100+ ‘Mysterious Earthquakes’ Detected Near US Nuclear Testing Site

A swarm of more than 120 earthquakes rattled a remote stretch of central Nevada this week near a cluster of sensitive U.S. military and nuclear-related facilities.

At least 127 tremors have been recorded since Saturday in the highly restricted region surrounding the Tonopah Test Range, sometimes referred to as “Area 52.” The most recent quake was detected on Wednesday.

The earthquakes ranged in magnitude from 3.3 down to roughly 1.4 and struck near the desert installation outside the small town of Tonopah.

The range is not primarily used for nuclear detonations, but it has long been connected to America’s nuclear weapons programs.

Officials have used the facility to test how nuclear weapons would be delivered, including experiments where aircraft drop non-nuclear versions of bombs to study their performance. The range has also hosted missile and aircraft testing, and during the Cold War, it was used in experiments where mock nuclear bombs were dropped to simulate real weapons deployments.

The recent earthquake swarm occurred outside the nearby Nevada National Security Site, which remains active in the nation’s nuclear weapons program.

Scientists say the flurry of quakes is most likely tied to the region’s natural geology.

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Central Nevada lies within the Basin and Range Province, a vast region of the western United States where the Earth’s crust is slowly pulling apart.

As the land stretches, stress builds along hundreds of underground faults that periodically slip, triggering earthquakes. The process frequently produces swarms, clusters of dozens or even hundreds of small tremors occurring in the same place over a short period.

Nevada ranks among the most seismically active states in the country, and such swarms are common across the Basin and Range region.

Even though the latest tremors struck near multiple military installations, experts say the activity is most likely the result of natural tectonic movement rather than human activity.

Still, the region has a long history tied to America’s nuclear weapons program, where testing has previously produced similar seismic signatures.

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The Tonopah Test Range is a classified U.S. military installation primarily operated by the Department of Energy and the U.S. Air Force.

The site has primarily been used for nuclear weapons stockpile maintenance, testing delivery systems, fusing and firing research and other classified work.

Nearby, the Nevada National Security Site — formerly known as the Nevada Test Site — served as the primary location for U.S. nuclear weapons testing during the Cold War.

Between 1951 and 1992, more than 900 nuclear tests were conducted there, many of the later ones carried out as underground detonations.

Although full nuclear explosions have not taken place there for decades, the site remains active. It now hosts subcritical nuclear experiments and other research designed to ensure the safety and reliability of the nation’s nuclear arsenal.

The earthquake swarm began Saturday, the same day the United States and Israel launched strikes on Iran.

The tremors also come weeks after the last remaining nuclear weapons treaty between the United States and Russia expired in February.

In late October 2025, President Donald Trump ordered the U.S. military to resume nuclear weapons testing, arguing the move was necessary to keep pace with alleged testing by Russia and China.

However, the U.S. government has made no announcement that full-scale nuclear explosive testing has restarted.

For now, scientists say the quake cluster likely reflects a stretch of routine geological activity in one of the country’s most earthquake-prone regions.

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