Reverse Fault

1. Reverse Fault Myah Palechek

2. Reverse Fault • A reverse fault can be compared to a convergent boundary- at both pieces of land collide together • As reverse faults push together, the hanging wall slides up • As convergent boundary is pushed together, the two plates fold up or down creating things like mountains or valleys.

3. Land Formations • When stress is put on a fault, the hanging wall slides up • This causes earthquakes (or when they’re under water- tsunamis.

4. Convection Currents • Partially solid magma below the surface (in the mantle) churning- known as convection currents • Convection currents move plates by putting stress on them

5. How Time Affects Magnitude • Plates move about two inches every year unless they can’t move • The longer a plate can’t move, the more stress is built up • When the stress is released there’s move movement… the longer a plate has to wait, the bigger the magnitude of the earthquake.

6. Focus of an Earthquake • Damage done of an earthquake depends on the depth of the focus • There are three different types of earthquakes: • shallow= 200 feet • intermediate=200-500 feet • deep= 500 feet • Because Earth’s lithosphere is about 500 feet deep typically- deep focus earthquakes normally happen on land

7. Rock Composition • Earthquakes with shallow focus’ can still cause a lot of damage, even if it’s very low magnitude because it doesn’t need to travel as far to reach the surface • If an earthquake has a deeper focus, less damage will be done because the materials on top of it reduce the power of the waves • The greater the mass of the materials above the focus, the more reduction of power there is