1. Distance from the epicenter/focus
2. Duration of Shaking
3. Magnitude
4. Ground material
These all lead to the types of earthquakes (Subduction Zone EQs, Deep EQs and Shallow Crustal EQs), which leads to plate tectonics, which then leads to plate boundaries.
Subduction Zone EQs
Deep EQs
Shallow Crustal Faults
Subduction Earthquakes - Juan de Fuca plate is sliding underneath North American plate
-friction - What happens with the subuction zone breaks?
-As the interface area moves, the strain in the overlying plate is released. Areas of the overlying plate are uplifted and other parts subside. We call this rebound (land can either go up or down).
Summary:
-Where? at the interface of the Juan de Fuca and North American plate
-Why? locking-bulging, ^^^ slipping-rebounding mechanism
-How frequent? every 300-500 years
-How strong? 8.5-9M
-Area potentially effects? 1-4 minutes
Deep earthquakes in subducting slab (i.e. Nisqually earthquake)
-Hot on the outside, ice cold on the inside (i.e. deep fried ice cream).
-center of plate is still cold (outer is hot), earthquakes are in the center due to coldness which leads leads to brittle breakage.
Summary Deep earthquakes
-Where? at depths of 35-60 km in the Juan de Fuca subducting plate
-Why? Phase changes in the subducting slab ^^^
-How strong? 6-7.5 M (moderate)
-How frequent? one ever 30 years avr.
-Shaking effects? 14-30 seconds
-Area affected? localized in area above subducting slab
-potential damage? significant to extensive
(i.e. Seattle Fault, Tacoma Fault and Urban Earthquakes - many local faults in the Puget Sound Region)
-Where? Shallow in the North American plate (includes the Puget Sound Region)
-Why? Regional compressional stress applied on pre-existing crustal faults
-How strong? up to 7.5M
-How frequent? uncertain...
-Damage? localized but extensive
broken glass,
cut electrical cords,
hazards fires, and other dangers
Tttc
It is a seismomiter.
So far the amount of people that have died in the Japanese earthquake is 10,000 people.
Two factors that determine the amount of solar energy an area receives are the amount of atmosphere it has to travel through and the tilt of the Earth. The more atmosphere the solar energy goes through the less energy there will be when it hits the surface. Also, the tilt of the Earth determines the amount of solar energy because if you are tilted towards the sun you are a little bit closer, so the energy doesn't have to go through as much atmosphere as the side of the Earth tilted away from the sun. Hope this helps!
Because magnitude is a measurement of the amount of energy released in an earthquake and this value will remain constant once the earthquake has finished. However the estimates seismologists make of this value may change as they gain more information about the earthquake...
the magnitude and the lacation of the epicenter.
The amount of structural and geological damage done by an earthquake in a specific location determines an earthquake's intensity on the Mercalli scale.
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The Modified Mercalli Intensity scale is used in the US to determine the severity of earthquake effects. Intensity ratings are in Roman numerals, I - meaning no people felt movement, all the way up to XII - where almost everything is destroyed.The amount of structural and geological damage done by an earthquake in a specific location determines an earthquake's intensity on the Mercalli scale. :)
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The amplitude of seismic waves from an earthquake is is measured by a seismometer. From this an estimate can be made of the amount of energy released by an earthquake (this is known as magnitude). The magnitude of an earthquake is controlled by the amount of energy stored within the deformed rocks of the crust. This is in turn a function of the elastic moduli of the crust, the cross sectional area of the fault rupture zone and the amplitude of the displacement on the fault.
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thrust and wing size determine the amount of lift achieved by an air plane.
The factors which affect soil pH levels are the amount of rainfall, the amount of plants and the number of soil organisms.
The Modified Mercalli Intensity scale is used in the US to determine the severity of earthquake effects. Intensity ratings are in Roman numerals, I - meaning no people felt movement, all the way up to XII - where almost everything is destroyed.The amount of structural and geological damage done by an earthquake in a specific location determines an earthquake's intensity on the Mercalli scale. :)
the stars amount of mass