Earth tide lunar and the solar tidal maxima and minima (bulges and depressions) add together for the greatest tidal range at particular latitudes. At first- and third-quarter phases of the moon, lunar and solar tides are perpendicular, and the tidal range is at a minimum. The semi-diurnal tides go through one full cycle (a high and low tide) about once every 12 hours and one full cycle of maximum height (a spring and neap tide) about once every 14 days. The development of a systematic theory of Earth tides was started by George H. Darwin in 1879, and was then furthered by
Full Moon (Sunmi EP) includes her debut single "24 Hours". "Full Moon" featuring Lena Park was released on February 17, along with the album and music video. The song reached number 2 on the weekly Gaon Digital Charts and number 3 on Billboard's Korea K-pop Hot 100. Full Moon (Sunmi EP) Full Moon is the debut extended play by South Korean singer Sunmi. It was released by JYP Entertainment on February 17, 2014. In August 2013, it was announced that Sunmi would return to her musical career as a solo artist under JYP Entertainment and Park Jin-young himself would take over her complete production,