Card Set Information
Geo quiz 10
What is a Earthquake?
Any measurable tremor or shaking of the earth's crust.
What is Siesmology?
The study of earthqaukes.
What is Artificial or man-made?
Large explosions and fluid ejections.
What is Large landslides?
Vaiot dam disaster in 1963.
What is Volcanic activity?
Volcanic eruptions and upward movment of magma.
What is Fault movement?
Displacement along the fault.
What is Meterior imapct?
Meteriors stricking the Earth's surface.
What is Body waves?
Seismic waves that travel through the Earth's interior.
What is Primay (p) waves?
A "push-pull" body wave that moves in the wave direction, first wave to arrive at the seismograph.
What is secondary (s) wave?
A type of seismic wave, the S-wave, is one of the two main types of elastic body waves, so named because they move through the body of an object, unlike surface waves.
What is Surface waves?
Seismic waves that travel on the Earth's surface, last wave to arrive at the seismograph, and is responsible for most of the earthquake related damage.
What is Love (l) waves?
A surface wave which causes the ground to move from side to side perpindicular to the wave direction.
What is Rayliegh (R) waves?
A type of surface seismic wave that behaves like a rolling ocean wave and causes the ground to move in an ellipitcal path.
What is a Seismograph?
An instrument used to detect and record earthqaukes.
What is Seismogram?
Paper record of Earth's Vibrations.
What is Benioff zone?
Distinct earthquake zone that begins at an ocean.
What is Focus(hypocenter)?
The location within the Earth where the earthquake originates.
What is Shallow focus?
0-70 km deep, found along all plate boundreis.
What is Intermediate focus?
70-350 km deep, mostly occured in subduction zones along converging plate boundries.
A point on the Earth's surface located directly above the focus.
What is Epicenter location?
Rquires plotting the distance between the epicenter and a minimum of three seismograph stations.
What is Magnitude?
A measure of the energy released during an earthquake.
What is Richter scale?
A logarithmic scale for expressing the magnitude of an earthquake based on the motion or "swings" of a seismograph.
What is Intensity?
A measure of an earthquake's size by its effects on man and building.
What is Modified Mercali scale?
A scale used to measure earthquakes intensity and rages.
What is Earth's material?
Buildings built on soft sediments tend to be more susceptible to earthquake damage than buildings constructed on hard rock.
What is Building design?
Properly designed wood, reinforced concrete, and steel frame buildings tend to perform than unreinforced brink/adobe structure
What is Ground motion?
Ground vibration or movement in response to energy being released by an earthquake.
What is Fault Rupture?
With a large earthquake (about magnitude 6.5 and greater), the fault rupture can reach and displace the ground surface, forming a fault scarp (steep break in slope).
What is Aftershock?
Smaller earthquakes that follow the main earthqauke or event.
What is Landslide?
Slope failures triggered by earthqauke induced shaking.
What is Liquification?
Water-saturated sediment change from a solid to a liquid as a result of earthquke induced shaking.
What is Tsunami?
Large sea waves produced by earthquake related movement, can also be produced by factors of (e.g., landslides and volcanic activity)
What is Seiche?
Sloshing of water within an closed basin (e.g., lakes, reseviours, pools) due to earthquake induced shaking.
What is Ground lurching?
Cracking or lurching of the ground surface caused by ground shaking.
What is Fire?
A serious problem resulting from an earthquake (e.g., broken gas, water lines, and fallen power lines.)