Wow, this sounds exciting, Dayna Von Thaer! I like Sci-Fi movies like this. "The Day After Tomorrow," "The Core," "Greenland," etc.

I think the first part of your logline needs a little work. Not much. Here's two logline suggestions:

"After a massive solar flare erupts and blinds half of the global population, a team of scientists in the Antarctic fights to get to their families on the mainland before being trapped at the south pole."

"After a massive solar flare erupts and blinds half of the world, a team of scientists in the Antarctic fights to get to their families on the mainland before being trapped at the south pole."