earthquakes 15

earthquakes 15 - Earthquakes 15 November 1st, 207 Why is...

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Earthquakes 15 November 1 st , 207 Why is damage where it is? Five controls - Source effects: issues related directly the specifics on that seismic rupture. If you  stand on the side of the road and a truck drives past you, you experience high pitch  going towards, low pitch going away, known as Doplar effect.  o 1. Magnitude : Size of earthquake (how much energy is released)  is a basic  control on the damage of earthquake.  o 2. Location/proximity to site: proximity to the seismic source generally means  more damage.  o 3. Frequency content of seismic waves: earthquakes release energy over  wide spectrum of frequencies. The bigger the earthquake, the richer it tends  to be in low frequencies. Low frequency waves affect big things such as,  buildings, dams, skyscrapers.  o 4. Directivity: under certain circumstances, seismic energy can be  preferentially directed in one preferred direction. Killer pulse will destroy 
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