Sean-Thomas Morrissey, an innovative and dedicated instrumentalist, died on March 6th at the age of 59. He was a remarkable individual who worked tirelessly, despite recurring health problems, to find new ways to improve the quality of both seismological and geodetic data. Sean brought a dedication, a perseverance, and a commitment to seismology, to long-term data acquisition, and to instrumentation that helped our science evolve from its beginnings with analog on-site photo recordings to modern digital data acquisition and transmission.

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Sean was educated in the Jesuit tradition, graduating from St. Mark's Academy in Denver and attending Saint Louis University (SLU),...

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