Bathymetry of a new-born submarine volcano: El Hierro. Canary Islands

Jesús Rivera, Nuria Hermida, Beatriz Arrese, Daniel González-Aller, Jose L. Sánchez de Lamadrid, Daniel Gutiérrez de la Flor and Juan Acosta

Journal of Maps, 2014, vol. 10, issue 1, 82-89

Abstract: We present here a bathymetric map of a new underwater volcano which began its growth on 10 October 2011 to the south of El Hierro Island (Canary Is., Spain). The map scale is 1:25,000 and the map covers 210.9 sq. km. In July 2011, the seismic monitoring network of Spanish National Geographic Institute (IGN), began to detect an increase in low-intensity earthquakes around El Hierro Island along with ground deformation. This seismic crisis culminated on 10th October with a submarine eruption 2 km south of the small port of La Restinga, and lasted until March 2012 when IGN determined the end of the eruption process. After eight surveys monitoring the morphological and bathymetric evolution during the eruptive phase that ended in March 2012, Spanish Oceanographic Institute and the Hydrographic Institute of the Navy, carried out a survey from the 6th to the 8th of December 2012 to map the bathymetric and morphologic situation after the 2011-2012 eruptive period. The map presented here is based on full seafloor coverage by multibeam swath data echosounder carried out when the submarine volcano was in a quiet phase, using a grid mesh size of 12 × 12 meters.

Date: 2014
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DOI: 10.1080/17445647.2013.849620

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