Earthquakes near Grindavík and the convection rolls grid

The convection rolls grid over Iceland

This grid can be used for reference, explaining tectonic features of Iceland.

Having a closer look at Reykjanes Peninsula:

Reykjanes Peninsula and the SW part of Iceland
The Icelandic Met Office

The division lines of layer 2 and 4 between 120-410 km below the surface cross the earhquake swarm from SE to NW. A volcanic system and a seismic zone are also found within the area.

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