Mauritius and its outer islands are of volcanic origin, formed by underwater volcanic activity millions of years ago. However, the volcanic activity that created these islands has long been dormant. There is no record of any recent volcanic eruptions in Mauritius or its dependencies, including Rodrigues, Agalega, and the Cargados Carajos Shoals. Mauritius and its outer islands do not currently face a risk from volcanic eruptions. The islands' volcanic past is an important aspect of their natural history and landscape, but it does not pose a threat to residents or visitors in terms of active volcanism.
Volcanic History and Current Status
- Formation Period: The islands of Mauritius and Rodrigues are part of the Mascarene Islands, which were formed by a series of volcanic eruptions between 8 and 10 million years ago. The last known eruptions believed to have occurred on Mauritius itself are estimated to have ceased around 25,000 years ago.
- Dormant Volcanoes: The main island of Mauritius is home to several dormant volcanoes, including Trou aux Cerfs, the most famous, which is a dormant volcanic crater located in Curepipe. Other remnants of volcanic activity include the basaltic mountains scattered across the island, which are now covered with lush vegetation and no longer active.
- Current Geological Activity: There is no current volcanic activity on Mauritius or its outer islands, and they are not located near any major tectonic boundaries that would typically present ongoing volcanic threats. The seismic activity in the region is also low, contributing to the low risk of volcanic eruptions.
Risk Assessment
- Low Risk of Eruption: Given the geological history and long period of dormancy, the risk of volcanic eruptions in Mauritius and its outer islands is considered extremely low. The existing volcanic features are of significant interest for educational, scientific, and tourism purposes but do not pose a hazard in terms of eruptions.
- Monitoring: While there is no immediate risk of volcanic activity, geological features are periodically studied as part of the island's natural heritage and scientific research. These studies help confirm the dormant status of the volcanic sites.
