EESA06H3 Lecture Notes - Lecture 3: Fault Scarp, Asthenosphere, Subduction
30 Jun 2014
School
Department
Course
Professor
Document Summary
Eesa06 week 3, lecture monday, january 20, 2014. Earthquakes as energy sources to map the interior of the planet. P and s waves and their differing velocities. Heat flow and gravity methods for identifying deep structure. Mantle plumes, subducting lithospheric slabs (also referred to as tectonic plates) Rigid lithospheric plates moving over the softer asthenosphere. Types of tectonic plates and plate margins: divergent, convergent and transform. Why are we interested in earthquakes: provides information about the earth"s interior that we cannot get any other way. Surface of where the earthquake is triggered is where most of the energy is produced: referred to as focus (200 m 700 km) Seismic waves where the energy radiates out. 1891 fault scrap from the nobi earthquake in japan (killed 7 000 people: emerged seismology (study of earthquakes, demonstrated earthquakes happened in faults. Waves (fig 3. 5: body waves goes through interior of planet, surface waves . Travels around the planets exterior: primary waves .
