The normal fault is when the footwall is above the hanging wall. Tension force creates a normal fault.
The reverse fault is when the hanging wall is above the foot wall. Compression force creates a reverse fault.
A shield volcano has gently sloping flanks and erupts runny lava. It produces quiet eruptions and it forms at hotspots.
Describe the Primary Wave.
The primary wave which is also referred to as compressional waves, it travels parallel to the direction of motion, it travels through the planet, it travels through solids and liquids and is the fastest wave.
The strike-slip fault is when the hanging wall and the footwall are when they are sliding away from each other. Shear force creates a strike-slip fault.
The composite volcano has steep sloping flanks and erupts thick (silica-rich) lava, volcanic ash, and cinders. It also produces highly explosive eruptions. And it forms along convergent (subducting) plate boundaries.
How do earthquakes affect the Earth's surface?
It violently shakes and moves Earth's surface, creates large cracks in Earth's crust, causes buildings to crack, causes chimneys to collapse, some houses can collapse, pipes can break, railroad tracks bend, it causes landslides, bridges can collapse, structures can crumble, liquefaction occurs, and it can also cause tsunamis.
The secondary wave, which travels perpendicular to the direction of motion, it travels through the planet, it travels through solids and travels slower than P-waves.
Because a volcano sits over a large magma chamber of molten rock, it creates a conical structure. And the volcano grows with each eruption of molten rock. The base of the volcano is a broad, circular structure. This molten rock is called magma. The magma travels up a long pipe, called a conduit, toward the surface. As the conduit nears the surface, it expands, forming the throat. The vent is the opening of the volcano at the Earth's surface. At the summit of a volcano, the vent may form a large, bowl-shaped area called a crater. If a crater and the land around it collapse after an eruption, a large depression called a caldera forms. If the volcano becomes unstable, smaller conduits, called branch pipes, may transport magma to Earth's surface along the side, or flank, of the volcano. The branch pipes feed parasitic cones that form along the volcanic flank. If a branch pipe does not reach Earth's surface, the magma forms a sill or a dike. A sill is a layer of igneous rock that is horizontal to the surrounding bedrock. A dike is a layer of igneous rock that cuts through the surrounding bedrock diagonally.
The surface wave, which travels across the surface of the planet, it causes the crust to move side to side and up and down, and travels slower than a P-wave or an S-wave.