WordPress at a glance
action is not described

activity_box_end action-hook . WP 2.0.0

Fires at the end of the 'At a Glance' dashboard widget.

Prior to 3.8.0, the widget was named 'Right Now'.

Usage

add_action( 'activity_box_end', 'action_function_name_4869' );
function action_function_name_4869(){
	// action...
}

Where the hook is called

wp_dashboard_right_now()
activity_box_end
wp-admin/includes/dashboard.php 371
do_action( 'activity_box_end' );

Where the hook is used (in WP core)

wp-admin/includes/admin-filters.php 14
add_action( 'activity_box_end', 'wp_dashboard_quota' );