Tawhaki Vallis (Io)
Māori lightning god.
Tawhaki Vallis is a shallow valley on Jupiter's moon Io. It is located on Io's leading hemisphere in the equatorial plains of western Media Regio in the equatorial plains of western Media Regio. The valley is 190 kilometers long, 0.5 to 6 km wide, and 40 to 65 meters deep. Due to the shallow depth and lack of brightness or color variations associated with it, Tawhaki Vallis was seen in only a single, high spatial resolution observation taken by Galileo during an Io encounter on November 26, 1999. (wikipedia entry)
A vallis is a valley. On Io they are named after named derived from nearby named feature.
Image Source. Marker locations are approximate and may not always appear to align with image on map.
Tawhaki Vallis
0.31° N 287.24° E