A medal awarded annually by the American Geophysical Union "to be awarded annually for significant contributions by outstanding young scientists." It is named after James B. Macelwane, a Jesuit priest and one of the pioneers of seismology. The medal is regarded as the highest honor for young scientists in the field of Geological and Planetary Sciences.
| Year | Recipient | Photo |
|---|---|---|
| 2010 | David B. Lobell | |
| 2010 | Rosalind E. Rickaby | |
| 2010 | Jasper A. Vrugt | |
| 2009 | Peter J. Huybers | |
| 2009 | Miaki Ishii | |
| 2009 | Benjamin P. Weiss | |
| 2008 | James Badro | |
| 2008 | Emily E. Brodsky | |
| 2008 | Diane E. Pataki | |
| 2007 | Amy C. Clement | |
| 2007 | Jeanne Hardebeck | |
| 2007 | Francis Nimmo | |
| 2006 | Daniel J. Frost | |
| 2006 | Jerry Goldstein | |
| 2006 | Jun Korenaga | |
| 2005 | Paul Asimow | |
| 2005 | A. Hope Jahren | |
| 2005 | James T. Randerson | |
| 2004 | Robin M. Canup | |
| 2004 | Daniel Sigman | |
| 2004 | David W. J. Thompson | |
| 2003 | Kurt M. Cuffey | |
| 2003 | Guido Salvucci | |
| 2003 | Lianxing Wen | |
| 2002 | George Katul | |
| 2002 | John M. Eiler | |
| 2002 | Michael Manga | |
| 2001 | Vassilis Angelopoulos | |
| 2001 | Daniel P. Schrag | |
| 2001 | Azadeh Tabazadeh | |
| 2000 | Scott Doney | |
| 2000 | Erik Hauri | |
| 2000 | Quentin Williams | |
| 1999 | Jeroen Tromp | |
| 1999 | Rainer Hollerbach | |
| 1999 | Kenneth A. Farley | |
| 1998 | Tuija I. Pulkkinen | |
| 1998 | Lars P. Stixrude | |
| 1997 | Edouard Bard | |
| 1997 | Marc Parlange | |
| 1997 | Robert van der Hilst | |
| 1996 | David Bercovici | |
| 1996 | Dara Entekhabi | |
| 1996 | David Roy Hanson | |
| 1995 | Stephen Fuselier | |
| 1995 | Jonathan I. Lunine | |
| 1995 | Jason Phipps Morgan | |
| 1994 | Jeremy Bloxham | |
| 1994 | Daniel J. Jacob | |
| 1994 | John E. Vidale | |
| 1993 | Michael Gurnis | |
| 1993 | David J. McComas | |
| 1993 | Margaret A. Tolbert | |
| 1992 | Eric Kunze | |
| 1992 | David G. Sibeck | |
| 1992 | Terry C. Wallace | |
| 1991 | Thomas A. Herring | |
| 1991 | Roderic L. Jones | |
| 1991 | Thorne Lay | |
| 1990 | Steven M. Gorelick | |
| 1990 | Paul Segall | |
| 1990 | Ellen M. Druffel | |
| 1989 | Richard G. Gordon | |
| 1989 | Seth A. Stein | |
| 1989 | William R. Young | |
| 1988 | Douglas R. MacAyeal | |
| 1988 | Marcia McNutt | |
| 1988 | Kevin B. Quest | |
| 1987 | J. Leslie Smith | |
| 1987 | Toshio Terasawa | |
| 1987 | Mary Lou Zoback | |
| 1986 | Bradford H. Hager | |
| 1986 | Edward M. Stolper | |
| 1986 | Robert A. Weller | |
| 1985 | William H. Matthaeus | |
| 1985 | Susan Solomon | |
| 1985 | John M. Wahr | |
| 1984 | Mary K. Hudson | |
| 1984 | Raymond Jeanloz | |
| 1984 | John H. Woodhouse | |
| 1983 | William L. Chameides | |
| 1983 | Donald J. DePaolo | |
| 1983 | Thomas H. Jordan | |
| 1982 | Rafael L. Bras | |
| 1982 | Donald W. Forsyth | |
| 1982 | Steven C. Wofsy | |
| 1981 | Ronald G. Prinn | |
| 1981 | David J. Southwood | |
| 1981 | Donald J. Weidner | |
| 1980 | Lawrence Grossman | |
| 1980 | Thomas Westfall Hill | |
| 1980 | Norman H. Sleep | |
| 1979 | Ralph J. Cicerone | |
| 1979 | Michael C. Kelley | |
| 1979 | R. Keith O'Nions | |
| 1978 | John M. Edmond | |
| 1978 | Thomas E. Holzer | |
| 1977 | Paul G. Richards | |
| 1977 | Ignacio Rodriguez-Iturbe | |
| 1977 | Christopher T. Russell | |
| 1976 | John S. Lewis | |
| 1976 | Kurt Lambeck | |
| 1976 | Robert L. Parker | |
| 1975 | Dan McKenzie | |
| 1975 | Vytenis M. Vasyliunas | |
| 1975 | Gerald Schubert | |
| 1974 | Amos M. Nur | |
| 1973 | R. Allan Freeze | |
| 1972 | John Michael Wallace | |
| 1971 | Carl I. Wunsch | |
| 1970 | Lynn R. Sykes | |
| 1969 | Richard S. Lindzen | |
| 1968 | Michael B. McElroy | |
| 1967 | Manik Talwani | |
| 1966 | Don L. Anderson | |
| 1965 | Gordon J. F. MacDonald | |
| 1964 | Klaus F. Hasselmann | |
| 1963 | Alexander J. Dessler | |
| 1962 | James N. Brune |