Abstract: This invention relates to a seismic electric connector assembly which comprises a pair of cooperable plug members. The connector carries a plurality of engageable male and female electric contacts in opposed end faces of the plug members. The contacts are embedded in a resilient, elastic insulator base. The base of each concave contact surface is provided with a linear groove for accepting minute dirt particles therein. Each contact is made up of a head and of a rod frictionally engaged therewith, and a coil spring is mounted on each rod.