The 2023–2024 Sundhnúkur eruptions are an ongoing series of volcanic eruptions in the Reykjanes peninsula, near the town of Grindavík, Iceland. As of 16 March 2024, there have been four eruptions between December 2023 and March 2024, following an intense series of earthquakes. Although localised, the seismic and volcanic activity have caused significant disruption across the western part of the peninsula.

Southern Peninsula is an administrative unit and part of Reykjanesskagi, or Reykjanes Peninsula, a region in southwest Iceland. It was named after Reykjanes, the southwestern tip of Reykjanesskagi.