Tenerife officials urge residents to remain calm as an unprecedented rumbling is detected beneath the holiday island's massive volcano, Mount Teide. The tremors, which lasted for an hour on Tuesday, have sparked concern among locals and tourists alike. However, scientists have assured the public that there is no immediate risk of an eruption. Despite this, they have pledged to remain vigilant and will reassess the situation at their next meeting on Thursday. The rumbling is believed to be caused by vibrating fluids, such as magma, deep beneath the surface. While it cannot be felt without specialist equipment, experts say it indicates that Tenerife is a volcanically active island. The last eruption on Tenerife occurred over a century ago, and the local government plans to stage emergency drills in the towns of Guía de Isora and Santiago del Teide to prepare for any potential future events. These drills will focus on teaching residents how to use emergency equipment and updating their emergency and self-protection plans. While the situation remains calm for now, the authorities are taking no chances, and the public is urged to remain informed and prepared.