Directions:
... As you may recall, we use travel time graphs to show how long it takes each type of seismic wave to travel a distance, measured on Earth’s surface. The difference between the S-wave arrival time and the P-wave arrival time corresponds to the distance of the seismograph from the focus of the earthqua ...
... As you may recall, we use travel time graphs to show how long it takes each type of seismic wave to travel a distance, measured on Earth’s surface. The difference between the S-wave arrival time and the P-wave arrival time corresponds to the distance of the seismograph from the focus of the earthqua ...
Physical Processes WG2b
... • Scientists cannot predict when volcanoes will erupt. • People live near volcanoes because volcanic ash is extremely fertile and good for farming. ...
... • Scientists cannot predict when volcanoes will erupt. • People live near volcanoes because volcanic ash is extremely fertile and good for farming. ...
Movement in Earth Notes
... – Magma collects in a chamber under the surface – Pressure builds up as the chamber fills – Pressure gets so great magma rises to the hole and comes out as lava ...
... – Magma collects in a chamber under the surface – Pressure builds up as the chamber fills – Pressure gets so great magma rises to the hole and comes out as lava ...
Plate motion, earthquakes, and volcanoes
... Strong waves, but second to the surface waves Slower that p-waves, but faster than surface waves Fairly destructive, definitely more so than the p-waves S-waves cannot travel though air or liquids **Can these waves travel through the outer core?*** ______ ...
... Strong waves, but second to the surface waves Slower that p-waves, but faster than surface waves Fairly destructive, definitely more so than the p-waves S-waves cannot travel though air or liquids **Can these waves travel through the outer core?*** ______ ...
STUDY GUIDE Forces that Shape Earth
... Convergent boundary: in plate tectonics, where two tectonic plates move towards one another and collide Divergent boundary: in plate tectonics, where two tectonic plates are moving away from each other Transform boundary: a fault that is moving in a horizontal direction Earthquake: a sudden and viol ...
... Convergent boundary: in plate tectonics, where two tectonic plates move towards one another and collide Divergent boundary: in plate tectonics, where two tectonic plates are moving away from each other Transform boundary: a fault that is moving in a horizontal direction Earthquake: a sudden and viol ...
natural disasters
... The earth is broken into giant pieces of rock known as plates. These plates form the earth's crust. The plates are always moving slowly and will sometimes bump into each other. Earthquakes may occur when the plates collide. They may also occur far away from these plates at cracks in the earth's surf ...
... The earth is broken into giant pieces of rock known as plates. These plates form the earth's crust. The plates are always moving slowly and will sometimes bump into each other. Earthquakes may occur when the plates collide. They may also occur far away from these plates at cracks in the earth's surf ...
Earthquakes and Volcanoes
... Earthquakes occur along breaks in the earth surface, these breaks are called___________. List and Describe the 3 types. 2. The _________is the beginning part of an earthquake & the ____________is the point on the surface of the earth directly above the focus. 3. ________ ________ are the vibrations ...
... Earthquakes occur along breaks in the earth surface, these breaks are called___________. List and Describe the 3 types. 2. The _________is the beginning part of an earthquake & the ____________is the point on the surface of the earth directly above the focus. 3. ________ ________ are the vibrations ...
Earthquakes and Volcanoes
... Earthquakes occur along breaks in the earth surface, these breaks are called___________. List and Describe the 3 types. 2. The _________is the beginning part of an earthquake & the ____________is the point on the surface of the earth directly above the focus. 3. ________ ________ are the vibrations ...
... Earthquakes occur along breaks in the earth surface, these breaks are called___________. List and Describe the 3 types. 2. The _________is the beginning part of an earthquake & the ____________is the point on the surface of the earth directly above the focus. 3. ________ ________ are the vibrations ...
Obj. 2.1.2 Volcanoes and Earthquakes
... c. the place on the surface directly above the focus d. a spot halfway between the focus and the surface ____2.Violent shaking from an earthquake can cause soil and rock on slopes to fail and cause a ____. a. landslide c. sinkhole b. fault d. tsunami ____3.Which one of the following statements is tr ...
... c. the place on the surface directly above the focus d. a spot halfway between the focus and the surface ____2.Violent shaking from an earthquake can cause soil and rock on slopes to fail and cause a ____. a. landslide c. sinkhole b. fault d. tsunami ____3.Which one of the following statements is tr ...
Constructive and Destructive Forces
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
Constructive and Destructive Forces
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
Constructive and Destructive Forces
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
... • More than buildings collapse when an earthquake hits. The land itself is totally changed. You can see scars across the landscape. Those scars appear when one block of land has moved compared to another. Roads often change their placement. They either become uneven or just crack. Streams can also c ...
Convergent Boundaries Places where plates crash or
... All that folding and bending makes rock in both plates break and slip, causing earthquakes. As the edge of the oceanic plate digs into Earth's hot interior, some of the rock in it melts. The melted rock rises up through the continental plate, causing more earthquakes on its way up, and can cause vol ...
... All that folding and bending makes rock in both plates break and slip, causing earthquakes. As the edge of the oceanic plate digs into Earth's hot interior, some of the rock in it melts. The melted rock rises up through the continental plate, causing more earthquakes on its way up, and can cause vol ...
Geography Plate Tectonics Earthquakes Volcanoes
... As the plates grind or slip past each other at a fault, the earth shakes or trembles. ...
... As the plates grind or slip past each other at a fault, the earth shakes or trembles. ...
PLATE TECTONICS
... 2. Which statement is true about the Earth’s crust? A. Continental rocks are heavier than ocean ...
... 2. Which statement is true about the Earth’s crust? A. Continental rocks are heavier than ocean ...
Advances in Earthquake Precursor Studies in Taiwan
... Taiwan started in 1979. Under this project, spatial and temporal changes in microearthquake activities over all Taiwan were analyzed using the data obtained by the Taiwan Telemetered Seismographic Network (TTSN). Meanwhile, repeated measurements of gravity, geomagnetic total intensity, crustal defor ...
... Taiwan started in 1979. Under this project, spatial and temporal changes in microearthquake activities over all Taiwan were analyzed using the data obtained by the Taiwan Telemetered Seismographic Network (TTSN). Meanwhile, repeated measurements of gravity, geomagnetic total intensity, crustal defor ...
What Causes Earthquakes?
... Long time ago, a large collection of material masses coalesced to form the Earth. Large amount of heat was generated by this fusion, and slowly as the Earth cooled down, the heavier and denser materials sank to the center and the lighter ones rose to the top. The differentiated Earth consists of the ...
... Long time ago, a large collection of material masses coalesced to form the Earth. Large amount of heat was generated by this fusion, and slowly as the Earth cooled down, the heavier and denser materials sank to the center and the lighter ones rose to the top. The differentiated Earth consists of the ...
Earthquakes - Distribution Access
... deep underground in the Earth. Movements in the mantle, or molten rock layer of the Earth, put pressure on the surface or crust, causing it to bend, buckle, stretch and even break. Over the course of millions of years, the Earth’s crust has broken into large pieces called plates that are still in mo ...
... deep underground in the Earth. Movements in the mantle, or molten rock layer of the Earth, put pressure on the surface or crust, causing it to bend, buckle, stretch and even break. Over the course of millions of years, the Earth’s crust has broken into large pieces called plates that are still in mo ...
Name Date LabWrite for Middle School
... similar to the way an earthworm travels in a push-pull linear motion. Because they travel in a linear motion, there is little displacement of Earth's materials. P-waves are the least damaging of all seismic waves. Linear motion The S waves, also called secondary or sheer waves is slower than the P w ...
... similar to the way an earthworm travels in a push-pull linear motion. Because they travel in a linear motion, there is little displacement of Earth's materials. P-waves are the least damaging of all seismic waves. Linear motion The S waves, also called secondary or sheer waves is slower than the P w ...
Volcanoes and earthquake - SIGNAL HILL SECONDARY
... a crater, vent or fissure on to the earth's surface to form new deposits. ...
... a crater, vent or fissure on to the earth's surface to form new deposits. ...
Plate Boundaries and Earthquake Science
... o how do we know what is below our feet? we have only drilled down several km’s never through the crust 5km thick (ocean) and 35km thick (continents) in contrast, the Earth has a radius of 6,370km o examining the seismic waves as they pass through the Earth waves change speeds when they pa ...
... o how do we know what is below our feet? we have only drilled down several km’s never through the crust 5km thick (ocean) and 35km thick (continents) in contrast, the Earth has a radius of 6,370km o examining the seismic waves as they pass through the Earth waves change speeds when they pa ...
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the perceptible shaking of the surface of the Earth, which can be violent enough to destroy major buildings and kill thousands of people. The severity of the shaking can range from barely felt to violent enough to toss people around. Earthquakes have destroyed whole cities. They result from the sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter magnitude scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2014), and it was the largest Japanese earthquake since records began. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.