SEISMIC INSTRUMENTS is founded in 1961 and devoted to the description of geophysical instruments used in seismic research. In addition to covering the actual instruments for registering seismic waves, great care is devoted to solving instrumental-methodological problems of geophysical monitoring applying various methods, which are used to search for earthquake precursors, to study earthquake preparation processes and to monitor natural and technogenous processes. The description of the construction, working elements and technical characteristics of the instruments, as well as some results of implementation of the instruments and interpretation of the results obtained are given. Great attention is paid to papers with description and interpretation of the results of application of various instruments in seismological research, the analysis of quality of seismic networks and earthquake catalogs.