TY JOUR TI Variations of the total electron content in the ionosphere from GPS data recorded during the Hector Mine earthquake of October 16, 1999, California KW total electron content KW GPS monitoring KW Hector Mine earthquake KW earthquake precursors. JO Russian Journal of Earth Sciences AU , .. AU , .. AU , .. AU , .. AU , .. AU , .. AU , .. PY 2004 IS 6 PB Геофизический центр Российской Академии Наук