The central Alaska earthquake swarm of October 1947

The earthquake swarm of October 1947 is discussed. Investigation of the activity is described. Intensities in the epicentral region are estimated and an epicenter at Lat. 64° .2N, Long. 149°.0W is assigned. The assigned epicenter of the 1937 swarm is investigated and found to be essentially correct. Photographs of earthquake activity are included along with an isoseismal map and a plot of epicenters.