The Earth’s magnetic field isn’t as stable as we think. In fact, it flips—and the last full reversal happened about 700,000 years ago. But what causes that kind of upheaval? Some researchers suspect extreme events—like what happened during the Younger Dryas—could be powerful enough to disrupt Earth’s geomagnetic field. Add to that plasma physics, gravity’s mysterious weakness, and solar volatility… and we’re only scratching the surface. | The Randall Carlson

58K views · 433 reactions | Geomagnetic storms, caused by coronal mass ejections (CMEs) from the sun colliding with Earth’s magnetosphere, can trigger auroral displays and disrupt technology. Intense storms can deplete ozone, increase cosmic ray exposure, and create isotopes like beryllium-10 and carbon-14, helping scientists gauge the storm’s strength and potential impact. | The Randall Carlson | Facebook