We also shouldn't forget about the Schumann resonances phenomenon which can also have a great impact on Earth's strange noices 

https://youtu.be/6Tc7XI0iUYU?feature=shared

> Combining the satellite data with evidence of magnetic field line movements on Earth, European geoscientists mapped the so-called Laschamps event and represented it using natural noises like the creaking of wood and the crashing of colliding rocks.

I'm curious about what this mapping procedure exactly entails.

south_korea_ln

Earth's magnetic field dramatically flipped a little more than 40,000 years ago. We can now experience this upheaval as an unnerving clatter interpreted from information collected by the European Space Agency's Swarm satellite mission.