Browsing Tag
Seismic activity
2 posts
The 8.5-Year Cycle of the Earth’s Inner Core: A Puzzling Phenomenon that Challenges Assumptions
Scientists from China have substantiated the presence of an Inner Core Wobble (ICW) lasting approximately 8.5 years, observed in both polar motion and length-of-day variations. This discovery unveils a static tilt of roughly 0.17 degrees between the Earth's inner core and mantle, challenging conventional assumptions and offering valuable insights into the Earth's internal dynamics and density distribution. The identification of this Inner Core Wobble provides a new dimension to our understanding of the intricate movements and relationships within the Earth's core and mantle, fostering advancements in the field of geophysics.
Contemporary Earthquakes Could Stem from 1800s Seismic Activity: A Possible Aftershock Connection
During the 1800s, the continental interior of North America witnessed some of the most powerful earthquakes recorded in U.S. history. Nearly two centuries later, a study published in the Journal of Geophysical Research: Solid Earth suggests that the central and eastern United States may still be undergoing aftershocks stemming from those historical events.