Australia's Minister for Education and Training Simon Birmingham speaks at the Opening Ceremony of the 2017 International Astronautical Congress (IAC) in Adelaide Adidas Superstar Mesh Zwart Goedkoop , Australia, Sept. 25, 2017. Australia's Minister for Education and Training Simon Birmingham officially announced here on Monday that Australia will establish its own national space agency. (XinhuaXu Haijing)
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WASHINGTON, Aug. 2 (Xinhua) -- The destructive power released by human-induced and naturally occurring earthquakes in the central United States is actually "indistinguishable," a U.S. study said Wednesday.
The finding Adidas Superstar W Leather Wit Power Rood Ba7585 Goedkoop , published in the U.S. journal Science Advances, contradicted previous observations suggesting that induced earthquakes exhibit weaker shaking than natural ones.
Earthquakes in the central U.S. have increased over the past 10 years due to the expansion of unconventional oil and gas operations that discard wastewater by injecting it into the ground.
About three million people in Oklahoma and southern Kansas live with an increased risk of experiencing induced earthquakes.
A key question is whether these induced earthquakes excite ground motions that are substantially different than those of naturally occurring earthquakes.
To answer this question, the new study used available instrumental recordings to estimate the stress drop -- the difference between the stress across a fault before and after an earthquake -- of 39 moderate-magnitude induced and natural earthquakes in the central U.S and in eastern North America.
Once the faulting mechanism and the depth of the quakes are accounted for, the stress drops of induced and natural earthquakes in the central U.S. share the same characteristics Dames Adidas Superstar Wit Power Rood BB0532 Goedkoop , results showed.
"Our study shows that induced earthquakes and natural earthquakes in the central U.S. are inherently similar, and we can predict the damaging effects of induced earthquakes using the same framework as natural earthquakes," said first author Yihe Huang, an assistant professor at the University of Michigan.
The study also found that naturally occurring earthquakes in the eastern North America may lead to stronger shaking than natural earthquakes in the central United States.
That's because most eastern earthquakes occur on reverse faults Adidas Superstar W Dames Wit Rood Goedkoop , while most central U.S. induced and natural earthquakes occur on strike-slip faults. Reverse-faulting earthquakes typically have stronger shaking than strike-slip earthquakes.
The scientists said that the types of rocks being exploited by unconventional oil and gas recovery in the U.S. and Canada can be found all over the world, making the results of this study widely applicable.
"As we can learn better practices, we can help ensure that the hazards induced earthquakes pose can be reduced in other parts of the world as well," added co-author William Ellsworth Adidas Heren Superstar Skate Zwart Goedkoop , co-director of Stanford University's Center for Induced and Triggered Seismicity.
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WASHINGTON, Dec. 15 (Xinhua) -- A man killed 6 people and wounded another in three different homes outside Philadelphia and remained at large hours after the shootings, authorities said Monday.
The shootings occurred around 4 a.m. local time in three small towns that are within a few kilometers of each others in Montgomery County, the U.S. State of Pennsylvania Adidas Heren Superstar Skate Groen Goedkoop , according to a statement of Montgomery County District Attorney.
The local police have identified the suspect in the shootings as 35-year-old William Stone and all of the victims had a " familial relationship" to the suspect, the statement said.
Police are investigating into the incident while still hunting the suspect in the area.
By Burak Akinci
ANKARA, July 5 (Xinhua) -- The Turkish government is planning a series of activities to mark the anniversary of the last year's coup attempt on July 15 including nationwide rallies dubbed "Democracy Watch."
Festivities planned between July 11 and 16 will include seminars and activities. "Democracy Watch", rallies that took place for nearly a month after the military coup attempt last summer across the nation to protest the coup plotters and reaffirm determination to protect democracy Adidas superstar pharrell supershell Heren Goedkoop , will take place throughout the week.
"On the anniversary, we will hold a 'Democracy Watch' as a symbolic commemoration," announced ruling Justice and Development Party (AKP) spokesman Mahir Unal.
"We will hold events in (all) 81 provinces around Turkey. The people who went out in the streets on the night of the coup were defending democracy and the will of the people," said Unal.
One of the venues of the commemorations will be the Parliament in Ankara Adidas Heren Superstar Pharrell Supershell Wit Goedkoop , bombarded by warplanes during the night of the coup.
AKP is also planning to celebrate the failure of the coup with various activities, inviting the families and friends of those who died during the fight against the rebels.
President Recep Tayyip Erdogan, whose remarks o.
