WordPress at a glance
action is not described

loop_no_results action-hook . WP 4.9.0

Fires if no results are found in a post query.

Usage

add_action( 'loop_no_results', 'action_function_name_4105' );
function action_function_name_4105( $this ){
	// action...
}
$this(WP_Query)
The WP_Query instance.

Where the hook is called

WP_Query::have_posts()
wp-includes/class-wp-query.php 3134
do_action( 'loop_no_results', $this );

Where the hook is used (in WP core)

Does not used.