Aurorae occur in both the Northern and Southern Hemispheres. In the Northern Hemisphere, the display is known as the aurora borealis, or northern lights. In the Southern Hemisphere, it is called the aurora australis, or southern lights. The term aurora polaris, polar lights, is a general name for both. Aurorae are usually visible from within the Arctic or Antarctic circles - Antarctica, Greenland, Iceland and Northern regions of Canada, Alaska, Scandinavia and Russia. During times of more intense activity on the Sun, auroral storms can be viewed at lower latitudes such as northern Scotland and most of Norway, Sweden and Finland. Very rarely displays can be seen from northerly parts of Europe and the United States.