@misc{indiciae87edec217245, title = {Source mechanisms of persistent shallow earthquakes during eruptive and non-eruptive periods between 1981 and 2011 at Mount St. Helens, Washington}, author = {Heather L. Lehto and Diana C. Roman and Seth C. Moran}, year = {2013}, doi = {10.1016/j.jvolgeores.2013.02.005}, url = {https://pubs.usgs.gov/publication/70044660}, note = {Source identifier: 70044660} }