INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. 33 (0) 1 40 51 22 29 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 18 March 2013 Bulletin D 115 ANNOUNCEMENT OF DUT1 From the 11 April 2013, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = +0.1 s Bulletin D 116 should be issued in August 2013