ERTH 2415 Lecture Notes - Lecture 7: Nomogram, Logarithmic Scale, Epicenter
19 Jun 2015
School
Department
Course
Professor
Document Summary
3 types of fault : normal fault, reverse fault and strike-slip fault: normal fault the hanging wall moves down relative to the footwall. Happens when the system experiences the force of tension: reverse fault the hanging wall moves up relative to the footwall. Happens when the system experiences the force of compression: strike-slip horizontal movement: when two blocks of rock move alongside each other. Seismometer is a sensor that detects earth motion. Further division of body waves into 2: primary and secondary waves. P wave is a wave where the particle motion is in the same direction as the direction of propagation. Properties of p waves: compressional energy, small amplitude, really fast, propagates in solids and fluids. S wave is a wave where the particle motion is perpendicular to the direction of propagation. Properties of s waves: shear energy, larger amplitude then p waves, 1. 7 times slower than p waves, propagates in solids only.
