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.

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