Nevada is shaking again — this time with a burst of seismic activity clustered around the small town of Valmy. Over the span of just five hours, the U.S. Geological Survey (USGS) recorded seven earthquakes, the largest a 3.6-magnitude tremor striking just before sunrise at 5:44 a.m. ET.
Though modest in strength, the swarm is a reminder that the Silver State sits atop some of the most restless ground in America. Valmy lies along a stretch of fault systems tied to the sprawling Basin and Range Province — a geologic giant stretching from southern Oregon and Idaho through Nevada and into Arizona and New Mexico. Here, the Earth’s crust is literally being pulled apart.
NASA describes the process bluntly: the crust is thinning, cracking, and breaking into hundreds of faults. Over millions of years, mountains have risen where land was lifted upward, while valleys — or basins — formed where the crust dropped. That tug-of-war has made the Basin and Range one of the nation’s most seismically active regions, capable of producing powerful quakes like the 7.7-magnitude Pleasant Valley event more than a century ago.
The latest tremors were shallow, striking at depths of about five miles. That shallowness means the seismic energy has less distance to travel before reaching the surface, making such quakes more noticeable even at lower magnitudes. For context, quakes under 2.5 are rarely felt.
Those between 2.5 and 5.4 can rattle nerves and shake dishes but typically cause only minor damage. So far, no reports of shaking have been submitted to USGS, underscoring the remote nature of this part of Nevada.
Valmy is better known for its mining than for earthquakes. The nearby Twin Creeks and Turquoise Ridge mines produce significant amounts of gold, and the massive excavation, blasting, and underground water management involved in mining can sometimes contribute to localized seismic jolts.
By changing stress patterns or lubricating faults with injected fluids, mining operations may nudge faults closer to slipping. But experts caution that such human activity is not the root cause of larger quakes — the deeper tectonic forces of the Basin and Range dominate.
And those forces are vast. The crust here is only about 19 to 22 miles thick, stretched laterally by as much as 186 miles since the Early Miocene epoch. It’s that stretching that continues to fracture the region into its iconic pattern of long mountain ranges and parallel valleys — and continues to generate swarms like the one seen this week.
It’s worth remembering that the Basin and Range has a recent history of flexing with far greater force. In March 2020, Utah saw a 5.7-magnitude quake near Salt Lake City, while Idaho endured a 6.5-magnitude shock just weeks later — both tied to the same geologic system.
