To cite package ‘IRISSeismic’ in publications use:

  Callahan J, Casey R, Sharer G, Templeton M (2022). _IRISSeismic:
  Classes and Methods for Seismic Data Analysis_. R package version
  1.6.6, <https://github.com/cranhaven/cranhaven.r-universe.dev>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {IRISSeismic: Classes and Methods for Seismic Data Analysis},
    author = {Jonathan Callahan and Rob Casey and Gillian Sharer and Mary Templeton},
    year = {2022},
    note = {R package version 1.6.6},
    url = {https://github.com/cranhaven/cranhaven.r-universe.dev},
  }