Sentences with phrase «of smaller earthquakes»

The mathematical expression of the law at the seismic moment, proposed by Serra and Corral, meets all the conditions needed to determine both the probability of smaller earthquakes and of large ones, by adjusting itself to the most recent and extreme cases of Tohoku, in Japan (2011) and Sumatra, in Indonesia (2004); as well as to determine negligible probabilities for earthquakes of disproportionate magnitudes.

But plenty of smaller earthquakes, most not even felt by humans, occur across the world every day due to detonations, such as nuclear weapons testing or mining, or rising magma linked to volcanic activity.

It was the financial markets equivalent of a small earthquake: No major casualties in the end, but when the floor started shaking it sure was pretty scary.

Rather, most of the small earthquakes have been linked to injection wells, which dispose of huge quantities of water used to flush out oil and gas in extraction operations.

Instead, the proliferation of hundreds of small earthquakes in that part of the U.S. is thought to be caused primarily by massive amounts of wastewater injected back into the ground after oil and gas recovery.

Fracking — the process by which water, sand, and chemicals are pumped underground to force the oil out of rock formations — is suspected of contaminating nearby aquifers and wells, as well as causing dozens of small earthquakes near the drill sites.

There have been thousands of small earthquakes over the past week at Bardarbunga, which is Iceland's largest volcanic system and located under the ice cap of a glacier.

A second possible method — lowering an unstable flank slowly through a series of small earthquakes — would be much cheaper but fraught with geologic unknowns and potential dangers.

ROME — A project to drill deep into the heart of a «supervolcano» in southern Italy has finally received the green light, despite claims that the drilling would put the population of Naples at risk of small earthquakes or an explosion.

The glaciated mountain, which is Iceland's highest volcano, is teasing scientists by producing swarms of small earthquakes under its flanks.

By the way, these «earthquakes» are extremely small and hard to detect since they have less than 10,000 times the energy of the smallest earthquakes that can be felt by humans.

Enhanced geothermal systems (hot dry rock) can also increase the risk of small earthquakes.

Not exact matches

The team reports that the volcano has been stirring for 67 years, with two - year periods of unrest in the 1950s, 1970s, and 1980s giving rise to small earthquakes — a pattern that was also seen in the lead - up to the 1538 eruption.

A powerful 7.8 magnitude earthquake rocked the small country of Ecuador on April 16, 2016.

Additionally, in the wake of the destruction caused by Hurricanes Harvey, Irma and Maria, as well as the earthquakes in Mexico, the firm and Goldman Sachs Gives made grants exceeding $ 2 million to organizations providing immediate resources, short - term relief, long - term housing and small business reconstruction and recovery.

Earthquake central: A small tremor was recorded early Friday in the shale heartland of Oklahoma, one day after state regulators limited work because of seismic activity.

He is one of the earthquake survivors who received rice seeds distributed by Oxfam and our partner, Small Farmer Agricultural Cooperative Federation (SFACF).

Outside the village of Darbonne, Haiti, near the earthquake's epicenter, their small concrete - block tin - roof home, without running water or electricity, had collapsed.

Scientists say a small earthquake was recorded Saturday morning in Putnam County, just a few miles north of the Westchester County border.

And a recent joint report by the UK's Royal Society and Royal Academy of Engineering concluded that most of the known instances of groundwater contamination, such as in Pavillion, Wyoming, and the cases of fracking - related earthquakes in Texas were due to poor practice, and that the risk of accidents is small if fracking is properly managed.

So far, most of the earthquakes associated with injection have been small — things that might rattle the china cabinet.

Moreover, scientists suspect that the injection of used fracking fluid into deep disposal wells may have triggered dozens of recent small earthquakes in northeastern Ohio and north Texas.

Image courtesy of iStockphoto / kickers A magnitude 5.8 earthquake that shook buildings and sent people in New York, Philadelphia, Washington, D.C., and surrounding areas streaming outside into the summer weather on August 23 might seem like small shakes for residents of more quake - prone regions of the nation.

After comparing central U.S. earthquakes with tremors in geologically similar parts of the world — and noting that induced quakes, so far, tended to rupture either smaller faults or smaller sections of faults than West Coast quakes — they settled on an upper limit of magnitude 6, which can damage even well - built structures.

With the press of a button, the engineers could deliver small, precise earthquakes to the building — or bone - rattlingly big ones.

Although geologists can use seismic data from large earthquakes to see features deep in the earth, the shallow subsurface geology of the park has remained a mystery, because mapping it out would require capturing everyday miniature ground movement and seismic energy on a much smaller scale.

«It has been argued for decades that fault systems evolving over geological time may unify smaller fault segments, forming mature rupture zones with a potential for larger earthquake,» said Marco Bohnhoff, professor of geophysics at the German Research Center for Geosciences in Potsdam, Germany, who sought to clarify the seismic hazard potential from the NAFZ.

But the phenomenon has been brought to the fore by an extraordinary rise in small earthquakes across parts of the central United States.

Yet the recent north Texas earthquakes were so small they caused offsets of just a fraction of a centimeter.

The new study shows that the frequency and magnitude of large earthquakes in the densely populated regions close to mountain chains — such as the Alps, Apennines, Himalaya and Zagros — depend on the collision rate of the smaller tectonic plates.

The Gorkha earthquake relieved strain over a fairly small patch of the MHT fault.

The array listens for the echoes of seismic waves — generated by distant earthquakes or small explosions detonated nearby — as they bounce off subsurface structure.

«It had previously been believed that hydraulic fracturing couldn't trigger larger earthquakes because the fluid volumes were so small compared to that of a disposal well,» Atkinson explained.

The time history of quasi-static slip along the plate interface, based on small repeating earthquakes that were part of the migrating seismicity, suggests that two sequences involved slow - slip transients propagating toward the initial rupture point.

This stress build - up, and rupturing, was the root cause of the massive 1944 Tonankai earthquake and the smaller Off - Mie earthquake that struck almost the same area on April 1, 2016.

While these percentages sound small, Atkinson pointed out that thousands of hydraulic fracturing wells are being drilled every year in the WCSB, increasing the likelihood of earthquake activity.

To control the earthquake risk, drillers would have tried to keep the size of the fractures small and to maintain steady water flow rates.

Building on light - cloaking work, physicists took a small step toward the goal of shielding cities from earthquakes by deflecting incoming energy.

Research suggests that small quakes immediately raise the risk of a large quake by as much as a thousandfold, says Thomas Jordan, director of the Southern California Earthquake Center, though the probability is still only about 1 percent per day and falls rapidly with time.

So far, scientists believe that larger earthquakes are unlikely to occur following tremors or earthquakes below a Richter scale of 2 that are caused by small vibrations or slow fault movements such as those observed in the area of Parkfield along the San Andreas Fault in California, USA.

A nearby minor fault, capable of generating only a small earthquake, may be more dangerous to a structure than a distant major fault.

In an explosion as compared with an earthquake, the amplitudes of Rayleigh waves are smaller than those of the P waves.

The earthquake — estimated at magnitude 9.0 on the Richter scale — occurred in a total area much smaller than previous large earthquakes, such as the 8.8 Chilean earthquake last year, arguing that the slippage was much greater for the Japan quake, one of the four most powerful earthquakes on record.

«We want to stop fluid injection from triggering even small earthquakes in Texas so that the probability of larger earthquakes is significantly reduced.»

While none of these small - to - moderate earthquakes has yet caused significant property damage or injury, they represent an increased probability of larger earthquakes.

Although such accumulated strain may be released in a series of smaller, less hazardous rumbles, Floyd says that given the historical pattern of major quakes along the North Anatolian Fault, it would be reasonable to expect a large earthquake off the coast of Istanbul within the next few decades.

Further, it alerts scientists that earthquake clustering may not only characterise shallow faulting and smaller - sized earthquakes with magnitudes lower than M7 but it is a property of large subduction earthquakes.

Smaller faults also exist within plates, and when pressure builds up, they, too, can suddenly give way, causing an intraplate earthquake like the 2011 one centered in Mineral, Va., or the famous New Madrid quakes of 1811 in the Louisiana Territory.

In contrast, similar earthquake swarms that occur near the surface can take hours or days to finish, and would likely include a large number of small aftershocks.

The preliminary results from the Cascadia Initiative include a report of previously undetected, small earthquakes offshore, and seismic imaging that reveals new offshore structures at the subduction zone.