Over the past decade, several coastal communities in southeast Florida have experienced a significant increase in flooding frequency. In a recent project, funded by the state of Florida, we monitor coastal subsidence in southeast Florida using GPS and InSAR observations, in order to evaluate the contribution of local subsidence to the increased coastal flooding hazard.

Mexico City, a large megacity with over 21 million inhabitants, is exposed to several hazards, including land subsidence, earthquakes, and flooding. Our data makes it plausible for an earthquake triggering case that temporarily accelerated the subsidence rate in the metropolitan area as a result of the September 2017 earthquakes that affected Mexico City. Furthermore, the triggering effect induced rapid slip along previously developed shallow faults associated with subsidence.

Differential subsidence produces damage to infrastructure and geological media. However, detecting and mapping differential subsidence at a regional scale using satellite date becomes challenging when considering the large amount of displacement products that can be produced. Here we show some examples of our work with products at different scale and focused on different aspects of differential subsidence.