Detection of Earth’s free oscillations utilizing TianQin
Detection of Earth’s free oscillations utilizing TianQin
https://www.eurekalert.org/news-releases/1134062
Publish Date: 2026-06-29 13:32:00
Source Domain: www.eurekalert.org
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Figure 1: The figure illustrates the Earth’s free oscillation response within the TianQin TDI-X channel, derived from both numerical simulation and analytical modeling approaches. The earthquake that induces the Earth’s free oscillations occurs on day 30. The numerical simulation result is depicted by the blue solid line, while the analytical model result is represented by the orange dashed line. The green solid line illustrates the residual resulting from the subtraction of the aforementioned two results. With the exception of a minor region near the occurrence of the earthquake, the numerical result closely aligns with the predictions of the analytical formula.
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Credit: Space: Science & Technology
As humanity’s exploration of the Earth’s internal structure deepens, Earth’s free oscillations, serving as crucial “fingerprints” for revealing the large-scale structure and dynamic processes within the Earth, have always been a core subject in geophysics. Ground-based station observations are currently the mainstream method for measuring Earth’s free oscillations. With the advancement of space technology, high-precision inter-satellite distance measurement holds the potential to become a novel method for detecting these oscillations.
In a recent paper published in Space: Science & Technology, a research team from the School of Physics and Astronomy at Sun Yat-sen University, in collaboration with the TianQin Research Center for Gravitational Physics, proposed a novel detection and analysis method for Earth’s…
