The magnetic field that is generated by the sound field of a transient acoustic source immersed in electrically conducting fluid in the presence of ambient magnetism is calculated from a recent theory of such ’’sonomagnetic’’ phenomena. A general solution for the sonomagnetic pulse emitted by an arbitrary transient source is derived in terms of the acoustic pressure field directly (as opposed to a less certain source description). For a model pressure pulse, representative of underwater explosion/implosion pulses, the solution is reduced to tabulated functions. The result consists of a sonomagnetic shock plus precursor and relaxation waves, whose properties are discussed analytically and illustrated numerically.