Chilean Quake Likely Shifted Earth’s Axis, NASA Scientist Says, Shortened Day
2010 03 02
By Alex Morales | BusinessWeek.com
The earthquake that killed more than 700 people in Chile on Feb. 27 probably shifted the Earth’s axis and shortened the day, a National Aeronautics and Space Administration scientist said.
Earthquakes can involve shifting hundreds of kilometers of rock by several meters, changing the distribution of mass on the planet. This affects the Earth’s rotation, said Richard Gross, a geophysicist at NASA’s Jet Propulsion Laboratory in Pasadena, California, who uses a computer model to calculate the effects.
“The length of the day should have gotten shorter by 1.26 microseconds (millionths of a second),” Gross, said today in an e-mailed reply to questions. “The axis about which the Earth’s mass is balanced should have moved by 2.7 milliarcseconds (about 8 centimeters or 3 inches).”
The changes can be modeled, though they’re difficult to physically detect given their small size, Gross said. Some changes may be more obvious, and islands may have shifted, according to Andreas Rietbrock, a professor of Earth Sciences at the U.K.’s Liverpool University who has studied the area impacted, though not since the latest temblor.
Santa Maria Island off the coast near Concepcion, Chile’s second-largest city, may have been raised 2 meters (6 feet) as a result of the latest quake, Rietbrock said today in a telephone interview. He said the rocks there show evidence pointing to past earthquakes shifting the island upward in the past.
“It’s what we call the ice-skater effect,” David Kerridge, head of Earth hazards and systems at the British Geological Survey in Edinburgh, said today in a telephone interview. “As the ice skater puts when she’s going around in a circle, and she pulls her arms in, she gets faster and faster. It’s the same idea with the Earth going around if you change the distribution of mass, the rotation rate changes.”
Rietbrock said he hasn’t been able to get in touch with seismologists in Concepcion to discuss the quake, which registered 8.8 on the Richter scale.
“What definitely the earthquake has done is made the Earth ring like a bell,” Rietbrock said.
The magnitude 9.1 Sumatran in 2004 that generated an Indian Ocean tsunami shortened the day by 6.8 microseconds and shifted the axis by about 2.3 milliarcseconds, Gross said.
The changes happen on the day and then carry on “forever,” Benjamin Fong Chao, dean of Earth Sciences of the National Central University in Taiwan, said in an e-mail.
“This small contribution is buried in larger changes due to other causes, such as atmospheric mass moving around on Earth,” Chao said.
Article from: BusinessWeek.com
Video from: YouTube.com
Chile quake may have shortened day
Solar waves make Earth ring like a bell
The World Axis, Cosmic Axis, or Axis Mundi. Plasma Mythology (Video)
Chile struck by one of strongest earthquakes ever, over 300 dead
Google Liquid Galaxy Machine Sends Users on Immersive Tour of Earth, Moon, and Mars
Chavez: US weapon test caused Haiti earthquake (Video)
The Haiti Earthquake - Where did It Came From?
"The tilting of the earth changes everything"
Earth’s north magnetic pole racing towards Russia due to core flux
Could Global Warming Change Earth’s Tilt?
Scientists Track Down Source of Earth’s Hum
Quakes Make Earth Ring Like Bell (Archive 1960)
Rumblings on the moon could be problematic for lunar base
Quakes, Solar Activity, Moon Phase Related--Study
Latest News from our Front Page
CIA torture is reason for France to exit NATO – Le Pen
The shocking revelations of CIA torture techniques give France a reason to exit NATO, National Front party leader Marine Le Pen said on Saturday. The report on the CIA’s former interrogation practices has drawn wide criticism since its release.
“If indeed everyone is outraged by the tortures used by the US then, let’s leave NATO,” Le Pen said during an interview ...
900 Documented Examples of Obama's Lawbreaking, Lying, Corruption, Cronyism, Hypocrisy & Waste
By Tim Brown from sonsoflibertymedia.com:
Our friend, Dan from Squirrel Hill, has updated his list to 900 documented examples of Barack Obama¡¯s lying, lawbreaking, corruption, cronyism, etc. He began with 252 examples, then quickly grew to 504 and later to 694. Recently, he added more than 200 more examples of the usurper-in-chief¡¯s unlawful acts.
Every President, every politician, and every human ...
A Step Closer to the Mysterious Origin of the Viking Sword Ulfberht
2014 12 16
The universe is full of mysteries that challenge our current knowledge. In "Beyond Science" Epoch Times collects stories about these strange phenomena to stimulate the imagination and open up previously undreamed of possibilities. Are they true? You decide.
Ulfberht was like a Medieval luxury brand for swords—but unlike your Gucci purse, the swords were of such high quality they were almost ...
Israel proposes natural gas pipeline to Southern Europe
Israel is pushing for the European Union (EU) to approve the construction of a pipeline running from the Middle Eastern country to supply Cyprus, Greece and Italy with natural gas. The proposed EastMed pipeline will carry gas from the Tamar and Leviathan gas fields located in the Mediterranean Sea, to Southern Europe. As the Times of Israel reported in an ...
As Robots Grow Smarter, American Workers Struggle to Keep Up
2014 12 16
A machine that administers sedatives recently began treating patients at a Seattle hospital. At a Silicon Valley hotel, a bellhop robot delivers items to people’s rooms. Last spring, a software algorithm wrote a breaking news article about an earthquake that The Los Angeles Times published.
Although fears that technology will displace jobs are at least as old as the Luddites, there ...
|More News » |