They slow down
the seismic waves caused by earthquakes and may be the culprit for deep mantle plumes, which can lead to volcanic hotspots like those that created Yellowstone National Park or the Hawai'ian Islands.
Although this region is far too deep for researchers to ever observe directly, instruments that can measure the propagation of
seismic waves caused by earthquakes allow them to visualize changes in Earth's interior structure; similar to how ultrasound measurements let medical professionals look inside of our bodies.
Analysis of
the seismic waves caused by last week's blast put the yield of the warhead tested at between 50 and 100 kilotons.
Seismic waves cause perceptible ground motion if they are strong enough.
Not exact matches
In addition to the
waves that distort Earth's surface and
cause so much destruction, earthquakes spawn two other types of
seismic energy that ricochet through the body of the entire planet.
In LIGO's control room, monitors display
seismic activity
caused by the steady motion of ocean
waves (left) and the nearby logging operation (right).
Earthquake shaking is
caused by a mixture of
seismic waves moving through the ground at different frequencies.
The researchers suspect that
seismic waves shake loose a cascade of gas bubbles within chambers of molten rock,
causing magma to burst like a victor's magnum of champagne.
A six - year study of
seismic activity along the San Andreas Fault found that the 2004 Parkfield earthquake
caused breakage and microcracking in shallow rock layers that changed the speed at which
seismic waves moved through the area, making it more vulnerable to tremors for more than three years afterward.
When an earthquake hits a town, the destruction is
caused by
seismic waves moving through the Earth.
The mineral has a unique layered structure that
causes seismic waves to change velocity depending on their direction of travel — just as in the D» layer.
In a typical tremor, opposite sides of the fault rocket past each other in a matter of seconds — quickly enough to create the
seismic waves that
cause the ground to rumble and shake.
Seismic reflection survey: Causing an artificial earthquake with air guns or similar, receiving the seismic waves that have reflected or refracted below ground, and estimating the subsurface str
Seismic reflection survey:
Causing an artificial earthquake with air guns or similar, receiving the
seismic waves that have reflected or refracted below ground, and estimating the subsurface str
seismic waves that have reflected or refracted below ground, and estimating the subsurface structure.
Seismic stations detect the energy from the compressional P -
wave first, followed by the shear and surface
waves, which
cause the intense shaking and most damage.
As the magma chamber fills up, it
causes an increase in pressure, which leads to cracks closing in the surrounding rock and producing faster
seismic waves — and vice versa.
When the failure at the fault plane results in a violent displacement of the Earth's crust, the elastic strain energy is released and
seismic waves are radiated, thus
causing an earthquake.
Most earthquake damage results from the shaking
caused by
seismic waves passing beneath buildings, roads, and other structures.
«The devastation
caused by an earthquake of magnitude 6.4, can only be attributed to inapropriate building design or the reaction of the ground to the
seismic waves.
My Teacher
Caused an Earthquake An introduction to the topic of
seismic waves produced by earthquakes — using cardboard and an old bowling ball.
These oscillations are
waves very much like
seismic waves in the Earth [
caused by earthquakes] and just as
seismic waves can be used to probe the interior of the Earth, they can be used to probe the solar interior.