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Variance image of Isla Verde in San Juan, Puerto Rico, from a coastal video monitoring station. Image is compiled from 10 minutes of video and shows areas of more movement as brighter colors.

Dark image of Isla Verde in San Juan, Puerto Rico, from a coastal video monitoring station. Image is compiled from 10 minutes of video and tracks the darkest pixels through 10 minutes of motion.

Time-exposure image of Isla Verde in San Juan, Puerto Rico, from a coastal video monitoring station. Image is time-averaged over 10 minutes of video.

September 19, 2018 USGS photo of the south caldera of Kīlauea Volcano showing the main collapse area. The south Sulphur Bank is in the left side of the photo. Uēkahuna Bluff, from where this photo was taken, cuts across the bottom and lower right corner of the photo. After the collapse of 1868, the caldera floor may have looked something like this.

A well sensor continuously monitors salinity, temperature, and water level in a salt marsh, Cape Cod, MA

Image from video camera along Sunset State Beach in Watsonville, CA, looking northwest. Every half hour during daylight hours, the camera shoots video for 10 minutes.

USGS scientists collect sediment cores to examine the amount and distribution of metals within Lake Powell.  

In this photo, a small unoccupied aicraft (sUAS) or drone is being prepared to collect thermal infrared data to assess groundwater discharge into Las Vegas Wash, in Clark County, Nevada. The umbrella provides shade to keep the equipment from getting too hot.

USGS Earth Resources Observation and Science (EROS) Center scientist Kristi Sayler speaks to participants in a November 2018 workshop on Land Change Monitoring, Assessment, and Projection in Sioux Falls, SD. 

USGS Earth Resources Observation and Science (EROS) Center contractor Bruce Pengra presents on LCMAP validation during a workshop in Sioux Falls, SD.

USGS Earth Resources Observation and Science (EROS) Center scientist Roger Auch presents on Land Change in the Piedmont Ecoregion at a November 2018 workshop on Land Change Monitoring, Assessment, and Projection in Sioux Falls, SD. 

Dissolved inorganic carbon (DIC) in water samples is measured with a UIC, Inc. Coulometer

Gamma well detectors are used to determine the ages of sediments based on activities of natural and anthropogenic radionuclides

Group photo of participants in a November 2018 workshop on Land Change Monitoring, Assessment, and Projection at the Earth Resources Observation and Science (EROS) Center in Sioux Falls, SD. 

South Dakota State University Extension Office Senior Ag Research Technician Brad Richardson uses the LCMAP Timeseries Analysis and Plotting Tool (TAPTool) at the USGS Earth Resources Observation and Science (EROS) Center in Sioux Falls, SD. 

USGS Earth Resources Observation and Science (EROS) Center contractors Suming Jin, Patrick Danielson and Kelcy Smith use the LCMAP Timeseries Analysis and Plotting Tool (TAPTool) during a November 2018 workshop in Sioux Falls, SD. 

Map depicting the bounderies of the New Jersey Pinelands Management Areas

Sulfur dioxide and hydrogen sulfide gases themselves are not visible, but dramatic plumes are sometimes visible at Kīlauea Volcano's summit (shown here) and Pu‘u ‘Ō‘ō.

USGS Earth Resources Observation and Science (EROS) Center scientists Heather Tollerud, Terry Sohl, Jennifer Rover and Jon Dewitz use the LCMAP Timeseries Analysis and Plotting Tool (TAPTool) during a November 2018 workshop on Land Change Monitoring, Assessment, and Projection in Sioux Falls, SD.