Figure 2: (a) consecutive passes of Intercosmos-19 satellite over equatorial anomaly. In figure legend are shown time before earthquake and longitudinal distance of the satellite orbit from the epicenter longitude sign “−” indicates satellite pass eastward and sign “+” pass westward from the epicenter longitude; (b) tomographic reconstruction of the difference of the vertical distribution of electron density between July 6 and July 5 1979 (red and black lines at the left panel).