Mysterious earthquake swarm hits Nevada near top-secret base used for testing nuclear weapons

A series of mysterious earthquakes has been recorded near one of America's most secretive bases used for nuclear testing. 

Over the last day, the US Geological Survey (USGS) has detected 16 moderate tremors, all stronger than 2.5 in magnitude, in the vicinity of Tonopah Test Range in Nevada, better known as 'Area 52.'

Both Area 52 and its more famous neighbor, Area 51, sit on a massive complex just north of Las Vegas called the Nevada Test and Training Range (NTTR).

For decades, it has been believed that the US military has carried out experimental aircraft testing as well as nuclear weapons research in this remote area.

Now, scientists have monitored over 100 seismic events within 50 miles of the Tonopah Test Range in just the last week.

These earthquakes have ranged from very small shockwaves between 1.0 and 1.9 in magnitude to minor earthquakes stronger than 3.0, which could be felt by anyone at ground level nearby.

The outbreak of earthquake swarms near the nuclear testing site has also come as the US launches a massive bombing campaign against Iran, and President Donald Trump has warned that the 'biggest wave' hasn't even happened yet.

At the same time, the final remaining nuclear weapons treaty between the US and Russia expired earlier in February, just weeks before USGS started picking up this concentrated swarm underground.

The strongest of these recent earthquakes took place Sunday at 11.37am ET when a magnitude 4.3 shockwave rattled a remote point of the Nevada desert roughly 48 miles northeast of Tonopah.

Quakes between magnitude 2.5 and 4.9 typically cause considerable shaking that can be felt by residents for several miles, but no severe damage to buildings or property. No injuries have been reported.

The shockwaves were reported by Nevada residents as far away as Carson City, over 180 miles to the west, and Las Vegas, 175 miles south of Sunday's earthquake.

There has been no announcement from the US government that full-scale nuclear explosive testing has resumed, meaning the earthquakes may be a prolonged stretch of normal geological activity in the region.

The swarms have taken place in an area called the Central Nevada Seismic Zone, a long, narrow strip of land running roughly north-to-south through the middle of Nevada for about 200 to 300 miles.

The Earth's crust has been slowly stretching and pulling apart in this area as the western US gets tugged in different directions by tectonic plate movements.

That has created several small faults and cracks in the rock instead of one big one, like California's San Andreas Fault.

As stress builds up along these small faults, it gets released as earthquakes, often in clusters (swarms) that typically stay under 5.0 in magnitude.

However, this region of Nevada also has a long history of being used for testing America's weapons of mass destruction, a process that can also cause the same types of seismic tremors being experienced over the last week.

Area 52 is a highly classified US military installation operated by the Department of Energy and the Department of War.

It has primarily been used for nuclear weapons stockpile maintenance, testing delivery systems, fusing and firing research and related classified activities.

The experiments at the base have sparked controversy in recent years as former military personnel have claimed that their work exposed them to toxic radioactive material, which led to cancer and other illnesses. 

There is extensive evidence that underground nuclear tests generate seismic waves that seismic instruments record as earthquake-like events.

These signals are initially cataloged and studied similarly to natural earthquakes by the USGS National Earthquake Information Center (NEIC), but can later be distinguished from natural quakes based on certain characteristics that reveal them to be explosions.

Key differences include nuclear explosions releasing energy near the surface, with real earthquakes typically involving deeper fault slippage and producing more shear waves.

However, the seismic signals from a nuclear test still look very similar to natural quakes and can even trigger small aftershocks or fault movements in some cases.

The US government recently provided a tour of a secret nuclear lab at an undisclosed location in Nevada, which from the outside looked like a bunch of harmless factory buildings and an old mining shaft.

Last year, officials with the US National Nuclear Security Administration (NNSA) warned America may soon have no choice but to restart its weapons testing programs amid reports that both Russia and China were expanding their programs.

During the tour, officials revealed that new, top-secret devices were being installed at the underground lab in late 2025 to contain microscopic explosions - simulating the blast of an atom bomb. 

Live nuclear testing moved underground in the 1960s, but all of these experiments ended in 1992 when the US implemented a unilateral moratorium on nuclear explosive testing.

The Trump Administration allowed those restrictions to lapse during the president's first year since returning to office, officially ending the New START treaty on February 5, 2026.

Trump's October 2025 directive to resume nuclear testing 'on an equal basis' with Russia and China sparked preparations and rhetoric about potentially ending the long-standing voluntary moratorium on explosive tests. As of early March 2026, however, no full-scale nuclear explosive detonations have occurred.

Prior to the strikes in Iran, President Trump called that nation's alleged work towards creating nuclear weapons 'a red line' that could not be crossed.