Mary Anna (17 May 2012)
"The submarine eruption of El Hierro Island (Canary Islands) in 2011-12: 5 small earthquakes on 12 May"

 
http://www.volcanodiscovery.com/el-hierro/submarine-eruption-2011.html

The submarine eruption of El Hierro Island (Canary Islands) in 2011-12: updates
5 small earthquakes on 12 May
Update Mon 14 May 18:42

A slight increase of seismic activity has been noted recently. On 12 May, 5 small quakes occurred in the western part of the island at depths of 2-17 km. It is unlikely that this is a precursor of a new eruptive phase, but rather reflects residual magma movements and minor tectonic adjustments at the recently emplaces dikes beneath the island.