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Main article: Seismic wave. Earthquakes, and other sources, produce different types of seismic waves which travel through rock, and provide an effective way to image both There are three basic types of seismic waves in solids: P-waves, S-waves (both body waves). — “Seismology - Wikipedia, the free encyclopedia”, en.wikipedia.org
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Prior to the introduction of modern seismic codes in the late 1960s for developed. — “Seismic Retrofit - Wikipedia”, en.wikipedia.org
In 2008, the Municipal Services Building of the City of Glendale, California was seismically retrofitted using an innovative combined vibration control solution: the existing elevated building foundation of new seismic design philosophy that will provide the necessary mechanisms to safely. — “Earthquake engineering structures - Wikipedia, the free”, en.wikipedia.org