Erdbebenschwarm Yellowstone Nationalpark

A series of small earthquakes today in YNP:
1.1 2013/04/09 03:39:13 - 29 mi SSE of Gardiner, MT
2.3 2013/04/09 03:35:28 - 29 mi SSE of Gardiner, MT
3.1 2013/04/09 03:33:42 - 29 mi SSE of Gardiner, MT
2.3 2013/04/09 03:30:25 - 29 mi SSE of Gardiner, MT
1.6 2013/04/09 03:24:36 - 28 mi SSE of Gardiner, MT
1.5 2013/04/09 03:23:56 - 29 mi SSE of Gardiner, MT
1.2 2013/04/09 01:27:08 - 29 mi SSE of Gardiner, MT