TY - RPRT TI - Spatial seismicity rates and maximum magnitudes for background earthquakes AU - Mark D. Petersen AU - Charles S. Mueller AU - Arthur D. Frankel AU - Yuehua Zeng PY - 2008 DO - 10.3133/ofr20071437j UR - https://pubs.usgs.gov/publication/ofr20071437J ID - ofr20071437J ER -