On Saturday, Oct. 14th The FAA Warned Pilots there would be a no-fly zone in parts of Montana. Well, the rocket launched and it not only caused one earthquake but, two small earthquakes. One on each side, exactly in the same distance away from where the rocket was launched.

See this corresponding video.
In 2015 the Pentagon released FOIA documents with plans to replace the Minuteman III ICBM with a new rocket, one that would launch from the same silos in Montana and South Dakota where missiles sit as of this report in 2015. However, America's only land-based ICBM is the Minuteman III ICBM. These were supposed to be replaced in 2020, but in 2007 Congress and the Obama administration decided to keep the weapons on alert until 2030.
Each missile can carry up to three nuclear warheads, which have a yield in the range of 300 to 500 kilotons. Peaking at 1,000 missiles in the 1970s, the current U.S. force consists of 450 Minuteman-III missiles in missile silos around Malmstrom AFB, Montana; Minot AFB, North Dakota; and F.E. Warren AFB, Wyoming.

As of 2016, the LGM-30G Minuteman III version is the only land-based ICBM in service in the United States.
Malmstrom AFB is one of three US Air Force Bases that maintains and operates the Minuteman III intercontinental ballistic missile. The 341st Missile Wing reports directly to Twentieth Air Force at F.E. Warren Air Force Base, Wyoming. It is part of Global Strike Command headquartered at Barksdale Air Force Base, Louisiana.
Built 1941
In use 1941 to present.

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