The reason for it is that this long drawn festival that is celebrated for one full fortnight as an elaborate ritual is associated with the appearance of Bhairava (Shiva) as a jwala-linga or a linga of flame. It has been described as Bhairavotsava in Tantric texts as on this occasion Bhairava and Bhairavi, His Shakti or cosmic energy, are propitiated through Tantric worship. According to the legend associated with the origin of the worship, the linga appeared at pradoshakala or the dusk of early night as a blazing column of fire and dazzled Vatuka Bhairava and Rama (or Ramana) Bhairava, Mahadevi's mind-born sons, who approached it to discover its beginning or end but miserably failed. Exasperated and terrified they began to sing its praises and went to Mahadevi, who herself merged with the awe-inspiring jwala-linga. The Goddess blessed both Vatuka and Ramana that they would be worshipped by human beings and would receive their share of sacrificial offerings on that day and those who would worship them would have all their wishes fulfilled. As Vatuka Bhairava emerged from a pitcher full of water after Mahadevi cast a glance into it, fully armed with all his weapons (and so did Rama), he is represented by a pitcher full of water in which walnuts are kept for soaking and worshipped along with Shiva, Parvati, Kumara, Ganesha, their ganas or attendant deities, yoginis and kshetrapalas (guardians of the quarters) – all represented by clay images. The soaked walnuts are later distributed as naivedya. The ceremony is called 'vatuk barun' in Kashmiri, which means filling the pitcher of water representing the Vatuka Bhairava with walnuts and worshipping it. Central India has a large number of Shaiva followers. The Mahakaleshwar Temple, Ujjain is one of the most venerated shrines consecrated to Shiva, where a large congregation of devotees gathers to offer prayers on the day of Maha Shivaratri. Tilwara Ghat in the city of Jabalpur and the Math Temple in the village of Jeonara, Seoni are two other places where the festival is celebrated with much religious fervour. In Punjab, Shobha Yatras would be organised by various Hindu organisations in different cities.