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Location 5: Elevated water levels and high waves overtopped the dunes at Sombrero Beach in Marathon Key causing sand to overwash, covering the road.
Screen shot of the Coastal Change Hazards Portal showing potential coastal change impacts during a direct landfall of Hurricane Irma based on NHC Advisory 41, 0800 AM EDT SEPT 9 2017.
Hurricane Harvey dumped over 50 inches of rain near Houston, leaving extensive flooding throughout the area.
At the USGS EROS Center, we study land change, operate the Landsat satellites, and maintain the longest, continuously acquired collection of images of the Earth's land surface.
USGS EROS Center (https://eros.usgs.gov/)...
Location 1. Elevated water levels during Hurricane Harvey reached the base but did not overtop the ~5m high dunes in Mustang Island, Texas, leading to dune erosion. The predicted probability of dune erosion for this section of coast was 99%.
Location 2. Multiple breaches were cut through the south end of San Jose Island, Texas, just north of Aransas Pass. The predicted probability of inundation was low, only 21%, however the probability of overwash was 87%. When water levels are elevated through several tidal cycles, as was likely the case during Hurricane Harvey, the dunes can continue to erode through time and may even erode...
Locatinon 3. At the north end of Matagorda Island, Texas, storm waves and surge inundated a low-lying section of the coastline causing a 340-meter wide breach. The predicted probability of inundation here was 90%
Location 4. Sand dunes along this stretch of coast in Sargent, Texas, were overwashed by large waves during the storm. Sand from the beach and dunes is covering the roadway behind the dunes and which may be impassable. The predicted probability of overwash in this area was 94%.
Location 5. Erosion of the beach in front of this developed area in Surfside, Texas, occurred as a result of elevated water levels during the storm. The vegetated dune at the bottom of the image was overwashed with sand being moved between and behind the oceanfront homes. The predicted probability of overwash here was 88%.
Along the northeast coast of Puerto Rico, USGS hydrologic technician Francisco Almanzar surveys reference elevation points to ensure the accuracy of water level data. Almanzar and other USGS employees installed nine storm surge sensors along the coast on Labor Day, Monday, Sept. 4, 2017 as Hurricane Irma approached.
SEABed Observation and Sampling System (SeaBOSS) operations were conducted near Stellwagen Bank offshore of Massachusetts in cooperation with the National Oceanic and Atmospheric Administration's Stellwagen Bank National Marine Sanctuary aboard the sanctuary's research vessel, the R/V Auk.
USGS scientists Lisa Ashmore and Lee Bodkin collect water-quality samples on Lake Houston in response to the high flow conditions that resulted from Harvey.
The USGS Earthquake Hazards Program recently released a new strategic plan for earthquake monitoring entitled the “Advanced National Seismic System – Current Status, Development Opportunities, Priorities, 2017-2027.”
U.S. Geological Survey scientists and partners are taking technology to the next level, using unmanned aircraft systems (UAS), commonly called drones, to acquire both fire intensity and emissions data during prescribed burns.
Budget Focuses on Core USGS Science and Efficiency
This EarthWord isn’t a new dance-move; it’s been around since we’ve had tectonic plates...
The frequency and severity of coastal flooding throughout the world will increase rapidly and eventually double in frequency over the coming decades even with only moderate amounts of sea level rise, according to a new study released today in “Scientific Reports.”
Members of the news media are invited to attend the next Earthquake Country Alliance - Bay Area Regional Workshop to be held at the U.S. Geological Survey in Menlo Park on May 23. ECA workshops are educational and informational opportunities to learn more about the latest in earthquake science, preparedness, and mitigation, as well as to arrange interviews with subject matter experts.
Today, in 1980, Mount St. Helens unleashed the most devastating eruption in U.S. history. Two years later, USGS founded the Cascades Volcano Observatory to monitor Mount St. Helens and all the Cascades Volcanoes.
Just like smog and fog, this EarthWord is not what you want to see while driving...
This EarthWord is straight up steampunk...
Which sounds more dangerous, lava or mud? The answer may surprise you...
It’s not just something you run into on a golf course-it’s this week’s EarthWord!
Early on the morning of August 24, 2014, Loren Turner was awoken by clattering window blinds, a moving bed, and the sound of water splashing out of his backyard pool. He experienced what is now named the “South Napa Earthquake.”