Images

This photo was taken by USGS seismologist Susan Hough two months after the magnitude-7 earthquake struck Port-au-Prince on Jan. 12, 2010. Dr. Hough traveled to Haiti with USGS colleagues Doug Given, Mark Meremonte, and J. Zebulon Maharrey to install seismometers, which monitor the earth's movement and can detect and measure aftershocks.

Bighead carp are a large and troublesome invasive species from Asia found in the great rivers of the central United States.

Silver carp are a large a troublesome invasive species from Asia found in the great rivers of the central United States. Silver carp have been observed to jump in response to rocks thrown in the water, passing trains, geese taking off from the water, or just when they unexpectedly find themselves in a tight place.

African rock pythons are the largest snake in Africa, but now some have been found in Florida. They can eat goats, warthogs, and even crocodiles. In Florida, they are an invasive species.

USGS biological sampling trap collecting emerging insects to determine the quantity and quality of insects as potential food resources available to insect-eating birds.

This aerial view shows how Faka Union Canal (visible as a straight channel of water) connects the coastal environment, where manatees feed, to freshwater inlets. The Ten Thousand Islands region in the foreground supports sea grass beds where manatees feed.

A manatee feeds on sea grass beds in Ten Thousand Islands region of Florida.

Image of the silica cell wall of the diatom 'Didymosphenia geminata' from Rio Espolon, Chile. The sample was collected early in 2010 from an extensive bloom on the river. The image has been processed to show the silica cell wall, removing the organic cell contents and the stalk
material.

Chandeleur Islands moderate waves weather scenario.

Ship Island tropical storm weather scenario.

You may notice a green, red or brown film on your favorite boating or swimming area in the summer. This coloring could mean that the water is affected by harmful algal blooms. Harmful algal blooms are an accumulation of tiny organisms known as algae and can release harmful toxins into the environment. Pictured here is Lake Dora, FL, covered in algal blooms.

USGS researchers at work at Shark River, Everglades National Park.

This photo shows a landslide that deposited disaggregated limestone fragments in river valley.

A Landslide dam located 15 km northwest of Jacmel. The dam has breached and should pose no future hazard.

A clear, conical trap collects emerging aquatic insects on Navigation Pool 8 of the Upper Mississippi River for a USGS study examining the effects of Asian carp on insect-eating birds.

View of lava dripping into the ocean on the western edge of the 'Ili'ili ocean entry delta.

By August 17, the breakout which started on August 16 had reached the end Highway 130. The flows, however, had slowed considerably and were making little forward progress.

Mudflats (open water in background) derived via erosion and habitat conversion from former mangrove forests often have a band of mangroves adjacent to the creek bank.  Here a researcher accesses a mudflat at high tide to make measurements.

View looking southwest across the Kalapana Gardens subdivision toward the ocean entries in the background. The slightly lighter-colored surface just past the houses and topped by burned trees marks the area recently covered by lava.

Close-up view of the Puhiokalaikini entry.

Close-up view of the 'Ili'ili entry.