Magnitude/Intensity: Earthquake Measurement and Effects

This lecture covers the measurement of earthquakes through magnitude and intensity scales, focusing on the ground movement, seismic moment, and energy release. It explains how intensity is determined based on observed effects, while magnitude is a measure of the earthquake's energy. The presentation also delves into the factors influencing intensity, such as earthquake magnitude, focal depth, and site effects. Examples from past earthquakes, like the 2010 Chile earthquake, illustrate these concepts. The lecture further discusses the use of seismographs and the Swiss Strong Motion Network for monitoring ground movements. Additionally, it explores the relationship between intensity levels and the resulting damage to structures, emphasizing the importance of understanding these measures in seismic engineering.