COMPARISON OF IRREGULARITIES IN THE EARTH'S ROTATION AND SOME GEOPHYSICAL DATA IN XYIII-XX CENTURIES. Ekaterina Yu. Aleshkina Institute of Applied Astronomy Zhdanov str., 8 197042 St.-Petersburg, RUSSIA The paper concerns the connection between astronomical and geophisical data - the correlation between irregularities in the Earth's rotation and powerful earthquakes in XYIII-XX centuries. The predicting of earthquakes is a topical practical problem. The investigation of such correlation can make it possible to improve the reliability of this predicting. ========================================================================