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 26 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 5 February 2010 Bulletin D 105 ANNOUNCEMENT OF DUT1 From the 11 March 2010, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = +0.0 s Bulletin D 106 should be issued in May 2010