"Not only are they gigantic. But as Venus doesn’t have a magnetic field to protect itself, the hot flow anomalies happen right on top of the planet. They could swallow the planet whole."
Source: Glyn Collinson, a space scientist at NASA’s Goddard Space Flight Center in Greenbelt, MD, making comments associated with the recent discovery that a common space weather phenomenon on the outskirts of Earth’s magnetic bubble, the magnetosphere, has much larger repercussions for Venus. The giant explosions, called hot flow anomalies, can be so large at Venus that they’re bigger than the entire planet and they can happen multiple times a day.