Hannes Alfvén of the University of California, San Diego, and Stephan Mueller of theEidgenïssische Technische Hochschule (ETH), Zürich, have been awarded honorary membership in the European Geophysical Society (EGS). In the award citation, EGS called Alfvén “the father of the modern discipline ... known as hydromagnetism, or magnetohydrodynamics,” and praised his reexamination of theories of the origin of the solar system and his theories of cosmic rays and cosmic magnetic fields. Mueller was commended for his dedication to the EGS, which he has served as a council member, as president, and as the first editor in chief of Annales Geophysicae.