GEOPHYSICS

ULF response of the ionosphere on processes preceding earthquakes

S. V. Bilichenko^abcd, A. S. Inchin^abcd, È. F. Kim^abcd, O. A. Pokhotelov^abcd, P. P. Pushchaev^abcd, G. A. Stanev^abcd, A. V. Strel'tsov^abcd, V. M. Chmyrev<sup>abcd

a</sup> Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moskovskaya obl.
^b The Institute of the Earth Physics, AS USSR, Moscow
^c Institute of Mathematics and Mechanics, AS of KazSSR, Alma-Ata
^d Space research institute Bulgarian Academy of Sciences, Sofia

UDC: 550.384.33

Presented: M. A. Sadovskii
Received: 04.12.1989