We analyze variable geomagnetic field δΤ which characterizes the change in electrical conductivity in the Earth's crust for the Armenia from 1986 to 1993. Clear geomagnetic precursors of the Paravan (13.05.1986, М=5.4) and Spitak (07.12.1988, М=7.0) earthquakes are obtained. About half a year before the Spitak earthquake, the parameters of the ratios of bay-like variations (30–60 and 5–25 min) of the horizontal and vertical components of the geomagnetic field δΤ decreased by about 30%. An analysis of the data two months before the Paravan earthquake also shows a sharp drop in the values of this parameter by 20–25%. In the interval between two earthquakes, the ratios of bay-like variations lie in the range of ± 10% with an average value of 1. For the Sq variations of the δD, δH, and δZ components of the geomagnetic field δΤ, a sharp drop was observed about a month before the Paravan earthquake from 1.2 to 0.8. After the Paravan earthquake, all three components partially returned to their pre-earthquake parameters (~ 1.2) within a few months. Further, a monotonous decrease in all three components of the geomagnetic field was observed up to the Spitak earthquake from 1.2 to 0.54. After this earthquake, the bay-like and Sq variations returned to normal values between 1 and 1.2 within a few months. The difference in the behavior for the bay-like and Sq variations in the period between two earthquakes is possibly associated with the beginning of the preparation of the Spitak earthquake a few months after the Paravan earthquake.