power lines. This type of pulse can be caused by a nuclear detonation, a lightning strike, or even a geomagnetic storm. While an EMP can be incredibly destructive, it doesn’t last forever. But knowing how long you need to shelter your equipment before it is safe to remove it is an essential part of being prepared for such an event. So, exactly how long will an EMP last? And EMP can last from seconds to days. The duration of an EMP can depend on a number of factors, such as the source itself, the intensity of pulse and the distance from the source. In general, a nuclear or non-nuclear EMP will last for a few seconds.
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