Glenn Herbert wrote:You can build an earthbag dome and it will probably be strong and hurricane-resistant, but unless it is reinforced with steel according to professionally-calculated designs, it is likely to collapse in an earthquake and kill anyone inside. Concrete mixed with the soil will make it stiffer, but steel to tie it together is the only way to guard against the bags slipping and falling in strong shaking.
Go ahead and build a small dome to test, and see what it feels like inside in your climate. It may be more liveable than the local standard, or it may be less, I don't know. How much have you studied earthbag domes? What references do you have for safe dimensions, slopes, thicknesses, etc.? Do they consider earthquake resistance at all?
Ash Medai wrote:In my readings on earthbag construction (or other masonry) and earthquake resistance, is the use of wire mesh (chicken wire) on both the inside and outside of the structure, and connected between the walls.
The wire needs to be pulled tight to prevent motion of the masonry or eathbags. When properly applied, this method far exceeded the california earthquake testing equipment. That said, Im not an engineer and cannot educate you on the proper way to build. I mention this to give you a starting point for your own research. Please consult a professional engineer in such a high danger area.