A geomagnetic storm was underway earlier today (June 26). Solar wind speed is currently above 540 km/s. The reason for the storm is a crack that has opened in Earth's magnetic field, allowing solar wind to enter the magnetosphere. Immense cracks sometimes develop in Earth's magnetosphere and remain open for hours. Solar wind can pour through the gaps to fuel bright displays of Arctic lights. Our magnetic shield takes the brunt of space storms, but some energy slips through its cracks, sometimes enough to cause problems with satellites, radio communication, and power systems. The solar wind is a fast-moving stream of electrically charged particles (electrons and ions) blown constantly from the Sun. The wind can get gusty during violent solar events, like coronal mass ejections (CMEs), which can shoot a billion tons of electrified gas into space at millions of miles per hour.