Transcript Monroe.ppt

Monroe Elementary School
10 December 2010
Plate Tectonics, Seismology,
& Earthquakes
Plate Tectonics
How to Explain: Mountains, Volcanoes, Sea Floor Bathymetry
Plate Tectonics
Earth’s Structure
crust is very thin!
oceanic = ~8km continental = 25-70km
Hard Boiled Egg Metaphor
Egg Shell=Crust, Shells slippery inner lining=Lithosphere,
Egg white=Mantle, Yolk=Core
Fit of Continents
Fit of Continents
Earthquake epicenters outline plate
boundaries
Plate Shapes
and
Seismicity
2008 Earthquakes > M5.5
A Century of Earthquakes: 1906-2006
Global Seismographic Network
How Many?
Earthquake Magnitude and Equivalent Energy Comparisons
Simple Seismometer
A simple way to
measure shaking
from
Earthquakes.
Earthquakes
generate Seismic
Waves that travel
around the globe
and tell us about
the Earth’s
interior.
A fence built over a fault…
1906 San Francisco
Earthquake
Fence Offset
Southern
California with
Faults &
the Big Bend
Offset Stream Channels in Central California
Southern California from Space(1)
Southern California from Space
With a Few Major Faults
(1900-1950)
(1850-1900)
Historical
Earthquakes
(1000-1800)
Historical
Earthquakes
(1950-2004)
(1800-1850)
Smith and Sandwell, 2006
Thank You for Your Attention
• Questions?