The lithosphere and the atmosphere / ionosphere, continue to exchange energy through various coupling mechanism. The earthquake creates energy waves, such as Direct Shock Acoustic Waves (SAWs) and Rayleigh wave induced acoustic waves (RAWs) and atmospheric gravity waves (AGW) when the earthquakes occur at sea. If the earthquake event is large enough (Mw> 6), then SAWs, RAWs and AGWs induce the detected ionosphere plasma as an anomaly. Near the epicentrum, the Coseismic Ionospheric disturbance (CID) diffuses at almost the same speed as the acoustic wave speed of the shock in the ionosphere. At the distant point of the epicentrum, Rayleigh waves will induce ionospheric interference. Resuming seismological information from seismo-ionospheric manifestations is a subject related to ionospheric seismology. In this study, the ionospheric response to earthquakes was analyzed using TEC data in Indonesia as a manifestation of how the seismo-ionospheric phenomenon in Indonesia. In this paper, a study of seismo-ionospheric manifestations of earthquakes will be conducted. As a case study, Aceh earthquake events were used on December 26, 2004 and Yogyakarta on May 27, 2006. By using TEC data from  Coco (3.84^o N; 94.79^o E), DGar (6.17^o N; 93.26^o E), Hyde (11.8^o N; 92.14^o E) and Kerg (5.04^o N; 93.77^o E) stations. And then processing and analyzing data conducted with FFT to determine speed and amplitude of GPS signal. From thisis  expected that the seismo-ionospheric manifestations show the behavior of CID and RAWs.