrival time between __________ and __________ waves can determine HOW FAR away the earthquake is Earthquake Magnitude The ____________________ _____________________ measures the largest seismic waves generated in an ____________________. o The _____________________ genereated by a 5 are 10% larger than the waves generated by a 3. Earthquake Magnitude The amount of ____________________ released from an earthquake is based on the number __________. o A 3 releases 32X the amount of energy as a 2. Other Hazards associated with Earthquakes