There are at least four artists called Havok: (1) an American thrash metal band ; (2) a German death metal band; (3) a Swedish extreme metal band; and (4) an underground rapper.
These are photos from concerts where Havok played, so they may be of other bands that played the concert as well.
Havok / Overkill / Crowbar Sep 15, 2017 Atlanta, Georgia, United States Uploaded by Concert Mojo
Bloodstock Open Air 2017 Aug 11 - 13, 2017 Walton-on-Trent, UK Uploaded by Josh King
Vagos Metal Fest 2017 Aug 11 - 13, 2017 Vagos, Aveiro, Portugal Uploaded by La666
Bloodstock Open Air Festival 2017 Aug 10 - 13, 2017 Derby, England, United Kingdom Uploaded by Jason French