The Monongah Mining Disaster occurred on December 6, 1907, in Monongah, West Virginia. It was one of the deadliest coal mining accidents in U.S. history, resulting in the deaths of at least 362 miners. The disaster was caused by an explosion, likely due to a buildup of methane gas and coal dust in the mines operated by the Fairmont Coal Company. The tragedy highlighted the dangerous working conditions in the coal mining industry during that era. In response, it spurred reforms in mining safety regulations and practices, leading to improved safety measures for miners across the country. The disaster remains a significant event in the history of labor rights and industrial safety.