The Virginia Department of Mines, Minerals, and Energy provides a large amount of information on Virginia's geology and natural resources in interactive map form, including:

• Surface geology
• Geothermal suitability
• Sinkholes
• Water wells
• Mineral resources and mining operations
• Topographic maps and aerial imagery

The map allows users to select multiple layers that can be overlain on each other. By doing this, users can see how different features are related.

The Pennsylvania Geological Survey's PaGEODE online tool provides an interactive map of the geology and natural resources of Pennsylvania, including:

• Surface and bedrock geology
• Earthquakes
• Karst features
• Coal, oil, and gas resources
• Sites of notable geologic interest
• Street and topographic maps, and aerial images

The map allows users to select multiple layers that can be overlain on each other. By doing this, users can see how different features are related.

The Oregon Department of Geology and Mineral Industries statewide geohazard viewer, HazVu, provides a way to view a range of geohazards in the state of Oregon,including:

• Earthquakes - active faults, historical epicenters, expected shaking, and liquefaction hazards
• Tsunami inundation hazard
• Volcanoes
• Landslides - historical landslides and landslide susceptibility
• Floods
• Coastal erosion

The map also includes public buildings so that hazards can be assessed for these locations.

The Ohio Department of Natural Resources Division of Geological Survey provides an interactive map of earthquake epicenters and magnitudes for past earthquakes in Ohio. For each earthquake, users can click on the symbol to find out specific information and access a full earthquake report. The map also uses star icons to indicate the location of seismic stations throughout Ohio. By clicking on the star icon, users can learn more about where the seismic station is housed and who the designated contact is for each station. 

The New Jersey Department of Environmental Protection's GeoWeb Map Viewer provides a large amount of information on New Jersey's geology, natural resources, and environmental management in interactive map form, including:

The Kentucky Geological Survey's interactive map provides a large amount of information on Kentucky's geology and natural resources in interactive map form, including:

The Delaware Geological Survey's interactive map of Delaware earthquakes shows the location and magnitude of all recorded earthquakes in Delaware. Users can modify the map based on earthquake magnitude, Mercalli intensity, or area.

Click here to access the Delaware Geological Survey's map of Delaware earthquakes

Source: Delaware Geological Survey

The U.S. Geological Survey's WaterWatch program maps below-normal 7-day average streamflow, identified through comparison to historical streamflow readings, to produce their DroughtWatch map. The map identifies drought conditions ranging from extreme hydrological droughts to below normal streamflow conditions across the entire U.S.

Click here to use the DroughtWatch interactive map

Source: U.S. Geological Survey WaterWatch

The U.S. Geological Survey's Volcanoes and Current Activity Alerts map shows the location and activity levels of all volcanoes in the United States. The map allows for filtering based on both location and current volcano status. Each volcano is depicted by a small colored triangle with different colors indicating various volcano alert levels:

• Green = normal
• Yellow = advisory
• Orange = watch
• Red = warning

Users can click on individual volcanoes to see that volcano's page on the USGS website.