Part of the addition to our house on our new property is planned to be an earthbag construction. Because the house is in a floodplain and an area with (now) frequent earthquakes, however, I need data to support the claims of flood resistance and earthquakes standards. Hear me please, I KNOW that this construction is a sound method but I may have to prove it to a committee of locals who are steeped in mid-America farming values and ideas. All I have to do legally is provide numerical data for flood resistance ie. how well it will handle flood water IF it were to have flood water around it (which is highly unlikely, I might add). Is there a source for these kind of figures?
Hopefully those will give you some ammunition and or places to start your information quest.
Check with the state government, building code to see if there are already state code requirements in place (most states don't have these yet).