Here are the related Nature scientific articles:
“A large sunspot” - [Nature, January 22, 1938, p.156]
https://isidore.co/misc/Res%20pro%20Deo/Other%20Documents/January%2025,%201938%20The%20Fatima%20Storm/%22Aurora%20of%20January%2025-26%22%20-%20[Nature,%20January%2029,%201938,%20p.192].pdf
“Aurora of January 25-26” - [Nature, January 29, 1938, p.192]
https://isidore.co/misc/Res%20pro%20Deo/Other%20Documents/January%2025,%201938%20The%20Fatima%20Storm/%22A%20large%20sunspot%22%20-%20[Nature,%20January%2022,%201938,%20p.156].pdf
“The aurora of January 25-26” - [Nature, February 5, 1938, p.232-235]
https://isidore.co/misc/Res%20pro%20Deo/Other%20Documents/January%2025,%201938%20The%20Fatima%20Storm/%22The%20aurora%20of%20January%2025-26%22%20-%20[Nature,%20February%205,%201938,%20p.232-235].pdf
“Cosmic rays and the aurora of January 25-26” - [Nature, April 16, 1938, p.686-7]
https://isidore.co/misc/Res%20pro%20Deo/Other%20Documents/January%2025,%201938%20The%20Fatima%20Storm/%22Cosmic%20rays%20and%20the%20aurora%20of%20January%2025-26%22%20-%20[Nature,%20April%2016,%201938,%20p.686-7].pdf
Sorry... first two links are reversed.