NASA is funding missions looking near and far to understand planets. One such study issued by scientists at Virginia Tech’s Earth Observation and Innovation (EOI) Lab, who used satellite data and ground-based GPS sensors, shows some ongoing changes here on planet Earth.
In reference to this study, NASA noted:
…the team reported that more than half of infrastructure in major cities such as New York, Baltimore, and Norfolk is built on land that sank, or subsided, by 1 to 2 millimeters per year between 2007 and 2020. Land in several counties in Delaware, Maryland, South Carolina, and Georgia sank at double or triple that rate. At least 867,000 properties and critical infrastructure including several highways, railways, airports, dams, and levees were all subsiding, the researchers found.
The study notes a number of reasons for these changes, including the after effects from the last ice age, man-made dams, and efforts to pump water back into aquifers. For example, in the case of Charleston, South Carolina, which is one of the fastest sinking cities on the East Coast, groundwater pumping is though to be the primary cause of this elevated rate of sinking.
This gives new meaning to the idea of keeping your eyes on the heavens, but also watching where you are stepping.
Our Awesome Universe 