Overview
- Using publicly available readings from 127 stations in southern California and Nevada, researchers reconstructed the April 2, 2024 reentry of China’s Shenzhou‑15 orbital module.
- Their reconstruction placed parts of the flight path more than 50 kilometers north of U.S. Space Command’s forecast and indicated debris landed roughly 30 kilometers south of the predicted area.
- The method identifies the ground vibrations triggered by sonic‑boom shockwaves from objects traveling near Mach 25–30, revealing trajectory, breakup sequence, and probable impact locations.
- Authors argue the technique could speed recovery of hazardous fragments as satellite reentries increase, noting FAA guidance that impact corridors can exceed 2,000 kilometers even an hour before entry.
- Operational limits remain, including sparse station coverage over oceans and some regions, plus the need to fold seismic reconstructions into existing surveillance workflows.