 Earthquakes can be detected more accurately with seismometers located in rocky mountainous regions away from valleys and other sources of noise. In order to further reduce noise, some seismologists have begun placing seismometers underground. However, this can be difficult due to limited availability of suitable locations. A solution proposed by the Korean Meteorological Administration involves installing borehole seismometers which can convert motion within the borehole to surface seismic waves. This allows engineers to estimate ground surface motion from borehole record data, making it possible to detect earthquakes even if they occurred deep below the surface. This article was authored by Doyeon Lim and Jay Kwongon.