As if the earth were one of them Matryoshka Russian women, a new study published Tuesday in Communications of nature Provides new data on the possible existence of a nucleus internal About Earth: An iron ball about 650 km in radius, which until now was thought to be the inner core.
The findings, the researchers said in a press release, may improve our understanding of Earth’s formation and evolution.
Probing the center of the Earth is crucial to understanding the formation and evolution of the planets. The existence and size of such an inner core has long been hypothesized and debated.
However, probing the Earth’s innermost core has been difficult due to a lack of probes sensitive enough to probe the Earth’s deep interior.
Thanh-Son Phạm and Hrvoje Tkalčić collected data from existing probes to measure the different arrival times of seismic waves of energy created by earthquakes as they travel through the Earth.
A different inner envelope
For the first time, they recorded waves that reverberated five times the diameter of the Earth. The travel times of the waves indicate the existence of a distinct inner envelope with a radius of about 650 km separated from the outer shell of the inner core.
The authors suggest that this inner interface may reflect a past change in inner core growth.
The authors suggest that future research should focus on characterizing the transition between the deep inner core and the outer shell of the inner core to better understand Earth’s deep interior and its generation history.
Source: El Diario