Earthquake in Lochaber
There was an earthquake at approximately 6.30pm on July 3rd, 2014 in and around Fort William. It was 2.9 on the Richter scale or, perhaps more tangibly, on the Moment magnitude scale (Mw) it was somewhere between a large quarry blast and a small atomic bomb.
The image (right) is from the British Geological Survey website, and has a map showing the epicentre of yesterday’s earthquake and distribution of felt reports. The epicentre was about 10km west of Fort William and was 5km in depth.
Did you know that the pattern of earthquake activity in Lochaber may be influenced by the distribution of ice during the last glaciation? The hills were depressed by their burden of ice and when the ice eventually started to melt the hills began to “bounce back up”. This is known as isostatic rebound. This process still happens to this day.