But what about more violent forces, such as
those produced by earthquakes?
The team spent more than a year collecting data from phones placed on a «shake table,» a device that simulates the ground motions
produced by an earthquake, and comparing them with data from everyday movements.
Seismic waves are waves of energy
produced by earthquakes, explosions and volcanic eruptions, which can travel long distances below Earth's surface.
Intensity measures the strength of shaking
produced by the earthquake at a certain location.
Scientists rely on the public's reporting of ground shaking to characterize the intensity of ground motion
produced by an earthquake.
Now, computer simulations by Stanford scientists reveal that sound waves in the ocean
produced by the earthquake probably reached land tens of minutes before the tsunami.
To create this big - picture view, University of Southern California geophysicist Thorsten Becker used seismic tomography, which tracks waves
produced by earthquakes as they travel around and through the earth.
Because we can not sample the deep Earth, we must deduce its composition either by looking at the clues hidden in igneous and metamorphic rocks, or by examining proxies for composition and structure such as the three - dimensional variation of the velocity of seismic waves
produced by earthquakes and sampled by networks of seismometers on the surface.
seismic wave An energy wave traveling through the ground
produced by an earthquake or some other means.
My Teacher Caused an Earthquake An introduction to the topic of seismic waves
produced by earthquakes — using cardboard and an old bowling ball.
They are
produced by earthquakes and other seismic disturbances.
Not exact matches
The Oklahoma Geological Survey has determined that the majority of recent
earthquakes in central and north - central Oklahoma are very likely triggered
by the injection of
produced water in disposal wells.»
«The OGS considers it very likely that the majority of recent
earthquakes, particularly those in central and north - central Oklahoma, are triggered
by the injection of
produced water in disposal wells,» it wrote in a statement.
Most Oklahoma
earthquakes since 2009 are thought to have been triggered
by wastewater
produced by oil and gas drilling that has been injected back into the ground.
«We demonstrated that consecutively triggered
earthquakes can enhance the amount of energy
produced by the ruptures, exceeding the design specifications expected for buildings in moderate seismic hazard zones,» said Tramelli, whose analysis suggests that the shaking from multiple magnitude 5.0
earthquakes would be significantly greater than from an individual magnitude 5.0 event.
The drilling itself does not cause
earthquakes, but the steam removal and water return can do so,
by producing new instability along fault or fracture lines.
The recent
earthquake swarm, beginning on March 24 and climaxed
by a 4.9 magnitude tremor on Saturday, has
produced no reports of injuries or severe damage but has rattled nerves in a region where Idaho's most powerful known quake, measured at 6.9, killed two children in 1983.
An intraplate fault like this generally
produces earthquakes much less frequently than those at the boundaries of tectonic plates, like California's San Andreas Fault, and tends to be less well understood
by geologists.
For the purpose of this study, a team of geologists from the Nanjing University, China, and the University of Illinois studied the echoes generated
by seismic waves
produced during
earthquakes to scan below the surface of Earth, much like an ultrasound is used to see inside patients.
In work that offers insight into the magnitude of the hazards posed
by earthquake faults in general, seismologists have developed a model to determine the size of an
earthquake that could be triggered
by the underground injection of fluids
produced as a
by - product of hydraulic fracturing.
So he chose a specific type of deep seismic wave called an SKS wave that's only
produced by the biggest
earthquakes.
The sides of abyssal hills are fault escarpments (or scarps) created
by vertical uplift of the seafloor during many events of fault slippage that
produce frequent
earthquakes.
The glaciated mountain, which is Iceland's highest volcano, is teasing scientists
by producing swarms of small
earthquakes under its flanks.
Dixon added that the 2004 Indian Ocean tsunami, generated
by an
earthquake on a similar fault to the one that
produced Japan's great
earthquake, should have been a prod to Japanese officials and utilities to reexamine their plans and systems:
The simulation was
produced by the same National Oceanic and Atmospheric Administration facility in Seattle (NOAA / PMEL / Center for Tsunami Research) that raced to calculate where the tsunami from the great Indian Ocean
earthquake of 2004 would exact its worst toll.
Recently, researchers at Columbia University's Lamont - Doherty Earth Observatory analyzed recordings of the underwater sound
produced by the magnitude 9.3
earthquake.
According to
Earthquake Model for Canada1, a report produced by AIR Worldwide for the Insurance Bureau of Canada, the risk of a major earthquake is highest in Vancouver, Victoria, Montréal, Ottawa and Qu
Earthquake Model for Canada1, a report
produced by AIR Worldwide for the Insurance Bureau of Canada, the risk of a major
earthquake is highest in Vancouver, Victoria, Montréal, Ottawa and Qu
earthquake is highest in Vancouver, Victoria, Montréal, Ottawa and Québec City.