NASA: Meteor explosion over the US had the power of 300 tons of TNT

NASA has confirmed that the loud boom that startled residents of the northeastern US states on Saturday afternoon was caused by the destruction of a large meteor high in the atmosphere. Experts estimated the explosion's energy to be "equivalent to about 300 tons of TNT," the American space agency reported.

The fireball flew over the northeastern part of Massachusetts and southeastern New Hampshire shortly after 2:00 p.m. local time on May 30, before breaking apart at an altitude of about 40 miles – approximately 64 kilometers above the Earth's surface.

What happened over Massachusetts

According to NASA, the meteor entered the Earth's atmosphere at a speed of over 120,000 kilometers per hour, turning into a bright "fireball" in the sky. Due to immense friction and pressure, the celestial body could not hold together and broke into fragments, releasing concentrated energy at that moment.

It was this energy – estimated at about 300 tons of TNT – that caused a shockwave and a boom that residents of the region perceived as a loud explosion or even a slight earthquake. NASA emphasizes that this was a natural celestial body, not debris from a satellite or another type of artificial object.

How strong is an explosion equal to 300 tons of TNT

Energy of 300 tons of TNT is many times weaker than that of a nuclear weapon, but it is comparable to a large conventional explosion and is quite sufficient to produce a loud sound effect and a noticeable shockwave over a significant area. In the current incident, there are no reports of material damage or injuries – the effect was limited to a light phenomenon and a boom.

How NASA arrived at the energy estimate

The estimate of the explosion's strength is based on a combination of data – atmospheric sensors, infrasound detectors, radar observations, and eyewitness accounts. Infrasound waves, which travel over long distances, allow for the calculation of the released energy, while data on the meteor's altitude and speed are determined thanks to optical and radar surveillance systems.

Specialists point out that the object was not associated with an active meteor shower, meaning it was a single natural fragment – likely from an asteroid crossing Earth's orbit.

How often do such events occur

According to NASA data, fireballs with energy from tens to hundreds of tons of TNT enter the atmosphere several times a year, but most occur over oceans or sparsely populated areas and go virtually unnoticed. Modern monitoring systems record tens of thousands of smaller meteors annually that burn up completely high in the atmosphere.

The case over Massachusetts attracted attention precisely because it occurred over a densely populated area during the daytime and was accompanied by a clearly audible boom. The American Meteor Society reported dozens of reports from eyewitnesses who saw a bright flash and heard the subsequent explosive sound.

Is there a danger to people and infrastructure

Experts are unanimous that in this specific case, there was no real danger to the population. The altitude of the destruction – over 60 kilometers – means that most of the fragments burned up completely before reaching the lower layers of the atmosphere.

Nevertheless, such events remind us of Earth's vulnerability to larger celestial bodies. NASA and other space agencies maintain programs to monitor "potentially hazardous asteroids" that have orbits crossing Earth's. Currently, tens of thousands of objects of this type have been cataloged, and no direct collision with Earth is expected for any of them in the coming decades.

Why it is not "space debris"

In its statements, NASA explicitly emphasizes that the object was a "natural celestial body," not a fragment of an artificial satellite or other equipment. The reasons for this conclusion are several – the speed was significantly higher than that of typical orbital debris, and the trajectory and nature of the glow correspond to a stony meteoroid.

Furthermore, space debris is usually well-cataloged, whereas in this case, no match with known objects was found. This provides additional grounds to assume that it was a natural phenomenon.

The cosmic protection of the planet – between statistics and psychology

Although, in absolute terms, 300 tons of TNT is a small amount of energy compared to the largest known cosmic explosions, the psychological effect on people in the affected area is significant – a loud, inexplicable boom from the sky inevitably raises associations with disasters or military actions.

This is precisely why quick and clear explanations from NASA and local authorities are key: when people know it is a meteor and that such events are rare and almost always happen high in the atmosphere, fear gives way to curiosity. In the long run, incidents like this also serve as a reminder of why planetary defense and asteroid monitoring programs should not be underestimated.