Elucidating the physical mechanism responsible for the continuous oscillations represents an intriguing scientific challenge. The source(s) should be close to the Earth's surface, as the ...

You may not know it, but the Earth is always emitting a low hum, which geophysicists call the free oscillation of the Earth. In a recent study, geophysicists have measured Earth’s background hum ...

Park of Yale’s Department of Geology and Geophysics. Spectral peaks of Earth’s free oscillations, indicated by the shapes of vibration deformations of Earth’s sphere. (Full Size Image) “Just like ...

Far from the blaring cacophony of cities, towns and suburbs, there are far quieter soundtracks to be found -- the murmurs of wind rustling grasses, rushing waves tumbling onto beaches, the ...

In 2023, a mysterious 90-second seismic pulse baffled scientists worldwide, traced back to Greenland's Dickson Fjord.

"However, results of the Earth's free oscillation (natural oscillations of Earth as a whole) indicate that the density structures of the Earth's interior are highly heterogeneous, so this ...

"However, results of the Earth's free oscillation (natural oscillations of Earth as a whole) indicate that the density structures of the Earth's interior are highly heterogeneous, so this ...

A study found that the Earth has lost some of its shine over ... Specifically, they attribute the change to Pacific Decadal Oscillation, a long-term fluctuation of the Pacific Ocean during which ...

More information: Zhihong Song et al, Origin and evolution of the North Atlantic Oscillation, Nature Communications (2025). DOI: 10.1038/s41467-025-57395-4 Provided by Peking University ...

there are changes that appear to track with the 70-year oscillations in the inner core’s rotation. Paul Richards, a seismologist at the Lamont-Doherty Earth Observatory at Columbia University ...

Since the 1990s, researchers have known that Earth is constantly vibrating with microseismic activity, known as "free oscillation," scientists reported in a new study describing new recordings of ...