El Hierro on yellow alert
El Hierro is on yellow alert following a new surge of seismic activity.
The decision was taken by PEVOLCA, the Civil Protection Plan for Volcanic Risk, with effect from 8.30pm on March 27th.
Following discussions with the Cabildo, a number of precautionary measures have been taken, including closing a number of roads and access tunnel to part of Frontera.
The measures come after the island experienced an underwater quake which reached 4.6 on the Richter scale. This is the highest recorded throughout the whole 2011/2012 phenomenon which saw an ocean eruption and gas plumes.
The quakes were felt on La Palma and La Gomera and caused some rock-falls on the steep slopes of Frontera off whose coast the tremors happened. At one stage, there were three in 30 minutes registering 3.7, 3.9 and 3.7 again.
The seismic activity is being closely monitored but experts are saying there is no cause for concern and they do not believe there is a risk of an eruption