On a tranquil Sunday morning, the inhabitants of Johannesburg’s East Rand were rudely awakened by an abrupt tremor. The Council for Geoscience (CGS) confirmed that a local magnitude 4.4 earthquake had occurred on the South African Seismograph Network (SANSN). The center of this seismic event was near Boksburg, several kilometers from the East Rand Proprietary Mine (ERPM).