A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... to -38° in January, while at Rykovsk in the interior the minimum is -49° Fahr. The rainfall averages 22 1/2 in. Thick clouds for the most part shut out the sun; while the ...