There are two major faults in SoCal. There is the well-known San Andreas, which runs roughly north-south east of LA. It goes through/near Indio, Palm Springs, and Palmdale, to give an idea of where it is. Then there is the Garlock Fault, which runs roughly east-west, basically from the San Andreas Fault, on its west end and along the southern end of the Tehachapi mountains.
This quake appears to have been on a smaller fault that is like a branch off the Garlock fault. I doubt this quake was felt very strongly in the Land of LA, because there are several faults between Barstow and the LA area, and even fault dissipates shaking going from Barstow to the Land of LA. It was probably unpleasant in Barstow, with stuff in homes and stores toppled over. Buildings more than a century old might have suffered significant damage.
