This Diagram of Earth Is a Lie

The video challenges the traditional view of Earth's mantle as a smooth layer, revealing it as uneven with continent-sized blobs. These blobs, discovered using seismic tomography, are crucial to understanding Earth's surface activities. Seismometers, typically used for earthquakes, help map these irregularities by analyzing seismic wave speeds, which vary with rock temperature and density. The blobs, possibly made of iron peroxide, may have formed from mantle rock reacting with seawater. They are linked to volcanic centers, like Hawaii, and could influence Earth's magnetic field over millions of years.

What is seismic tomography, and why is it important?

Discuss the potential implications of the blobs on volcanic activity as mentioned in the text.