A recent study reveals a new, distinct fifth layer of Earth deep inside the core, which could help inform the evolution of Earth’s magnetic field.
The inner core, which was discovered in 1936 by Danish seismologist Inge Lehmann, makes up less than 1 percent of Earth’s volume . Its distance beneath the surface and small size, though, make it difficult for scientists to measure by direct measurements, so instead they study shock waves triggered by earthquakes.
In the new study, the team observed several earthquakes traversing the diameter of Earth — sometimes up to five times — something that researchers had not recorded “in the history of seismology,” said Pham, who noted previous studies documented only a single bounce. They found that the seismic waves passed through the innermost inner core at different speeds than through the surrounding core, depending on the direction of the wave.
Geophysicist John Tarduno, who was not involved in the research, said the idea of an innermost core has been proposed before but this new data substantially strengthens the case that “there is actually an innermost inner core with a different structure from the outermost inner core.”
México Últimas Noticias, México Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Earth’s true core is a 400-mile-wide iron ball, according to a new studyA new study suggests that Earth's true core could be a ball of iron-nickel that scientists hadn't uncovered yet.
Leer más »
Scientists Find NASA's Mars Rover Would Struggle to Detect Life on EarthBad news if you're hoping to hear about definitive signs of Martian life soon: the instruments of Mars rovers just aren't advanced enough.
Leer más »
Exclusive: Wayfair drops plans for $133M north Houston fulfillment center that would have created 400 jobsExclusive: Wayfair drops plans for $133M Houston fulfillment center that would have created 400 jobs
Leer más »
Arizona's future depends on financing transportation growth through Prop 400 - Phoenix Business JournalIn this guest column, a longtime Valley resident urges both sides to come together to pass an extension for Arizona's Proposition 400, the half-cent sales tax dedicated for transportation infrastructure funding, that is set to expire in 2025.
Leer más »
IAG agrees to buy 80% stake in Air Europa for 400 mln eurosIberia-owner International Airlines Group has agreed to pay 400 million euros ($423.84 million) to Spain's Globalia for the remaining 80% of airline Air Europa it did not already own, the company said in a statement on Thursday.
Leer más »
Earthquakes reveal odd 'fluid' rock layer in Earth's solid mantleA new study demonstrated the potential existance of a fluid rock layer at the very bottom of the upper mantle, that may be ring the entire planet.
Leer más »