Ben van der Pluijm, a scientist at the University of Michigan, told Express.co.uk: “The November 30 quake was quite large, so lots of associated aftershock activity is expected, as we are indeed seeing. South Alaska's plate convergence zone hosted of one of largest megathrust quakes in history. Recent activity is reminder that it's a matter of time for large quakes (M7+) to shake this very active region (when, not if).
The quake centred on Anchorage, the US state’s largest city, destroying buildings and roads and causing widespread panic on November 30.
The November quake followed others on January 23 and August 12 measuring 7.9 and 6.4 respectively, the first entered on Kodiak Island and the second on Kaktovik.
In total, there have been more than 50,000 quakes so far this year, the first time the landmark figure has been reached in south Alaska.
The situation is so severe mental health charities have complained of being inundated by requests for help for people anxious at the prospect of more earthquakes in the days and weeks to come.