Using geoelectric field observation data from stations around the epicenters of the Jishishan M_S .2 and Wushi M_S .1 earthquakes, this study investigates variations in the energy spectral values of the geoelectric field before and after these earthquakes. The results indicate the following: (1) Before the Jishishan M_S .2 earthquake, significant increases in the energy spectral values of the low-frequency components of the geoelectric field were observed at the Wushengyi, Songshan, and Pingliang stations. (2) Before the Wushi M_S .1 earthquake, distinct variations characterized by an initial increase followed by a decrease in the low-frequency energy spectral values were recorded at the Wushi, Wenquan, and Urumqi stations. (3) Preliminary analysis suggests that these observed anomalies were primarily caused by low-frequency electromagnetic radiation generated during focal source preparation and propagation to the stations. However, deformation of subsurface media in the observation areas may also excite low-frequency electromagnetic radiation in local regions—a factor that should not be overlooked.