critical issues

Interactive database for geologic maps of the United States

The U.S. Geological Survey hosts the National Geologic Map Database (NGMDB). This interactive tool serves as a national archive for high-quality, standardized geologic maps created by the U.S. Geological Survey and state geological surveys.

The MapView section of the NGMDB displays geologic maps from across the country dating back to 1879. The database is searchable by address, and results can be narrowed further using scale and date filters.

Interactive database for topographic maps of the United States

The U.S. Geological Survey hosts topoView, an interactive database of the survey’s topographic maps.

The map is searchable by address, and clicking on any point on the map brings up topographic maps of the area dating back to 1879. Map results can be narrowed further using scale and date filters.

Clicking the “show” option will overlay the selected map onto the coordinates of topoView’s base map. Adjusting the map overlay transparency allows comparison of historical and present-day topography.

All maps in topoView are downloadable in multiple formats.

Interactive map of California earthquake hazard zones

The California Geological Survey’s Earthquake Hazards Zone Application (EQ Zapp) is an interactive map that details the risk of earthquakes and related hazards for different areas of the state.

The map is searchable by address, and it maps three main hazard zones:

  • Fault zones
  • Landslide zones
  • Liquefaction zones

The map also displays areas that have not yet been evaluated for liquefaction or landslides.

Click here to access the interactive map.

Interactive map of permitted oil and gas wells in Florida

The Florida Geological Survey hosts an interactive map of permitted oil and gas wells in the state.

Information is searchable by address, and sites are organized into the following categories:

  • InjectionProducer
  • Saltwater Disposal
  • Plugged & Abandoned
  • Dry Hole
  • Junked
  • Never Drilled
  • Temporarily Abandoned

Clicking on a specific site gives information such as the well field name, operating company, and permit number. Data sets can be downloaded for further use and analysis.

New Database Enhances Access to Geological Survey Publications

Lava erupting from fissures at Bárðarbunga Volcano, Iceland. Image Credit: Peter Hartree, CC BY-SA 2.0, Bárðarbunga Volcano, September 4 2014

The American Geosciences Institute (AGI) has launched a new online resource, the Geological Surveys Database, to support the public discovery of a critical source of reliable geoscience information. This new database provides a state-of-the-art portal for decision makers and others to search and discover state geological survey publications and U.S. Geological Survey factsheets.

Which states are the largest producers and consumers of coal?

Coal Production

In 2017, the U.S. produced over 774 million short tons of coal1.  Coal in the U.S. is produced in three broad regions: Appalachian (Alabama, Eastern Kentucky, Maryland, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia), Interior (Arkansas, Illinois, Indiana, Kansas, Louisiana, Mississippi, Missouri, Oklahoma, Texas, Western Kentucky), and Western (Alaska, Arizona, Colorado, Montana, New Mexico, North Dakota, Utah, Washington, Wyoming).

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