Geophysics
Top most mechanical layer that encompasses the crust and solid portion of the upper mantle.
What is the Lithosphere?
The square root of the quantity of the spring constant divided by the mass multiplied by the mass multiplied by the maximum displacement of motion.
When a wave bends around an obstacle caused by physical obstacle, not by crossing a discontinuity.
What is Diffraction?
Exhibit particle motion that is circular when compared to the direction of wave travel.
What are LR-Wave(Rayleigh/ Elliptical Retrograde)
When two plates come together comprised of subduction and collision zones.
Commonly called the Moho the lower boundary of the crust is defined by sharp seismic velocity discontinuity.
What is Mohorovicic Discontinuity?
Wave propagation in which the oscillator motion is in the same direction as or parallel to the wave velocity.
When waves have displacement in opposite directions.
What is destructive interference?
Method that involves the detection of acoustic waves through the oceans sound fixing and ranging(SOFAR) channel.
When plates are sliding past one another. At these boundaries crust is neither created nor destroyed.
What is Transform Boundaries.
Extends from 5155 km to 6370km and behaves as an elastic ball of nearly solid iron.
What is the Inner Core?
Daily Double
Wave propagation in which the oscillation is perpendicular to the waves direction of propagation.
What is Transcerse(shear) wave?
The direction of an object when observed the frequency will be as higher than the frequency of by the source according to the Doppler effect.
What is moving toward observer?
Involves the detection of acoustic waves that are less than 20Hz which may be generated through the air by earthquakes.
What is Infrasound?
Caused by compressional stress caused by rocks being pushed together. The strata have been displaced. upward with respect to their original position.
What is Reverse Thrust Faults?
semi liquid layer below the lithosphere.
What is the Asthenosphere?
When two waves interact to resultant waves is the algebraic sum of their displacements.
What is the Principle of Superposition?
Waves above 20kHz that can be generated by high frequency vibrations in crystals.Cannot be heard by humans.
What is the Ultrasonic region?
The device used for vertical and horizontal motion in three dimensions.
What is 3- component Seismometer?
The counteraction of the earths crust to maintain equilibrium and offset the accumulating stress of the rock.
What is Isostasy?
5 compositional layers of the earth.
What is Crust, Upper Mantle, Lower Mantle, Outer Core and Inner Core?
Distance of the object in SHM from its equilibrium position.
What is Displacement?
The region with sound waves with frequency between 20Hz and 20kHz.
What is audible region?
Ares of compression ad rarefaction can be related to ares of high pressure and low pressure. Can travel through ant medium.
The major tectonic plates.
What are African, North American, South American, Eurasian, Australian, Antarctic and Pacific.