South Korea's science ministry said Tuesday it has signed an agreement with the military to make joint efforts against a possible electromagnetic pulse attack from North Korea.

The National Radio Research Agency inked the memorandum of understanding with the Army Engineer School, according to the Ministry of Science, ICT and Future Planning.

It calls for the two sides to share EMP test equipment, develop preventive technologies together and exchange relevant specialists.

An EMP occurs when a nuclear device is detonated at a high altitude, potentially damaging the power grid and making most electronic devices useless.

Concern of a North Korean EMP attack has grown recently in the wake of its fourth nuclear test, which it claimed was hydrogen-based, in January. (Yonhap)