The Eruption and the Land Rush
Prior to the eruption of Sunset Crater, the vast area from the San Francisco Peaks to the Little Colorado River was sparsely inhabited due to scarcity of rainfall for raising crops. A few families were scattered along the base of the peaks where abundant snow and frequent summer rains made farming possible.
Between 1046 and 1071 A. D., or almost 1,000 years ago, there were rumblings in the valley at the foot of the peaks. Earth lodges abandoned by the frightened Indians decayed into ruins. Then came the eruption of what is now Sunset Crater. Huge clouds of volcanic cinder or ash buried remains of the homes and spread a black mantle over more than 800 square miles of territory between the mountains and the river.
While this was probably regarded as a great catastrophe at the time, some of the Indians soon discovered it was possible to raise corn where plants previously had shriveled and died from lack of water. The fine layer of cinder over the soil formed a mulch which absorbed moisture from the scanty rain and snow. Gradually news of this new farming land filtered out over the Southwest. The land rush was on.