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 Productions and last issue was released in winter 1996. In the late 1990s Full Moon Productions put out the "A Tribute to Hell – Satanic Rites" compilation CD. This double included tracks by Mayhem, Acheron, Thy Infernal, Tartaros, Centurian, Swordmaster, Outbreak, Naglfar, Thy Primordial, Sacramentum and others, some of which were exclusive contributions to the CD. The cover was done by Joe Petagno, who is known for the Motörhead artwork. Full Moon Productions relocated to South Denver (Parker), Colorado in May 2006. Full Moon Productions officially ceased label and distribution operations in 2012; however, its last official release, the debut release