Generically speaking, anything that occurs above Earth's surface is referred to as an airburst. Be that one inch above or 1,000 miles above.
There are three types of nuclear blasts: the afore mentioned air burst, surface burst (that detonates upon impact, and the subsurface burst that detonates by timer or at depth.
It occurs to me that your question may be worded confusingly, and you could mean the intent of detonating a nuclear device, specifically a thermonuclear device at high altitude. If this is the case, the result is an EMP (electron magnetic pulse), intended to knock out a power grid and solid state components.
High-Altitude Blast
High-altitude burst
high-altitude burst
trinity was the code of the detonation of the nuclear deviceit was the first nuclear bomb in the world
a place that generates nuclear energy
high-altitude burst
High-Altitude Blast
High-altitude burst
high-altitude burst
High-altitude burst
high altitude burst
high-altitude burst
High-altitude burst
high altitude burst
A star is any hydrostatically stable plasma that generates heat and electromagnetic radiation by nuclear fusion.
One meaning is the abbreviation for Electromagnetic Pulse. This is an intense magnetic field created by the detonation of a nuclear weapon. The EMP is capable of burning out electrical devices.
surface