Mount Yasur
- Estimated Date: Constantly Since 1774 CE
- Location: Republic of Vanuatu
- VEI Rating: 1 to 3
The Mount Yasur Volcano can be found on the Tanna Island of the Republic of Vanuatu, found in the South Pacific Ocean. The volcano stands 1,184 feet high above sea level. It’s a largely unvegetated pyroclastic cone with a beautiful circular crater at the summit that measures out to 400 meters in diameter. Another stratovolcano, Mount Yasur was actually formed when the Indo-Australian plate moved eastward while being subducted under the westward-moving Pacific Plate. Since its formation, it has erupted many times. Today we know it has been erupting constantly since around 1774 CE, the longest constant eruption cycle in history.