From John Schilling, 38 North: “On January 19, South Korea’s Yonhap news agency reported that North Korea had placed two missiles on mobile launchers in preparation for possible testing in the early days of the Trump administration. Details are still scarce, and it should be noted that North Korea has in the past prepared missiles for launch without conducting any test. As we recently noted, missile “tests” are often political demonstrations, and often what is being demonstrated includes an element of restraint. And, of course, if launch preparations indicate technical problems likely to lead to failure, the nature of the demonstration will likely be changed to accommodate the technical reality. Still, it is possible that North Korea could conduct a missile test in the next few days.”
Possible North Korean ICBM Test Launch Site
From Joseph S. Bermudez Jr,. 38 North: "One of the possible locations for an ICBM test is the Kalma Ballistic Missile Test Site located on the shores of the East Sea adjacent to the Kalma International Airport. Opened around May-June 2016, the test site consists of a single 24-meter-by-17-meter concrete-paved launch position surrounded by a sand berm, grading for a second firing position and graded access roads. It is supported by several components of the Kalma International Airport including a pull-through hangar for pre-launch preparations, two observation and support buildings and a paved parking lot. It is probable that the airport’s radars are used to support ballistic missile tests by both tracking missile flights and ensuring that the East Sea airspace is clear of traffic.