Voice of Korea
On occasion, Voice of Korea has missed its regular service. The interruptions have not been explained by Voice of Korea, but they are thought to be due to engineering works at the transmitter sites, faulty equipment or because of power outages. In 2012 they occurred when the country was facing one of its worst electricity shortages in years. The off-air periods also affect North Korea's own jamming signals designed to prevent reception of South Korean stations such as Echo of Hope, Voice of the People, and KBS Hanminjok Radio.