Two moderate earthquakes occurred approximately 30 km northwest (122.1°W and 42.3°N) of Klamath Falls, Oregon on the evening of September 20th. These two were measured at M 5.9 and M 6.0 by the University of Washington and occurred at an approximate depth of 20 km. The USGS National Earthquake Information Center in Golden, Colorado reported the preliminary magnitude at 5.4 and 5.2 at depths of 10 km. Numerous after-shocks measuring between M 2.8 and M 4.3, occurring in the same general vicinity, were felt in the area through September 24th. The earthquakes were felt in Salem (300 km north) and in Redding, California (150 km south). One person was killed by falling rocks on highway US 97, approximately 25 km north of town, and one person died of a heart attack, probably induced by the events. Unfortunately, there were no seismographs located in southern Oregon during the earthquakes; thus, the records from more distant seismographs are not as precise as is liked. Since the earthquake, USGS has established eight seismographs in the area to record aftershocks. They have recorded over 100 events since installation