Earth's internal dynamo generates average field in outer core 50 times that at surface A University of California, Berkeley, geophysicist has made the first-ever measurement of the strength of the magnetic field inside Earth's core, 1,800 miles underground. The magnetic field strength is 25 ...
The crust and mantle are rock and contain a lot of silicate – which is the same stuff that glass is made of. But the outer and inner parts of the core mainly consist of iron. Alice And the core is very hot. Am I right?...