Title text:
Detectives say the key to tracking down the source of the kites was a large wall map covered in thumbtacks and string. ‘It’s the first time that method has ever actually worked,’ said a spokesperson.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3121/
Yes, meant not on the equator, above as in northern (or southern)