Sentences with phrase «produced by earthquakes»

They are produced by earthquakes and other seismic disturbances.

My Teacher Caused an Earthquake An introduction to the topic of seismic waves produced by earthquakes — using cardboard and an old bowling ball.

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.

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.

Seismic waves are waves of energy produced by earthquakes, explosions and volcanic eruptions, which can travel long distances below Earth's surface.

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.

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.

seismic wave An energy wave traveling through the ground produced by an earthquake or some other means.

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 QuEarthquake 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 Quearthquake is highest in Vancouver, Victoria, Montréal, Ottawa and Québec City.