Interactive map of earthquakes around the world

The U.S. Geological Survey's Latest Earthquakes viewer shows the locations and magnitudes of recent earthquakes around the world. Users can also search the archives for global earthquakes dating back to the early 20th century. Maps can be generated for specified ranges of time, area, and earthquake magnitude.

Additional layers on the map include plate boundaries, major U.S. faults, and the USGS earthquake hazard forecast map for the United States.

Click here to access the USGS Latest Earthquakes viewer.

Interactive map of dams in Nebraska

The Nebraska Department of Natural Resources provides information about dams in the state in interactive map form. The map shows all dams more than 25 feet high or with a maximum storage capacity greater than 50 acre-feet.

Dams are color-coded according to the potential hazard they pose, with symbols designating existing dams, breached dams, and dams under construction. Specifications are available for each dam, including height, storage capacity, maximum discharge, surface area, and drainage area.

Interactive map of coastal flooding impacts from sea level rise

The National Oceanic and Atmospheric Administration's Sea Level Rise and Coastal Flooding Impacts data viewer provides a preliminary look at how different amounts of sea level rise would affect coastal flooding in the United States.
In addition to overall flooding estimates, users can see the relative social vulnerability of coastal regions; areas currently already subject to coastal flooding; impacts on marshes; and the different levels of confidence with which predictions can be made in different areas.

Interactive map of historical hurricane tracks

The National Oceanic and Atmospheric Administration's Historical Hurricane Tracks tool shows the tracks and characteristics of over 6,000 tropical cyclones around the world dating back to 1842.
In addition to the hurricane tracks, users can explore the category, wind speed, and minimum pressure of each hurricane at different points in its track.
A flexible search feature allows users to search by name, date, region, or specific location.

EARTH: The Most Dangerous Fault in America

When people think of dangerous faults in America, the the San Andreas probably comes to mind first. But another potentially greater threat lurks in the East Bay region of Northern California, just a stone's throw from San Francisco and the tech hub of Silicon Valley: the Hayward Fault. In the June issue, EARTH Magazine guest author Steven Newton lays out just what is at risk, and what to expect when an earthquake strikes on what may be the most dangerous fault in America.

Interactive map of natural hazards and land use in the District of Columbia

The District of Columbia's Office of the Chief Technology Officer makes a huge amount of information available in interactive map form. The DC Atlas Plus map has over 340 layers of publicly available map data on a huge range of topics, including transportation, public facilities, demographics, cultural and social locations, planning and zoning, and geoscientific data. The geoscience layers available include information on:


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