the north east coast of Africa...it looks like these have been
the prelude to a volcanic eruption of a volcano in the area.
Volcanic plume

The swarm of earthquakes
MAP 4.5 2011/06/12 21:37:14 13.234 41.806 15.0 ERITREA - ETHIOPIA REGION
MAP 5.7 2011/06/12 21:03:23 13.530 41.625 9.9 ERITREA - ETHIOPIA REGION
MAP 5.7 2011/06/12 20:32:41 13.460 41.688 10.1 ERITREA - ETHIOPIA REGION
MAP 4.8 2011/06/12 19:44:16 13.369 41.644 9.9 ERITREA - ETHIOPIA REGION
MAP 4.7 2011/06/12 19:37:43 13.316 41.611 10.1 ERITREA - ETHIOPIA REGION
MAP 5.0 2011/06/12 19:21:45 12.476 41.748 10.0 ETHIOPIA
MAP 4.5 2011/06/12 18:01:19 12.817 41.933 10.1 ETHIOPIA
MAP 4.7 2011/06/12 17:47:21 13.538 41.588 10.0 ERITREA - ETHIOPIA REGION
MAP 4.8 2011/06/12 17:18:10 13.381 41.764 9.9 ERITREA - ETHIOPIA REGION
MAP 4.3 2011/06/12 16:33:12 13.507 41.722 10.0 ERITREA - ETHIOPIA REGION
MAP 4.8 2011/06/12 16:24:44 13.436 41.682 10.0 ERITREA - ETHIOPIA REGION
MAP 4.7 2011/06/12 16:12:03 13.397 41.734 10.0 ERITREA - ETHIOPIA REGION
MAP 4.5 2011/06/12 16:09:30 13.443 41.696 2.9 ERITREA - ETHIOPIA REGION
Strongest ones being 5.7

More info here: http://earthquake-report.com/2011/06/12 ... -ethiopia/