Donald Vincent Helmberger ( (1938-January-{{{day}}}) (2020-February-{{{day}}})January 1938 – February 2020) was an American seismologist; described in his Seismological Research Letters obituary as "one of the most impactful seismologists to have lived".
[2] A memorial issue in Earthquake Science[a] was published in his honor February 2022.
[3] He served as head of the Caltech Seismological Laboratory from 1998 to 2003,[4][5] and was the Smits Family Professor of Geophysics, Emeritus upon his death.
[9][10] After earning his Ph.D. in 1967, he worked as a research associate for Massachusetts Institute of Technology, and then as a faculty member at Princeton University.
[13] Following his death, Mike Gurnis said that Helmberger had "discovered more about the deep interior of the Earth in the last half of the 20th century than any other researcher in the world.