The Moderate Resolution Imaging Spectroradiometer (MODIS) acquired these images of the storm on March 18. The top image shows the dust over the Texas Panhandle at 1:15 p.m. Central Daylight Time from the MODIS instrument on NASA’s Terra satellite. The second image, from the Aqua satellite, was acquired at 2:50 p.m. Comparing the two images shows the development of the storm through the day. The differences in color are due to changes in lighting.
The dust in this image originated in New Mexico. The plume stretched across about 175 kilometers (110 miles) in the top image, but was somewhat dissipated a couple of hours later. The large images show dust across a wider area, including a second large dust plume in southern Colorado, Kansas, and Oklahoma.
Globally, dust is one the most abundant aerosols in the atmosphere. Agriculture, drought, and deforestation all increase dust in the atmosphere, though the largest dust storms typically occur over deserts, particularly where there are dried rivers or lakebeds made up of fine soil.