Electromagnetic pulses

An EMP attack. The idea is that a foreign enemy detonates a nuclear bomb at high altitude to generate a strong electromagnetic pulse (EMP) across a nation. This pulse would have no effect on humans, but could strongly affect both the power grid and individual electronic devices. These videos help to understand electromagnetic pulses:

High-altitude Electromagnetic Pulse (HEMP): Potential Impacts, and EPRI Research Approach
From the video’s description: “High-altitude electromagnetic pulse (HEMP) refers to the electromagnetic pulse that is created by the high-altitude detonation of a nuclear weapon. Numerous stakeholders assert that a HEMP attack is probable, and its impact would be catastrophic to the power system infrastructure. However, a science-based approach is needed to assess the true impact of this threat. To address this gap, EPRI has developed a comprehensive research plan that will be carried out over a three-year period. This video provides an overview of science of high-altitude electromagnetic pulses and EPRI’s three-year research plan.”
Nuclear Explosion in the Sky
5 things you need to know about EMP’s
Engineer Tim Carty explains how an EMP — an electromagnetic pulse — works
This video describes the worst case scenario as portrayed in many science fiction books and movies.

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