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=== Seismicity ===
The Ryukyu Arc is a site of active [[seismicity]] characterised by shallow earthquakes, given the ongoing convergence between the Philippine Sea Plate and Eurasian Plate.<ref name=":9" /> Seismic data of earthquakes have been used to detect seismic structures below the Ryukyu Arc.<ref name="a">Roecker, S. W., Yeh, Y. H., & Tsai, Y. B. (1987). Three‐dimensional P and S wave velocity structures beneath Taiwan: Deep structure beneath an arc‐continent collision. ''Journal of Geophysical Research: Solid Earth, 92''(B10), 10547–10570.</ref> [[Low-velocity zone|Low seismic velocity zones]], which are possibly associated with the upwelling of magma, have been discovered beneath active volcanoes and the Okinawa Trough.<ref name="a"></ref>
[[File:M≥6.0 (1960-2022) Earthquakes in the Ryukyu Arc.png|thumb|546x480px|M≥6.0 (1960-2022) Earthquakes in the Ryukyu Arc. Earthquake data from USGS-ANSS Catalog. Contours in 1000m interval.]]
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