Meaning of notices in weird.log

Is there some kind of explanation page that describes the meaning of
all the different notifications that can be found in weird.log?
Specifically I want to learn what SYN_seq_jump means.

Thanks.

I haven't seen a page describing what these mean, but the Bro project
on github is useful for finding this type of info.

If you take any of the strings listed in the actions table in the file
scripts/base/frameworks/notice/weird.bro and search for them on
github, you'll find where the weird is generated from. That should put
you on the right track to figuring out what it means.

https://github.com/bro/bro/search?utf8=✓&q=SYN_seq_jump&type=Code

Josh