New Mexico was rattled by two back-to-back earthquakes just five minutes apart, registering magnitudes of 3.6 and 3.1 near the town of Eunice. The tremors occurred along the ancient Alamogordo fault, which is part of the geologically active Rio Grande Rift stretching 600 miles across the region. Experts say the quakes may be tied to natural crust shifts or possibly wastewater disposal from fracking in the area. While no damage or injuries were reported, over 1,500 residents felt the shaking, and aftershocks are expected. The USGS has warned that the region, prone to tectonic stress, should remain alert to future seismic activity.