Before and After Images

This breach on Portsmouth Island in North Carolina was likely formed by sound-side flooding caused by Hurricane Dorian. The dunes are intact and a steep bank can be seen on the back side of the dunes, indicating to experts that the process of erosion and inundation came from the sound rather than the ocean.

A breach located at Old A1A beach in St. Augustine, Florida, which first opened during Hurricane Matthew, re-opened during Hurricane Dorian due to elevated water levels and large storm waves that overwashed and flooded a low-lying section of the coast.  The predicted probability of inundation was 60 percent for this location.

An area of previous overwash in Core Banks in North Carolina was completely eroded during Hurricane Dorian. The beach likely experienced erosion and overwash during the approach of Dorian, and then a large storm surge from the sound side after Dorian’s eye passed over.

TNMCorps Mapping Challenge: City/Town Halls in PA, NJ, & NY as of 9/26

TNMCorps Mapping Challenge: Schools in Wayne Co, MI as of 10/03/19

TNMCorps Mapping Challenge: Schools in Wayne Co, MI as of 9/26/19

TNMCorps Mapping Challenge: Status of City/Town Halls in PA, NJ, & NY

TNMCorps Mapping Challenge: Status of Schools in Wayne Co, MI

The Lake Meredith National Recreation Area takes its name from the eponymous water body it encircles. It was declared a National Recreation Area on Nov. 28, 1990, and sometimes sees more than a million visitors a year from nearby Amarillo and beyond.

This year is the 150^th Anniversary of John Wesley Powell’s expedition to explore the Colorado River, a 1,450-mile long waterway that runs through the Western United States and into Mexico.

For centuries, people living in what is now the Netherlands have used various strategies to control water levels in the low-lying country. Beginning in 1932, Dutch engineers created a series of dikes to drain water from an inlet of the North Sea called the IJsselmeer. The reclamation increased the land area of the Netherlands that could be used for agriculture.

The summer of 2019 has been marked by wildfires across the Arctic. Millions of square miles have burned or are burning in the U.S.

The northern reaches of the Greenland Ice Sheet typically stay below the freezing point year-round. In summer, some melting near the coast is not unusual, but the extent of melting this summer was rare.

These infrared satellite images were collected on May 24, 2019 over the Washington, D.C. area.

Before / after image showing transportation features (before image) and structures / orthoimagery features (after image) from a 3/7/19 US Topo map.

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

A landscape at Whiskeytown National Recreation Area 2 months and 9 months after summer 2018's Carr Fire near Redding, California, where USGS WERC researchers are studying fire impacts, post-fire vegetation recovery, and post-fire erosion and debris flows.

The most cratered landscape on Earth is a Nevada desert called Yucca Flat. The craters are the remnants of decades of nuclear tests conducted by the United States since early in the Cold War.

The Missouri River experienced severe flooding in 2011, but flooding in 2019 has been more extensive. The first image, from Landsat 5, shows flooding in June of 2011.