The Inge Lehmann Medal is given out by the American Geophysical Union to recognize "outstanding contributions to the understanding of the structure, composition, and dynamics of the Earth's mantle and core". The award was created in 1997 and named after seismologist Inge Lehmann who discovered Earth's inner core.
Past recipients
Source: American Geophysical Union
References
Inge Lehmann Medal Wikipedia(Text) CC BY-SA