A peculiar event from 1846, involving a significant tremor felt in the Argentine towns of Navarro, Lobos, and Chivilcoy, has been recounted through the writings of renowned physician Francisco Javier Muñiz. The earthquake reportedly caused alarm amongst the *gauchos*, the traditional horsemen of the Pampas region. Details of the event were recently brought to light through Muñiz’s historical records. The quake’s impact on the sparsely populated area at the time is now being re-examined by historians. The account provides a rare glimpse into 19th-century life and natural occurrences in the Argentine countryside. Muñiz’s documentation offers valuable insight into the immediate reactions and experiences of those who lived through the seismic activity.