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6.4 quake shakes northern Argentina, capital
BUENOS AIRES, Argentina—A magnitude-6.4 earthquake has struck north-central Argentina, shaking things up enough to make people evacuate some buildings in the capital hundreds of miles (kilometers) away.
The U.S. Geological Service says the quake’s epicenter was 80 miles (130 kilometers) southeast of Santiago del Estero, a provincial capital of 250,000 people and the 12th-largest city in Argentina.
It was centered deep underground, nearly 400 miles (600 kilometers) below the surface, where quakes generally cause less damage.
The shaking prompted people to spill out of the San Isidro courts building in Buenos Aires province Friday morning.
7.1 Quake strikes off Alaskan coast
An earthquake with a preliminary magnitude of 7.1 struck Friday off the coast of Alaska, the U.S. Geological Survey reported.
The quake was initially reported to have occurred a depth of 6.2 miles, but the Geological Survey later updated its reading to say it was 22 miles deep.
The earthquake occurred 120 miles east-southeast of Atka, Alaska, in a sparsely populated part of the Aleutian Islands known as the Fox Islands. The epicenter was 1,658 miles west southwest of Anchorage, the Geological Survey said.
It prompted a brief tsunami Read more…
4.2-magnitude quake rumbles across Los Angeles
LOS ANGELES (AP) — A magnitude-4.2 earthquake and aftershocks rattled nerves across the Los Angeles region Thursday, but there were no immediate reports of damage.
The quake hit around 1:47 p.m. and was centered 24 miles northwest of downtown Los Angeles. It was followed by more than a half-dozen aftershocks up to magnitude-3. The jolt was felt widely across Los Angeles County including the San Fernando and Read more…
Is The Number Of Earthquakes Increasing? Why The 5.8 Virginia Earthquake Might Just Be A Preview Of Things To Come
Is the number of earthquakes increasing? Are major earthquakes becoming more frequent? In the aftermath of the magnitude-5.8 earthquake in Virginia, a whole lot of people are asking those questions. All over the mainstream media, “experts” are coming on and assuring the public that all of this is “normal” and that the number of earthquakes is not actually increasing. The USGS continues to insist that the frequency of major earthquakes has been “fairly constant” and that there is no reason for alarm. But is that really the truth? In this article, you will be presented with evidence that the number of earthquakes is definitely increasing. Please approach the evidence with an open mind. The truth is that this year we are on pace to have more than twice Read more…
Strong 6.8 quake hits near East Timor
DILI, East Timor — A powerful 6.8-magnitude earthquake struck deep beneath the seabed near East Timor on Tuesday but no tsunami warning was issued, a local geophysics agency said.
The quake hit at 13:57 pm (0657 GMT) at a depth of 469 kilometres (291 miles), about 271 kilometres northeast of the capital, Dili, according to Indonesia’s geophysics agency.
“We did not issue a tsunami warning. There are no reports of damage so far,” said Novita, an official at Indonesia’s national quake centre.
“The quake was felt by the people in Timor island, but not strongly,” Read more…
Virginia quake may have exceeded nuclear plant design
The historic earthquake that shut Dominion Resources Inc’s North Anna nuclear plant in Virginia last week may have shaken the facility more than it was designed to withstand, the U.S. nuclear regulator said on Monday.
The Nuclear Regulatory Commission said it had sent a special inspection team to the plant rocked by the 5.8-magnitude quake, after initial reviews from Dominion indicated the ground motion may have exceeded North Anna’s design parameters.
The plant cannot be restarted until the operator can show no Read more…
Ancient faults still prove to be powerful
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“Our discussion was interrupted,” Department Chair Chuck Bailey said, “by a motion from the floor.”
All joking aside, even the experts didn’t realize what was going on at first.
“We thought it was construction,” Chancellor Professor of Geology Heather Macdonald said.
However, when the tremor continued for nearly 20 seconds the geologists realized they had a quake on their hands – a major quake. A 5.8 on the Richter scale is significant for the region.
According to reports, the earthquake occurred at 1:51 p.m. and was centered in Mineral, Va., which is about half way between Richmond and Charlottesville. Tremors were felt as far north as Maine.
Bailey, a structural geologist who teaches courses on Virginia geology, is particularly familiar with the area’s seismic activity. Following Tuesday’s event, his expertise was sought out by national and local media.
“This is a once-in-a-century earthquake, anyway you slice it”, Bailey told the Associated Press, adding that quakes of a similar Read more…
Strong East Coast quake highly unusual: scientist
Washington Monument tilting as a result of the 5.9 earthquake
(Reuters) – The strong earthquake that rattled the eastern United States on Tuesday was highly unusual in its severity, though it was centered in a part of Virginia known for smaller quakes, seismologists said.
The initial earthquake, which registered a magnitude of 5.9 just before 2 p.m. EDT, was felt from the Carolinas to New England.
“One of this size is highly unusual,” said Karen Fisher, a professor of seismology at Brown University and president-elect of the seismology section at the American Geophysical Union. “This is the largest earthquake by far that I am aware of occurring there in recent history.”
The quake’s epicenter in central Virginia is in an area the U.S. Geological Survey calls the Central Virginia Seismic Zone, Fisher said by phone from Providence, Rhode Island.
While the strength of the quake was unusual, the Read more…
Earthquake map shows epicenter in central Virginia (Video)
View full sizeU.S. Geological SurveyThe U.S. Geological Survey has posted this map of the 5.9-magnitude earthquake that hit central Virginia just before 2 p.m. today, sending tremors up and down the East Coast.
The yellow glow represents the area where potential damage is deemed “light” and perceived shaking is “moderate.”
The quake’s frequency hit the geology of the region just right, like a tuning fork, and reverberated outward, said Alexander Gates, the chairman of earth and environmental sciences at Rutgers-Newark, and an earthquake expert. But there’s no likely danger for aftershocks of the Virginia quake, which will be significantly more minor, he said.
“That was pretty good, huh? I was impressed,” Gates said. “You don’t get earthquakes like that so often on the East Coast.”
Though small earthquakes occur in New Jersey all the time, earthquake experts said today’s shaking was highly unusual.
“It’s probably the largest one people have felt in New Jersey in decades,” Read more…
Colorado: Midnight earthquake felt in Springs, largest in state since ’73
GOLDEN — A magnitude 5.3 earthquake shook southern Colorado late Monday, waking some people up and startling hundreds of others, including some in Colorado Springs.
Colorado Springs residents reported feeling the temblor about 11:49 pm Monday on Twitter at @csgazette.
The USGS link online confirmed the tweets’ accuracy.
The magnitude 5.3 earthquake was recorded at about 11:46 p.m. MDT Monday about nine miles southwest of Trinidad, and about 135 miles south of Colorado Springs, according to the National Earthquake Information Center in Golden. The quake followed two smaller ones that hit the area earlier in the day.
The quake is the largest in Colorado since a magnitude 5.7 was recorded in 1973, U.S. Geological Service geophysicist Amy Vaughn said. That one was centered in the northwestern part of the state — about 50 miles north of Read more…
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