Four months after it began, the underwater volcanic eruption off El Hierro Island persists. This natural-color satellite image, collected on February 10, 2012, shows the site of the eruption, near the fishing village of La Restinga. Bright aquamarine water indicates high concentrations of volcanic material. Immediately above the vent is a patch of brown water that can resemble a turbulent hot tub when the eruption is strongest. The video of the eruption shows the activity in more detail.
This image was acquired by the Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite. The eruption is just off the southern coast of El Hierro, the youngest of the Canary Islands. El Hierro is about 460 kilometers (290 miles) west of the coast of Morocco and Western Sahara.
According to El Hierro Digital measurements of the sea floor by the Instituto OceanogrÃ¡fico EspaÃ±ol showed that the volcano’s summit is now only 120 meters (390 feet) beneath the ocean surface—10 meters (30 feet) higher than it was in mid January. The height of the erupting cone is about 210 meters (690 feet) from the former ocean bottom, with a total volume over 145 million cubic meters (512 million cubic feet) of new material.
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- El Hierro Digital. (2012, February 14). El IEO ha establecido la profundidad de la cima del cono principal de la erupciÃ³n submarina en 120 metros Accessed February 14, 2012.
- Instituto OceanogrÃ¡fico EspaÃ±ol. (2012, January 20). El cono volcÃ¡nico de El Hierro se encuentra a unos 130 metros de profundidad. Accessed February 14, 2012.