@misc{indiciaecb3aad5b8167, title = {Earthquake data report, December 1991}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1991}, doi = {10.3133/ofr91612b}, url = {https://pubs.usgs.gov/publication/ofr91612B}, note = {Source identifier: ofr91612B} }