Maps!
The Washington State Geothermal Maps, North American Map (courtesy of SMU Geothermal Lab), and lots more. A great map link is via Idaho National Lab Geothermal Map Page . These links have massive 22MB! map files so you can see up close. For all these (blog friendly) maps double click to enlarge. see other links for references to sources. The great WA State Geothermal Map (3.2MB)
Washington State’s latest
Western U.S. Map
Out of courtesy to our geographic neighbors who are the hot zone
Canada
Alaska is hot?
The 1982 Eastern Washington shallow well gradient map
