Megh is a Hindustani classical raga.
Writing about the musical theory of Indian classical music is fraught with complications. First of all, there have been no set, formal methods of written notation. Indian music is an oral tradition, and therefore writing is not an essential part of attaining talim (training).
Arohana
S m R m P n S'
Avarohana
S' n P m R m 'n R S
In this raga vadi is Sa and samavadi is Pa - Re is used a lot but always sliding down from M, n always slides from P
R - R - S - 'n - S - m - R - P - m - R - 'n - S
Related ragas: Ragas of Malhar family, namely Megh Malhar, Miyan ki Malhar, Gaud Malhar, Ramdasi Malhar, Dhuliya Malhar, etc. as well as Madhmad Sarang
Thaat: Kafi.
Late night.
Raga Megh is commonly associated with the monsoon season.
This is one of the very old ragas found in the Indian Classical Music system. This raga is one of Prime Raga in six ragas and 36 raginis.
The Raga Guide: A Survey of 74 Hindustani Ragas. Zenith Media, London: 1999.
Ramashreya Jha explains difference between Sarang and Megh http://www.parrikar.org/hindustani/sarang/