Inversion of long-period, teleseismic body waves for the Loma Prieta earthquake yields a nearly double-couple moment tensor corresponding to an oblique mechanism with strike 130¿, dip 73¿ and rake 146¿. The long-period centroid depth of the source is 18 km, and the seismic moment is 2.8¿1019 Nm. The source time history consists of two pulses with a total duration of 8--9 sec. Preliminary forward modeling of broad-band, teleseismic body waves indicates the occurrence of at least two sub-sources. Constraining the fault orientation to the long-period inversion result, the first source was located at 18 km depth, and the second source was located updip at about 14 km depth. The second source has a seismic moment 2.7 times that of the first, and occurred 2.0 sec after the first. The precise location of the second source will require further modeling. ¿ American Geophysical Union 1990