INTERNATIONAL   EARTH   ROTATION   SERVICE   (IERS) 
                     SERVICE INTERNATIONAL LA ROTATION  TERRESTRE




BUREAU CENTRAL DE L'IERS
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: iers@obspm.fr                                 Paris, 17 July 1997
                                                        Bulletin D 70










                               ANNOUNCEMENT OF DUT1




         From the


                               18 September 1997, 0h UTC


until further notice, the value of DUT1 to be disseminated with the time
signals will be


                                  DUT1 = + 0.4 s


         Bulletin D 71 should be issued in September 1997.