1 - SEISMOLOGY : SEISMOS : (Greek Word) - Shaking LOGUS :...

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Unformatted text preview: SEISMOLOGY : SEISMOS : (Greek Word) - Shaking LOGUS : (Greek Word) Science or treaties So Seismology -> The study of shaking of earth Seismology is the branch of Geophysics concerned with the study and analysis of Earthquakes and the science of energy propagation through the Earth's crust. Engineering Seismology is concerned with the solution of engineering problems connected with the Earthquakes. Seismology is extremely important because: Study of earthquakes gives us important clues about the earths interior Understanding earthquakes allows us to minimize the damage and loss of life What is the scientific explanation for damage or lack thereof when structures are subjected to seismic strong motion?  What are the essential characteristic properties of the seismic wave inputs to the affected structures?  What is the seismicity, i.e., a specified regions earthquake source characteristics? To understand the origins and forces caused by earthquakes. o To know how to design buildings to protect life safety in the face of those forces. o To put that knowledge into practice. January 22, 2008 6 e Understand the hazards  Build new structures safely  Retrofit old structures starting with critical infrastructure  Prevent non-structural damage  Respond properly Includes evacuation of tsunami-prone areas The global distribution and rates of occurrence of earthquakes, o the causes of earthquakes, o the implications of earthquakes for the dynamic geological changes that they cause, o the physics of the earthquake source, o earthquake prediction, o the physics of elastic wave propagation in general and in the Earth (seismic waves are elastic waves in the Earth), o techniques for recording seismic waves, the relationship between the earthquake source and the consequent seismic waves, o other geological causes of seismic waves, o artificial sources of seismic waves, o ways to determine Earth structure from records of natural and artificial seismic waves, o elastic and inelastic structure of the Earth, o the characteristics of seismic shaking at all distances from the earthquake, but particularly where the motion is strong, o seismic hazard analysis What is an earthquake? What is an earthquake? An earthquake is the vibration of Earth produced by the rapid release of accumulated energy in elastically strained rocks Energy released radiates in all directions from its Energy released radiates in all directions from its source, called the source, called the focus focus or or hypocenter hypocenter Energy propagates in the form of Energy propagates in the form of seismic waves seismic waves The instrument which record the event The instrument which record the event is called is called Seismometer Seismometer Release of Accumulated energy Release of Accumulated energy Hypocentral Distance Epicentral Distance Recording Station Focal depth The most dramatic variations in Earth structure...
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This note was uploaded on 10/26/2008 for the course CIVIL 602 taught by Professor Duta during the Spring '08 term at Air Force Institute of Technology, Ohio.

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1 - SEISMOLOGY : SEISMOS : (Greek Word) - Shaking LOGUS :...

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