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Lecture 9 Earthquakes
Lecture 9 Earthquakes

... 1. Seismic velocities across the _________ - mantle boundary increase dramatically. The difference is referred to as the Mohorovicic Discontinuity. 2. Deeper than about 700 kilometers, higher temperatures and pressures cause stressed rocks to deform ______________, rather than rupture or shift. 3. R ...
Slide 1
Slide 1

... depends on magnitude & type of rock/soil ...
Exp 05 Sea Floor Spreading
Exp 05 Sea Floor Spreading

... 2. Prepare the computer for data collection by opening the file “05 Sea Floor Spreading” in the Earth Science with Computers folder. 3. Zero the Magnetic Field Sensor. This step removes the effects of the Earth’s magnetic field and any local magnetism from the results. a. Remove anything magnetic fr ...
Gravity and the Hypothesis of Convection
Gravity and the Hypothesis of Convection

... It is difficult to say wh at the radio~activity is in the deeper layers. because there is no common opinion about their constitution. but it appears unlikely that there would be a reversion of the heat generation in stlch a way that the above effect would be compensated. For getting a better view on ...
ES Spring Exam Study
ES Spring Exam Study

... 53. Ch 18- saltation 54. What are the effects of wind erosion? 55. How do waves cause erosion? 56. What determines the composition of beaches? 57. Why are barrier islands important? 58. Ch 19- How do sediments close to shore compare to deep ocean sediments? 59. Ch 20- not tested 60. Ch 21- Coriolis ...
Table of Contents - Mr. Tobin`s Earth Science Class
Table of Contents - Mr. Tobin`s Earth Science Class

... push rocks in direction in which wave is traveling. Secondary Wave: S-Waves. Slower than p-waves. Rocks move at right angles in relation to direction of waves. Both P and S waves pass through Earth’s interior. ...
1. The hotspot‐melting‐through‐lithosphere process forms lines of
1. The hotspot‐melting‐through‐lithosphere process forms lines of

... 30. The __________ is measured in cross‐sectional view as the angle of inclination from horizontal of a  tilted rock layer, and _______ is viewed in map view as the compass bearing of the rock layer where it  intersects a horizontal plane.  a. dip; dip  b. dip; strike  c. strike; dip            d.  ...
What Are Earthquakes?
What Are Earthquakes?

... deformed rock to its original shape is called elastic rebound • Elastic rebound occurs when the stress on a rock becomes so great, that it breaks. ...
Chapter 8 Earthquakes and Earth’s Interior
Chapter 8 Earthquakes and Earth’s Interior

... Seismogram  a time record of ground motion during an earthquake produced by a seismograph Shows all three types of waves Stronger the earthquake = larger waves P waves first, followed by S waves, and finally surface waves ...
teacher name: room: week beginning
teacher name: room: week beginning

... TEACHER NAME: Buck Standards Alignment COLUMBUS DAY M O N D A Y ...
Ch. 22.5 EQ study guide
Ch. 22.5 EQ study guide

... collapsing structures •Damage to buildings & structures (collapse) •Underground water and gas pipes break – floods & fires ...
Earthquakes - Pitt County Schools
Earthquakes - Pitt County Schools

... not been ___________________.  ________________-Range Forecasts • Scientists don’t yet understand enough about how and where __________________ will occur to make ___________________ long-term _____________________. • A seismic ____________ is an area along a ___________ where there has not been an ...
Notes on Earthquakes and Earth`s interior - earth
Notes on Earthquakes and Earth`s interior - earth

... 1. The Crust- is a solid layer, which consists of continental and oceanic crust. This layer is relatively thin compared to the other layers. a) Continental crust is made of Granite, which is a low-density igneous rock and has an average thickness of 20-40 km. b) Oceanic crust is made of Basalt, whic ...
Mean–field dynamo theory: early ideas and today`s problems
Mean–field dynamo theory: early ideas and today`s problems

... the acceleration of electrons, the “betatron”, which worked successfully for the first time in 1935. Devices of that kind were later used for several purposes in medicine. An important achievement in this context was his discovery of a configuration of the magnetic field in the betatron which ensure ...
File
File

... convection currents move in the liquid. When the convection currents flow in the asthenosphere they also move the crust. The crust gets a free ride with these currents, like the cork in this illustration. ...
AICE Environmental Management GIZMOS Class Code
AICE Environmental Management GIZMOS Class Code

... Both P and S waves are known as body waves because they travel through solid rock below Earth’s surface. When these waves reach the surface, their effects combine in surface waves, which shake the ground back and forth, up and down, and side to side. Surface waves account for the largest wiggles on ...
Earth Science Chapter 5 Earthquakes
Earth Science Chapter 5 Earthquakes

... A shaking and trembling that results from the sudden movement of part of the Earth’s crust. Similar to ripples from a pebble in a pond Usually occur along a fault More than 1 million per year on the planet Entire fault doesn’t all move at the same time. Energy is released at different places at anyo ...
Chapter 2 PPT
Chapter 2 PPT

...  Accurate measurements for small, nearby earthquakes not large, distant earthquakes ...
How Do Stress Forces Affect Rock?
How Do Stress Forces Affect Rock?

...  Accurate measurements for small, nearby earthquakes not large, distant earthquakes ...
phy226 tutorial kit - Covenant University
phy226 tutorial kit - Covenant University

... up so as to conserve angular momentum and centrifugal force caused concentric rings of matter to be thrown off, which then condensed into planets. A major objection to this hypothesis is that the mass of materials in each ring would be too small to provide the gravitational attraction needed to caus ...
The inside of the Earth
The inside of the Earth

... • Deeper rock is denser and stiffer due to increasing pressure, thus higher velocity • Phase changes, 5% jumps in vel. & den. – Changes in molecular arrangement – At depths of 410 and 660 km ...
What are Earthquakes?
What are Earthquakes?

... Compress and expand like an accordion Move through solids, liquids, and gases ...
Effect of melt content and the melt texture on sound wave velocity
Effect of melt content and the melt texture on sound wave velocity

... The geophysical observations of elevated electrical conductivity (EC) and reduced seismic wave velocity (SWV) have long been discussed in conjunctions with partial melting in the Earth’s asthenosphere. Alternative mechanisms based on solid state processes, such as anelastic relaxation and hydrogen d ...
Plate tectonics NB Name
Plate tectonics NB Name

... Base your answer/s to the following question/s on the diagram on the left, which shows a cutaway view of Earth in which the interior layers are visible. The paths of the earthquake/seismic waves generated at point X are also shown. A, B, C, and D are locations of seismic stations on Earth’s surface, ...
Simultaneous observation of the electron acceleration and ion deceleration
Simultaneous observation of the electron acceleration and ion deceleration

... 0 deg. is the parallel direction toward the Moon. The accelerated electrons were heated and had mostly parallel velocity toward the Moon surface. The deceleration of the ions was observed simultaneously with the electron acceleration and the deceleration was clearly observed for both protons and alp ...
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Ionospheric dynamo region

In the height region between about 85 and 200 km altitude on Earth, the ionospheric plasma is electrically conducting. Atmospheric tidal winds due to differential solar heating or due to gravitational lunar forcing move the ionospheric plasma against the geomagnetic field lines thus generating electric fields and currents just like a dynamo coil moving against magnetic field lines. That region is therefore called ionospheric dynamo region. The magnetic manifestation of these electric currents on the ground can be observed during magnetospheric quiet conditions. They are called Sq-variations (S=solar; q=quiet) and L-variations (L=lunar) of the geomagnetic field.Additional electric currents are generated by the varying magnetospheric electric convection field. These are the DP1-currents (the auroral electrojets) and the polar DP2-currents. Finally, a polar-ring current has been derived from the observations which depends on the polarity of the interplanetary magnetic field. These geomagnetic variations belong to the so-called external part of the geomagnetic field. Their amplitudes reach at most about 1% of the main internal geomagnetic field Bo.
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