Earthquake movement

Earthquake movement

 

On 24 August 2014, an earthquake of magnitude 6.0 struck in California’s Napa Valley. By comparing radar images made with the Sentinel-1A satellite on 7th and 31st August, we can see the ground movement due to the earthquake. Here the data form an interference pattern. Each cycle of colour represents a surface deformation of 28mm. The largest deformation is about 10cm, and an area of about 30km by 30km is shown to have been affected. The brownish areas are water in San Pablo Bay. The line of the fault that ruptured during the earthquake is seen clearly, a fault that was previously not considered vulnerable. This technique is useful in developed countries, but invaluable in developing countries and remote locations to assess the areas in greatest likely need of assistance.

Image © Copernicus data (2014)/ESA/PPO.labs/Norut/COMET-SEOM Insarap study 

 

Light Works Logo small