This volcano is fairly large but very flat. It is 300 km long by 200 km wide, but it is only about 400 m high. Note how the leftmost flow out of Idem-Kuva curves around its base. This suggests that Nissaba formed before the flow. It may even have formed before Idem-Kuva.
Many coronas lie in groups or chains.
Here, we see one such grouping of 4 or 5 coronas about 200 to 250 km across. It is part of a much longer chain over 4000 km long. The coronas overlap in places, but they are also linked by a number of bright faultlines. These faults are part of a major rift zone, Parga Chasma, that seems to have helped the coronas form. Indeed, the Parga rift has the highest density of coronas to be found on Venus.