The Chen Trigram is composed of One unbroken (Yang) line, followed, counting upwards, by Two broken (Yin) lines. Adding the lines together Three + Two + Two=Seven, we understand that this is a Yang Trigram. The Word Chen Means literally “The Awakening”. However, it is usually taken to Mean "Thunder".
Fu Hsi placed Chen in the NorthEast, next to Kun. Thus, it is the earliest stirrings of Spring. Wiccans have likened Chen to the Festival of Imbolc, on February First. This is an amazing correlation. In this sense, Chen is a seedling, bursting forth upwards though the soil.
Emperor Wu placed Chen in the East. In this context, it correlates to the Wood Element, the Blue Dragon, the Liver and Sight.
Kabbalists like to link Chen with Geburah and the Planet Mars.
In Appendix Five of the I Ching, allegedly written by Confucius, it is explained as follows:
Chen shows the First application of Chien to Kun, resulting in the begetting of the First Son. Chen suggests the idea of thunder; of the dragon; of the azure and the yellow; of development; of a great highway; of the eldest son; of decision and vehemence; of bright young bamboos; of sedges and rushes; among horses, of the good neigher; of one whose white hind-leg appears, of the prancer, and of one with a white star in his forehead. In agriculture, Chen is the idea of what returns to life from its disappearance, of what in the end becomes the strongest, and of what is the most luxuriant. Chen is the Trigram of the North-East. In it all things bring to a full end the issues of the previous year, and prepare the commencement of the next. Hence it is said, “God completes the Year in Chen.”
Noah’s oldest son was Jafet (more often transliterated as “Japheth), which Name Means “He who opens”. He and his wife are said to be the ancestors of Europeans.
The Greek Legends tell only a slightly different story than the Hebrew. In the Greek version of the Legend, Japetos was one of the Titans, and the God of Mortality. Deucalion, who survived the Flood with his Three children, was the grandson of Japetos, not his father. Similarities abound between the Two Flood Legends.