Autos gegen Lastenräder getauscht: Mobilitätswoche in Bergisch Gladbach eröffnet rundschau-online.de - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from rundschau-online.de Daily Mail and Mail on Sunday newspapers.
The researchers detailed their findings in a paper published May 26 in the journal
AGU Advances.
What causes deep-focus earthquakes?
Deep-focus earthquakes are earthquakes that occur between 185 and 435 miles below the Earth’s surface. First detected in the 1920s, these earthquakes continue to confound scientists to this day.
“The big problem that seismologists have faced is how it’s possible that we have these deep-focus earthquakes at all,” said co-author Lara Wagner.
Usually, earthquakes occur near the surface after stress builds up between two blocks of rock. When enough stress has accumulated, it causes this pair of rocks to suddenly slip and slide past each other, triggering earthquakes.
Washington, DC The cause of Earth's deepest earthquakes has been a mystery to science for more than a century, but a team of Carnegie scientists may have cracked the case. New research published in AGU Advances provides evidence that fluids.
May 28, 2021 05:31 AM EDT
Common Earthquakes
(Photo : Photo by Yuichi Yamazaki/Getty Images)
The majority of earthquakes happen within 70 kilometers of the Earth s surface. They occur when tension builds up at fault between two chunks of rock, forcing them to slide past each other unexpectedly.
Deep Earthquakes
(Photo : Photo from IFRC Europe)
However, deeper within the Earth, the tremendous pressures generate too much friction for this type of sliding to occur, and the high temperatures help rocks bend to adapt to shifting stresses. Since the 1920s, scientists have been able to identify earthquakes that originate more than 300 kilometers under the surface, despite the fact that it is logically unthinkable.
The cause of Earth s deepest earthquakes has been a mystery to science for more than a century, but a team of Carnegie scientists may have cracked the case. New research published in AGU Advances provides evidence that fluids play a key role in deep-focus earthquakes which occur between 300 and 700 kilometers below the planet s surface.