Earthquake Flashcards
What causes earthquake?
Volcanic
Tectonic
Collapse
A scientist who studies earthquakes and seismic waves.
Seismology
The waves of energy caused by the sudden breaking of rock within the earth or an explosion.
Seismic waves
Energy that travels through the earth and is recorded on ______?
Seismographs
The strength of an earthquake is measured by the_____?
Richter Scale
Types of seismic Waves
- PRIMARY WAVE
- SECONDARY WAVE
- SURFACE WAVE
How strong earthquake feels to observer
Intensity
Related to energy release
Magnitude
The block above the fault is the____?
Hanging wall
The block below the fault is the ______?
Footwall block
If the footwall is above the hanging wall it is called?
Normal slip
If the hanging wall is above the footwall it is called a____?
Reverse slip
Reverse faults are often called____?
Thrust faults
Dip-slip faults on which the hanging wall moves down relative to the footwall
Normal faults
Dip slip faults on which he hanging wall moves up relative to the footwall
Thrust or reverse faults
Strike slip faults across which the block moves to the right
Right-lateral faults
Strike slip faults across which the block moves to the left
Left-lateral faults
Location within the earth where fault rupture actually occurs
Focus
Location on the surface above the focus
Epicenter
Known to have recently generated earthquakes within the last 10,000 years and may still continue to generate earthquakes
Active faults
Do not show signs off ever having generated on earthquake in the last 10,000 years but may possible still generate an earthquake in the future.
Inactive faults
Phivolcs whole name
The Philippine Institute of volcanology and seismology
DOST whole name
Department of science and Technology
PEIS
PHIVOLCS Earthquake Intensity Scale
