  We suggest to use the Hubble Space Telescople (HST) follow-up observations of
the TESS targets for detecting possible plasma tori along the orbits of
exoplanets orbiting M dwarfs. The source of the torus could be planetary
volcanic activity due to tidal or electromagnetic induction heating. Fast
losses to space for planets orbiting these active stars can lead to the lost
material forming a torus along the planetary orbit, similar to the Io plasma
torus. We show that such torus would be potentially detectable by the HST in
the UV.
