WordPress at a glance
action is not described

loop_end action-hook . WP 2.0.0

Fires once the loop has ended.

Usage

add_action( 'loop_end', 'action_function_name_7374' );
function action_function_name_7374( $this ){
	// action...
}
$this(WP_Query)
The WP_Query instance (passed by reference).

Where the hook is called

WP_Query::have_posts()
loop_end
wp-includes/class-wp-query.php 3123
do_action_ref_array( 'loop_end', array( &$this ) );

Where the hook is used (in WP core)

Does not used.