<P> The Basin and Range geologic province in Nevada, southeastern Oregon, southwestern Idaho, Arizona and western Utah is now an area of rapid geothermal development . Several small power plants were built during the late 1980s during times of high power prices . Rising energy costs have spurred new development . Plants in Nevada at Steamboat Springs, Brady / Desert Peak, Dixie Valley, Soda Lake, Stillwater and Beowawe now produce about 235 MW . </P> <P> Installed geothermal capacity in megawatts (MW) by state as of February 2013: </P> <Table> <Tr> <Th> State </Th> <Th> Capacity (MW) </Th> <Th> Share of U.S total </Th> </Tr> <Tr> <Td> California </Td> <Td> 2,732.2 </Td> <Td> 80.7% </Td> </Tr> <Tr> <Td> Nevada </Td> <Td> 517.5 </Td> <Td> 15.3% </Td> </Tr> <Tr> <Td> Utah </Td> <Td> 48.1 </Td> <Td> 1.4% </Td> </Tr> <Tr> <Td> Hawaii </Td> <Td> 38.0 </Td> <Td> 1.1% </Td> </Tr> <Tr> <Td> Oregon </Td> <Td> 33.3 </Td> <Td> 1.0% </Td> </Tr> <Tr> <Td> Idaho </Td> <Td> 15.8 </Td> <Td> 0.5% </Td> </Tr> <Tr> <Td> New Mexico </Td> <Td> 4.0 </Td> <Td> 0.1% </Td> </Tr> <Tr> <Td> Alaska </Td> <Td> 0.7 </Td> <Td> <0.1% </Td> </Tr> <Tr> <Td> Wyoming </Td> <Td> 0.3 </Td> <Td> <0.1% </Td> </Tr> <Tr> <Td> Total </Td> <Td> 3,389.9 </Td> <Td> 100% </Td> </Tr> </Table> <Tr> <Th> State </Th> <Th> Capacity (MW) </Th> <Th> Share of U.S total </Th> </Tr>

Where are the majority of identified hydrogeothermal sites in the united states located