A Red Alert has since been issued by local authorities for the town of La Restinga, the southern-most village in the Canaries.
A notice posted on the Emergencia El Hierro website today stated: “Phase pre-eruptive. It involves the initiation of a preventive evacuation. Make yourself available to the authorities.”
Scientists on a reconnaissance flight over the sea south of the island have spotted dead fish floating on the surface 3 miles (5 km) from the coast in an area where lower seismic activity occurred on October 9.
Undersea volcanic activity is believed to now be occurring at a depth of 600 metres (1/3 mile) below sea level, in the Las Calmas sea.
Efforts are underway to determine if the subsea volcanic vent is widening and if so, whether it is widening away or toward El Hierro.
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Thanks to Peter Lamb for this link