@article{Chepkunas2001spectral,
author={Chepkunas, L.S. and Rogozhin, E.A. and Benikova, V.I.},
title={Spectral characteristics of foreshocks preceding major earthquakes of the Kurile-Kamchatka Arc and their application to the prediction of the main shock time},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={2001},
pages={235-245},
volume={3},
issue={3},
}