One is called Ngu Facula, located within an unnamed crater in northern Matisse.

[3] The other is called Ahas Facula, located in an unnamed crater northeast of Matisse.

[4] Both of these faculae have irregular, rimless pits near their centers, and the combination of the presence of irregular pits with the bright halos around them support interpretation of the faculae as a sites of explosive volcanism.

[5] Within Matisse is a dark spot of low reflectance material (LRM).

[6] The dark spot is located on the southwest rim of the unnamed crater containing Ngu Facula.