USGS Multimedia Gallery for Video Tag: geophysics http://gallery.usgs.gov/ en-us A list of the latest videos and animations added to the U.S. Geological Survey's Multimedia Gallery (http://gallery.usgs.gov). http://gallery.usgs.gov/images/USGS.gif USGS http://gallery.usgs.gov/ <![CDATA[Scanning Earth's Subsurface for Groundwater]]> USGS scientists use heliborne electromagnetic (HEM) survey to scan the Earth's subsurface in search of groundwater.

Transcript available soon.

]]> rmcleod - at - usgs.gov (Rachael McLeod) http://gallery.usgs.gov/videos/127 http://gallery.usgs.gov/videos/127 Thu, 20 Aug 2009 00:00:00 EST groundwater GlacialTill HEM heliborne electromagnetic survey geophysics helicopter bird <![CDATA[The Mississippi embayment — a look underground]]> Water, oil, and gas wells (shown as green lines) are drilled to hundreds or thousands of feet below land surface in an area known as the Mississippi embayment. Information gathered from these wells was used to create a 3D computer model of underground formations. Many of these formations (shown as shades of grey, blue, brown, or tan surfaces) consist of layers of sand and clay. These formations are important because they contain ground water that can be pumped out of the ground and used for anything from drinking water for public supplies to irrigation water for crops to washing, cooling, or transporting products in industrial settings. With the ever increasing demand for water and concerns about availability and sustainability, visual tools such as this are important and helpful.

]]> brclark - at - usgs.gov (Brian Clark) http://gallery.usgs.gov/videos/79 http://gallery.usgs.gov/videos/79 Tue, 16 Dec 2008 00:00:00 EST water GroundWater water availability geophysics aquifer framework ScienceVis