Gain knowledge! The nine-square grid takes you to understand geomagnetic storms

Recently, due to the influence of geomagnetic storms, rare auroras have appeared in many places around the world, including the mainland. The aurora is beautiful, but many netizens are asking: What is a geomagnetic storm? What are the implications? Why are there auroras? A set of maps to give you an idea of geomagnetic storms!

Source: Xinhua News Agency