Biochemistry, Genetics and Molecular Biology · Molecular Biology
A roughly 70-year pattern in Earth’s rotation appears in both measurements of the length of the day and estimates of motion in the fluid outer core. In the study’s fitted model, this cycle alone does not indicate sustained near-term shortening of the day that would require a negative leap second.
Gravity and ground-position measurements recorded changing underground mass before, during and after Santorini’s 2025 earthquake crisis. The results were interpreted as evidence of deeper magma intrusion followed by possible dyke or hot-fluid movement near the Kolumbo fault zone.
Iron-rich regions at the boundary between Earth’s core and mantle may store heavy iron isotopes and carry them upward in rising mantle plumes. The proposed deep source could help explain why ocean-island basalts have heavier and more variable iron isotope compositions than mid-ocean ridge basalts.
