El Hierro volcano, Canary Islands: powerful earthquake swarm without earlier comparison, eruption warning
Unusually strong earthquake swarm under El Hierro Island continued today on Canary Islands. A record number of quakes, more than 240, were recorded on June 26, 2012 (most of them larger than M2 and 6 larger than M3), all were at about 18-20 km depth. Since tremor set