@article{Hayakawa2020a,
	journal = {The\ Astrophysical\ Journal\ Letters},
	year = 2020,
	title = {{The Extreme Space Weather Event in 1903 October/November:
	          An Outburst from the Quiet Sun}},
	author = {Hisashi Hayakawa and Paulo Ribeiro and Jos\'e M. Vaquero  
	          and Mar\'ia Cruz Gallego and Delores J. Knipp and Florian Mekhaldi 
	          and Ankush Bhaskar and Denny M. Oliveira and Yuta Notsu 
	          and V\'ictor M. S. Carrasco and Ana Caccavari and Bhaskara Veenadhari 
	          and Shyamoli Mukherjee and Yusuke Ebihara},
	doi = {10.3847/2041-8213/ab6a18},
  volume = 897,
  number = 1,
  pages = {L10}
}