The Earth is layered
Major Plates of the World
Historical Movement (Past 250mya)
Evidence of Past Plate Movement
Magnetic Reversals
Magnetic Reversals
Magnetic Reversals
Magnetic Reversals
Location of Earthquakes
Convergent Boundaries
Transform Boundary
Divergent Boundary
Plate Boundary Review
Plate Boundaries
Plate boundaries are seismically active:
EarthquakesVolcanoesMountains
Causes of Earthquakes
• Eruption of a volcano• Collapse of a cavern• Impact of a meteor• Stress that builds up between two
lithospheric plates.
EQ’s release energy in the form of waves
EQ waves are recorded using a Seismograph
Earthquake P-Wave and S-Wave Travel Time – For EQ Location
Can you find the Epicenter?
• Seismic Stations P-wave arrival times:• Calculate:
– 1. distance from seismic station and;– 2. epicenter for each case study.
• Case Study I:
– Denver 2:40– New Orleans 2:00– Scranton 2:50
• Case Study II:
– Cancun 4:00– Boston 3:20– Juneau 4:50