- A few more megawatts will certainly be added at Puna.
- Hard to believe this was two decades ago, but Harry Olson (right) of the Hawaii Natural Energy Institute proposed shallow hole drilling to explore for geo at Hualalai on the Kona side of the Big Island. There was a murmur of interest last year about looking for this resource on ag lands around Hualalai. Mount Hualalai last erupted in 1803, and this remains an active volcano. Yes, there will be a few serious downsides if you worry about worst case scenarios.
- It was a quarter century ago that HNEI also discussed with the Maui Prince (now Makena Resort, which is re-developing--good time to re-visit this option) and landowners up on Haleakala to drill for lower temperature geo-fluids, use Ormat hardware to produce some electricity, but, more so, pipe the hot effluents to the hotel to feature a Hawaiian onset. Haleakala last erupted in 1790 (just upslope of La Perouse Bay, which is that rectangular ocean space next to Makena), and, of course, remains potentially active.
- Oahu? Well, Diamond Head stopped erupting half a million years ago, but there are supposedly 6 hot spots on this island. HNEI in the early 90's negotiated with the U.S. Navy to find geothermal in Lualualei Valley. Still something worthy of exploration.
- Kauai? Not much hope, for the island stopped forming millions of years ago. However, there is something called post erosional volcanic series that does not totally eliminate potential.
- Loihi? Well, the seamount is 22 miles southeast of the Big Island, but 3000 feet below the surface. Underwater geothermal energy? Nah. Scientifically, the movement of tectonic plates over this Hawaii hotspot (where magma emanates from the mantle) has formed the Hawaiian Islands. Hawaii already has an Exclusive Economic Zone twice the size of Texas. In a few million years?
Finally, hot dry rock systems have been suggested as capable of providing a lot more energy than all the fossil fuel deposits available and awaiting discovery!