Themis Regio, a hotspot rise on Venus, has multiple coronae and volcanoes with high emissivity signatures in VIRTIS data.

Flows with high emissivity anomalies can be interpreted as relatively recent volcanic activity, indicating that coronae and volcanoes have been active simultaneously in the Themis region.

These volcanic features also have negative Bouguer gravity anomalies indicating low density at depth, consistent with hot mantle upwellings leading to pressure release melting.

Geologic mapping data, gravity and emissivity data provide support that Themis is an active hotspot swell, with associated long-lived volcanoes and coronae that are likely associated with small-scale upwellings.