Here’s the Drawing That Proved the Earth Has a Solid Core

When seismology became a ball-shaped scientific discipline , researchers recognise that there was something weird about how seism travel through the ground . At first they thought the outlandishness was due to a liquid burden . This drawing prove they were half right .

As seismographs revolutionized geology in the 1920s , it soon became evident that the Earth was more than just a ball of grunge with a picayune magma mixed in . scientist , of a sudden able to supervise earthquakes as they go on , find that when tremors traveled , they did n’t seem to locomote in a straightforward line or at a steady upper . Seismologists see the reasonableness for this : below the solid rock lay a melted essence . The passage from liquid to solid both bended and delayed ( or quicken ) a wave ’s movement . For a clip , that ’s where the scientific discipline rested .

Then one scientist , after crunching an amazing lot of datum , added another complication . Inge Lehmann , working in Denmark immediately across the earth from a specially combat-ready part of the pacific lip , showed that earthquake did n’t get distorted just once or twice . There was another spanner in the work , and it was most belike made of metal . Though the tremor had moved from the solid ground to the liquid layer , it hit a hearty metal gist . The above drawing represent the twisting of the tremor ’s direction by the core .

Starship Test 9