Just for reference: G3s aren’t that huge, and hit the earth frequently. And a grazing, rather than a direct hit, won’t do much. What we don’t know when we first see them is how diffuse those CMEs are going to be when they hit us. Most CMEs spread out after they leave the sun, sometimes to such an extent that their impact on earth isn’t significant. The forecasting centers monitor how CMEs develop en route to the earth, so if you’re interested, keep checking their forecasts.
Just for reference: G3s aren’t that huge, and hit the earth frequently. And a grazing, rather than a direct hit, won’t do much. What we don’t know when we first see them is how diffuse those CMEs are going to be when they hit us. Most CMEs spread out after they leave the sun, sometimes to such an extent that their impact on earth isn’t significant. The forecasting centers monitor how CMEs develop en route to the earth, so if you’re interested, keep checking their forecasts.