4.9-magnitude earthquake right between NE Greenland and Svalbard, March 30, 212

I have no idea how often this happens:

4.9-magnitude earthquake right between NE Greenland and Svalbard

MAP

4.9

2012/03/30 11:19:20

GREENLAND SEA Location 79.942°N, 0.985°E Depth 9.9 km (6.2 miles)

10-degree Map Centered at 80°N,0°E

http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/10/0_80.php