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Earthquakes

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Surface waves Love waves, Rayleigh waves. Earthquakes. Earthquakes ... Gravity gravity meter, gravity anomalies (positive & negative) Earth's Interior ... – PowerPoint PPT presentation

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Title: Earthquakes


1
Earthquakes
  • Earthquakes - ductile-vs-brittle behavior,
    seismic waves, focus (hypocenter), epicenter

2
Earthquakes
  • Seismic waves - body waves surface waves
  • Body waves P-waves (compressional)

3
Earthquakes
  • Body waves S-waves (transverse / shear)

4
Earthquakes
  • Surface waves Love waves, Rayleigh waves

5
Earthquakes
  • Seismographs, seismograms, time-travel curves,
    depth of focus

6
Earthquakes
  • EQ measurements type amount of damage, amount
    of energy released
  • Intensity modified Mercalli scale
  • Magnitude Richter scale, seismic moment
    magnitude
  • Ground motion, ground displacement

7
Earthquakes
  • Ground motion, ground displacement

8
Earthquakes
  • Ground motion, ground displacement

9
Earthquakes
10
Earthquakes
  • Earthquake prone areas Circum-Pacific Belt,
    Mediterranean-Himalayan Belt, Benioff zone

11
Earthquakes
  • Earthquake prone areas Circum-Pacific Belt,
    Mediterranean-Himalayan Belt, Benioff zones

12
Earthquakes
  • Divergent plate boundary shallow EQs with
    normal faulting

13
Earthquakes
  • Transform plate boundary shallow or
    intermediate EQs with strike-slip or oblique-slip
    faulting

14
Earthquakes
  • Convergent plate boundaries Collision zones
    shallow EQs with normal reverse faults
    Subduction zones shallow to deep-focus EQs

15
Earthquakes
  • Earthquake prediction monitor measure changes
    in strain field, water levels in wells, radon
    emission levels in wells, tilting of land
    surfaces, changes in elevation, animal
    behavior(?)

16
Earths Interior
  • Geophysics seismic waves, earths magnetic
    field, gravity, heat, electrical conductivity /
    resistivity
  • Seismic reflection, seismic refraction
  • Crust, Mohorovicic discontinuity (Moho), mantle,
    core

17
Earths Interior
18
Earths Interior
19
Earths Interior
20
Earths Interior
21
Earths Interior
  • Earths magnetic field

22
Earths Interior
  • Earths magnetic field

23
Earths Interior
  • Magnetic anomolies

24
Earths Interior
  • Geophysics seismic waves, earths magnetic
    field, gravity, heat, electrical conductivity /
    resistivity

25
Earths Interior
  • Crust, Mohorovicic discontinuity (Moho), mantle,
    core

26
Earths Interior
  • P-wave shadow zone, S-wave shadow zone

27
Earths Interior
  • Core mantle convection

28
Earths Interior
  • Core composition based on density measurements
    calcs, composition of meteorites, existence of
    magnetic field

29
Earths Interior
  • Isostasy crust in equilibrium with surrounding
    crustal material floats on underlying mantle
    material

30
Earths Interior
  • Isostasy crust in equilibrium with surrounding
    crustal material floats on underlying mantle
    material

31
Earths Interior
  • Isostasy crust in equilibrium with surrounding
    crustal material floats on underlying mantle
    material

32
Earths Interior
  • Gravity gravity meter, gravity anomalies
    (positive negative)

33
Earths Interior
  • Gravity gravity meter, gravity anomalies
    (positive negative)
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