Sagarmatha Zone
Sagarmāthā () was one of the fourteen zones of Nepal until the restructuring of zones into provinces. "Sagarmāthā" is a Nepali word derived from सगर् (sagar) meaning "sky" and माथा (māthā) meaning "head".
Samatha
In Burma, "samatha" comprises all concentration practices, aimed at calming the mind. In the last decade samatha in the Burmese tradition has been popularized in the west by Pa Auk Sayadaw. This tradition upholds the emphasis on samatha explicit in the commentarial tradition of the Visuddhimagga. Pa Auk Sayadaw presented this tradition through extensive retreats around the world until his retirement in 2012. 
The Thai Forest tradition deriving from Ajahn Mun and popularized by Ajahn Chah stresses the inseparability of "samatha" and "vipassana", and the essential necessity of both practices.