Vol. 37 No. 2 (2020)

Cover image:
View of the Popocatépetl volcano from the northwest. To the right of the crater you can see the Ventorrillo hill and the head of the Nexpayantla ravine. The front of the photo shows the Tlamacas dome, on which the station of the same name is located. See related article by Zaragoza et al. in this number; photo courtesy of the authors.