The 1873 Alpago earthquake occurred near the Italian city of Belluno on June 29 in the geologically active Alpago Valley of the Veneto region; the zone is rated as two on a four-degree risk scale (one being the highest). The 6.3 magnitude quake was rated as IX–X (Violent–Extreme) on the Mercalli intensity scale. Intensities greater than VII (Very strong) were confined to the provinces of Belluno, Treviso and Pordenone.