Burträsk Fault (Swedish: Burträskförkastningen) is a large geological fault located in Northern Sweden.
The fault had a major period of seismic activity following the deglaciation of Fennoscandia about 10,000 years ago.
[1] Likely extends northeast below sea level into the Bothnian Bay.
[1] The Burträsk fault is one of several postglacial faults in northern Sweden that remain seismically active.
Currently, it is the most seismically active area in the whole of Sweden.