Sentences with phrase «magnitude quakes of»

Not exact matches

A magnitude - 7.9 quake has struck in the Gulf of Alaska, prompting tsunami warnings in Alaska and British Columbia.

Elsewhere on the Ring of Fire, a magnitude - 6.1 quake struck Indonesia and a volcano erupted in Japan.

The quake's epicenter was 175 miles east of Kamaishi, and not far from the 9.0 - magnitude blast that sent tsunami waves racing toward Fukushima in 2011.

The 8.9 magnitude quake struck at a depth of six miles about 80 miles off the eastern coast, according to Japan's meteorological agency.

Entergy insists Indian Point's reactors can easily withstand the sort of low - magnitude quakes that occur in the Northeast, which are nothing compared to the 8.9 monster that ravaged Northern Japan, causing a massive tsunami.

He pointed to induced quakes of magnitude 4 or larger in the past year in Texas, Oklahoma, Arkansas, Colorado, New Mexico, and Ohio, but said much of this happened too late for the research council to include in its study.»

But seismologists didn't have a sense of the quake's true magnitude for hours — and by that time, the immense wave had already inundated many areas (shown).

The signals generated by the magnitude - 9.1 quake that struck Japan were barely one - billionth g, the amount of Earth's gravitational field at sea level, but they traveled at the speed of light and were detected at seismometers hundreds of kilometers away, the researchers report today in Science.

The quake, estimated to have been at least magnitude 5.9, took no lives but damaged hundreds of buildings.

Now, researchers have come up with a way to more quickly gauge a big quake's magnitude and thus provide faster, more accurate tsunami warnings: by measuring the miniscule changes in Earth's gravitational field that are generated when massive slabs of the planet's crust shift by dozens of meters over the course of a few minutes.

A magnitude 4.7 foreshock preceded the quake by about 20 hours, and dozens of aftershocks were detected as well.

Magnitude 5 tremors, such as the quake that hit the town of Itacarambi in Minas Gerais in 2007, cause damage and occur once every 50 years, according to the researchers.

The epicentre of the magnitude 7.3 quake was to the east of the more powerful 7.8 magnitude earthquake on 25 April that killed more than 8000 people.

(Once the quake had occurred, statistical forecasting based on the size of the main shock did anticipate the possibility of its largest aftershock: a magnitude - 6.3 quake in February that heavily damaged older structures in Christchurch.)

Drawing on a centuries - long history of quakes of magnitude 7 to 8 rupturing various parts of the fault, members of the official Earthquake Research Committee had divided the offshore fault into six segments, each roughly 150 kilometers long, that they expected to rupture again.

By the time the 2004 magnitude - 6.0 Parkfield earthquake — the most closely monitored quake of all time — struck the central San Andreas fault without so much as a hint of a precursor (Science, 8 October 2004, p. 206), most researchers had abandoned attempts at precise prediction.

According to the USGS, the chances of a quake of magnitude 6 or higher within the next half - century are between 25 and 40 percent.

A map of the New Madrid Seismic Zone shows quakes greater than magnitude 2.5.

But in 2001, a huge burst of pressure was released through Jurassic - era fault lines near the center of the Indian plate, triggering a magnitude 7.7 quake that took 20,000 lives.

There would be other surprises on little - known faults: the 1992 magnitude - 7.3 Landers quake off the southern San Andreas (1 killed, $ 92 million in damage); the 1994 magnitude - 6.7 Northridge earthquake on a previously unknown, buried fault (60 killed, $ 20 billion in damage); and the 1999 Hector Mine quake, magnitude 7.1, in the remoteness of the Mojave Desert.

The magnitude - 6.2 quake was not preceded by even one warning tremor, says Warner Marzocchi, head of the National Institute of Geophysics and Volcanology in Rome.

In California not too long ago, a magnitude 4.8 quake struck near the southern San Andreas, the biggest so close to the fault in the history of seismic recording.

In 2013 the state recorded 109 quakes of magnitude 3 and greater.

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.

A recent government study estimated that $ 955 billion worth of damage and 11,000 deaths could result from a magnitude 7.3 earthquake directly under the northern part of Tokyo Bay — a monster quake many seismologists believe is long overdue.

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.

«But we can't rule out quakes of magnitude 7 and above,» says Mark Petersen, chief of the National Seismic Hazard Mapping Project.

Combining the 19th - century records of such effects with modern earthquake models helped Beauducel and Feuillet pin down both the quake's magnitude and the location of the fault rupture, the spot where the subduction zone tore apart.

NEW ZEALAND / / / EARTHQUAKE With an epicenter 6 miles from downtown, the Christchurch quake in February took 181 lives and caused $ 12 billion in damages despite having a magnitude of just 6.3.

Two other segments of the Ring of Fire ruptured this way — Chile in 1960 at magnitude 9.5, the largest quake ever recorded on Earth, and Alaska's horrible Good Friday earthquake of 1964, at 9.2 the strongest jolt ever to hit the continent of North America.

Quakes that are confined to the uppermost region of the Juan de Fuca plate — the crust — have an upper magnitude of about 7, while quakes extending to the mantle level below the crust could have magnitudes as high as 8 on the Richter scale — 30 times more energy than a magnitude 7 Quakes that are confined to the uppermost region of the Juan de Fuca plate — the crust — have an upper magnitude of about 7, while quakes extending to the mantle level below the crust could have magnitudes as high as 8 on the Richter scale — 30 times more energy than a magnitude 7 quakes extending to the mantle level below the crust could have magnitudes as high as 8 on the Richter scale — 30 times more energy than a magnitude 7 quake.

Stanford scientists have found evidence that sections of the fault responsible for the 9.0 magnitude Tohoku earthquake that devastated northern Japan in 2011 were relieving seismic stress at a gradually accelerating rate for years before the quake.

There were no immediate reports of injuries or damage from the quake, which was initially measured at a magnitude of 8.0 but later downgraded.

The pair of quakes hit on April 11, startling seismologists with their size (magnitudes 8.6 and 8.2) and location (hundreds of kilometers from the active zone that spawned the deadly 2004 magnitude 9.1 earthquake and tsunami).

In 1964 a region of this same tectonic clash, called the Alaska — Aleutian Subduction Zone, produced the magnitude 9.2 «Good Friday» earthquake, the second - strongest quake ever recorded.

This long period of «afterslip» compares to just a year of afterslip for a similar magnitude quake in Napa, California in 2014, demonstrating large variation in fault behavior after earthquakes.

The federal licenses for the Diablo Canyon plant, near San Luis Obispo, are valid for at least another decade, but opponents were citing seismic and tsunami - related concerns even before last week's magnitude 9.0 quake off the coast of northern Japan

The findings also confirm that the entire area of the Himalayas is capable of producing large earthquakes like the magnitude - 7.8 quake that struck Nepal in 2015.

Stefano Lorito of Italy's National Institute of Geophysics and Volcanology in Rome and colleagues assessed the amount of land movement during the magnitude 8.8 quake that hit Chile in February 2010, claiming over 500 lives.

To the west, a huge swath of the fault remains locked and has been accumulating strain since 1505, when a much more massive magnitude 8.5 quake went off.

The small quakes, which were typically magnitude 3 or 4, occurred along the entire length of the fault line, but each one occurred at the same spot every few years.

Alerts issued by earthquake early warning systems, called EEWs, are based on several parameters: the depth and location of the quake's origin, its estimated magnitude and the ground properties, such as the types of soil and rock that seismic waves would travel through.

Backup power was needed at Fukushima after the magnitude - 9.0 quake struck and the six power lines bringing in offsite electrical power to Fukushima Daiichi were severed, says Michael Weightman, Britain's chief nuclear installations inspector and a member of the International Atomic Energy Agency's International Nuclear Safety Group.

The powerful 8.3 magnitude earthquake that hit Chile overnight was partly a consequence of a massive nearby quake in 2010.

Although the study did not address when the quake might occur, it's possible it could register a magnitude of 8.2 or higher.

How quickly the system can issue warnings is based on a number of factors, including the magnitude of a quake, the number of cellphones detecting it, and the distance of phones from the epicenter.

The magnitude 8.2 earthquake might be part of a pattern of big quakes around the world over the last decade, says Thorne Lay of the University of California Santa Cruz.

In February that year, a quake of 8.8 magnitude killed more than 700 people and shifted the Earth's axis.

In recent years, Oklahoma has had more magnitude 3.0 quakes than California, says Michael Blanpied of USGS, including its two largest ever recorded: a 5.7 magnitude in 2011 and a 5.8 magnitude in 2016.

Another part is on the back end: Devising an algorithm to take data from tens of thousands of smartphones, determine a magnitude and epicenter for the quake, and then issue a timely warning.