TY - RPRT TI - GEOS seismograms recorded for aftershocks of the earthquakes of December 7, 1988, near Spitak, Armenia SSR, during the time period 26 December 1988 14:00 through 29 December 1988 (UTC) PY - 1989 DO - 10.3133/ofr89163c UR - https://pubs.usgs.gov/publication/ofr89163C ID - ofr89163C ER -