CORE CONCEPTS Correction for “Core Concept: What are the chances of a hazardous solar superflare?,” by Stephen Battersby, which was first published November 19, 2019; 10.1073/pnas.1917356116 (Proc. Natl. Acad. Sci. U.S.A. 116, 23368–23370).
The editors note that reference 1 appeared incorrectly. The publication year should appear as 2019 instead of 2018. The complete corrected reference appears below. The article has been corrected online.
1. Y. Notsu et al., Do Kepler superflare stars really include slowly rotating sun-like stars?—Results using APO 3.5 m telescope spectroscopic observations and Gaia-DR2 data. Astrophys. J. 876, 58 (2019).