Mohorovičić discontinuity

After an earthquake in the Balkans, it was found that deeper waves traveled faster than shallower ones, suggesting that Earth was made of multiple discontinuous layers. This sharp separation below the crust is called the Mohorovičić discontinuity.
 Andrija Mohorovičić Croatia 1910 Mohorovičić discontinuity

After an earthquake in the Balkans, it was found that deeper waves traveled faster than shallower ones, suggesting that Earth was made of multiple discontinuous layers. This sharp separation below the crust is called the Mohorovičić discontinuity.