activate_blog
Fires after a network site is activated.
WordPress File wp-admin/network/sites.php
deactivate_blog
Fires before a network site is deactivated.
network_sites_updated_message_{$_GET[‘updated’]}
Filters a specific, non-default site-updated message in the Network admin.
network_sites_updated_message_{$action}
Filters a specific, non-default, site-updated message in the Network admin.