ERS120H5 Lecture Notes - Lecture 9: 2004 Indian Ocean Earthquake And Tsunami, Richter Magnitude Scale, Megathrust Earthquake
Document Summary
Earthquakes vibration produced by the rapid release of energy caused by movement along a fault. Distribution of earthquake activity occurs along the tectonic plate boundaries. Subduction zones between continental and oceanic plates can cause major earthquake activity and is common for island countries. Earthquake waves aftershocks between rocks result from the release in stress from the principle earthquake. Seismogram record stating details such as force (magnitude) and duration, the horizontal axis represents time and the vertical axis represents amplitude, can be used to analyze p waves, s waves, surface waves, and aftershock. P s wave interval the difference in the amount of time it takes between a p wave and an s wave to travel (p waves move the fastest, then s, then surface) S time in km/s, magnitude, and the amplitude in mm: moment magnitude scale measures earthquakes based on amount of energy released, each sphere represents amount of tnt explosive force.
