25 years ago, in Bolivia a huge 8.2-magnitude earthquake in a populated region. An international team of scientists has analyzed data and uncover unidentified “mountains” deep within Earth’s interior. According to scientist there is another layer called the “transaction zone” which split the mantle in two.

For more info, please read the original article by Newsweek:
https://www.newsweek.com/enormous-earthquake-hidden-mountains-410-miles-underground-1332628