A fury is building on the surface of the Sun. It is erupting with high-velocity jets, a fiery wave that reaches 100,000 kilometers high, and rising loops of electrified gas. What's driving these strange phenomena? How will they affect planet Earth? As digital technology and electrical grids have spread, scientists have found that violent solar storms pose a threat on the scale of hurricanes Katrina and Harvey.

A fury is building on the surface of the Sun. It is erupting with high-velocity jets, a fiery wave that reaches 100,000 kilometers high, and rising loops of electrified gas. What's driving these strange phenomena? How will they affect planet Earth? As digital technology and electrical grids have spread, scientists have found that violent solar storms pose a threat on the scale of hurricanes Katrina and Harvey.