| Description | Black and white group photograph of the Seismological Laboratory, California Institute of Technology [Caltech], Pasadena, California, USA, [Mar/Apr-Jun 1969]. L-R: Max Wyss, Charlie Sammis, Horst Stoekel, Ed Gafney, Walt Arabaz, Tom Ahrens, Hans Jarosch, Dan McKenzie, Charles Richter, Pete Lagus, Don Anderson, Tom Hanks, Tom Jordan, Hartmut Spetzler, Clarence Allan. |
| Administrative History | Between March/Apr-June 1969, McKenzie was employed as a three month annual Visiting Associate at the California Institute of Technology (Caltech), Pasadena, California, USA. |