Move a string containing digits_digits to start of filename

[w945106]

How do I move "digits_digits" to the start of a filename?
There are many variations of the following:

Name: Volcano_NP_200606_0325_NIX.jpg

New Name: 200606_0325_Volcano_NP_NIX.jpg

Name: Steamboat_200512_001_NIX.jpg

New Name: 200512_001_Steamboat_NIX.jpg

I can clean up the leading underscores e.g. "_200606" or double underscores e.g. "__" later if that makes the expression simpler.

Thanks.

[Luuk]

For the examples, can use a Match and Replace something like...
^(.+_)(20\d{4}_\d+_)(.+)
\2\1\3

[w945106]

Luuk,

Thank you. That worked with a couple variations.

For the examples, can use a Match and Replace something like...
^(.+_)(20\d{4}_\d+_)(.+)
\2\1\3

This worked to rename about half:
^(.+_)(\d+_\d+_)(.+)
\2\1\3

And this another quarter:
^(.+_)(\d+_\d+_?)(.+)
\2_\1\3

The rest I can do manually.