Supposed SN 1006 was only 4 lightyears away what would the blasts impact be like on earth?
Last week, a paper was posted on arxiv (https://arxiv.org/abs/1707.04253v1) which studies the "The Resilience of Life to Astrophysical Events", in particular it deals with the temperature change of oceans (as boiling oceans would evaporate the water of a planet which seems to be bad for biological life forms...). For a assumed SN explosion of Proxima Centauri the temperature change of Earth oceans would only be 0.1 degree Celsius - not enough to extinct life by boiling the oceans.


  


(extract from Sloan, Batista and Loeb, 2017)