GLY 101LEC Lecture Notes - Lecture 10: Body Wave Magnitude, Surface Wave Magnitude, Mercalli Intensity Scale
8 Oct 2018
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Lag time- time between first p and first s waves. Bigger lag time, further the earthquake occurred from a specific location. If you are right above earthquake, p and s waves are right above each other. R x t = d (rate time times equal distance) One seismic station give infinite possibilities for earthquake epicenter. Two seismic stations narrow it down to two possibilities for epicenter location. You need at least 3 seismic stations to triangulate the location of the earthquake epicenter. Seismic waves stop due to friction absorbing the energy of the waves passing through the material. Whats the difference between richter magnitude and mercalli intensity: on exam! Richter magnitude is a scale to measure amount of energy released by the earthquake and uses regular numbers up to 10. Magnitude is essentially the strength size of an earthquake. It is calculated by measuring the amplitude and relating it to the amount of energy released.
