In order to discover anything about the interior of the earth, we must design and implement experiments. For seismologists, this means installing, servicing, fixing, and moving seismometers and data aquisition equipment all over the globe. I have had the fortune to work on two temporary seismic experiments during my PhD career.:
FLED: This 28-station broadband seismic array spanned a line from FlorIDa to Edmonton, Alberta. This orientation aligns the array with two-thirds of the worlds deepest earthquakes that occur around the northern and western edges of the Pacific. The array was perfectly designed to examine a 2-D slice through the Earth.
TAMSEIS: This 43-station broadband seismic array consists of three sub-arrays that have provIDed the first high resolution image of the Antarctic crust and upper mantle. I was able to assist with the a one year trial run with 8 stations, and subsequent two year deployment of the entire array.