This picture from NASA's Earth Observatory shows how much land in California's Central Valley is sinking, due primarily to the drawing of groundwater during periods of drought.
Heavy rains have fallen on many parts of the state this winter, but the image above is a reminder of the lingering effects of drought, even in wetter times.
As the legend at the bottom of the picture suggests, the yellowest areas are those with the greatest degree of subsidence (the term for sinking land) and the bluest areas are those with the least.
As might be expected, the largest degree of subsidence occurred in southern California where the drought struck the hardest. In some places, the land sunk by nearly 30 feet.
California's Department of Water Resources commissioned NASA's Jet Propulsion Laboratory to collect and analyze satellite data during the state's most recent drought, resulting in an initial report in 2015, and subsequent updates. The most recent shows land continued to sink since 2015, at a rate of as much as 2 feet per year in the worst spots.