@misc{indiciae9c5704245d2c,
  title = {Swarms of repeating long-period earthquakes at Shishaldin Volcano, Alaska, 2001-2004},
  author = {Tanja Petersen},
  year = {2007},
  doi = {10.1016/j.jvolgeores.2007.07.014},
  url = {https://pubs.usgs.gov/publication/70171027},
  note = {Source identifier: 70171027}
}