Historic Earthquakes
Klamath Falls, Oregon
1993 September 21 03:28:55 UTC Magnitude 6.0
1993 September 21 05:45:33 UTC Magnitude 6.0
September 21 03:28:55
The Klamath Falls earthquakes caused two deaths and
approximately 7.5 million U.S. dollars in damage. One person
was killed when the car he was driving was crushed by a boulder
in an earthquake-induced rockfall and another person died of a
heart attack. More than 1,000 homes and commercial buildings
were damaged. Maximum intensity VII in downtown Klamath Falls
and at the Oregon Institute of Technology about three
kilometers north of downtown. Three highways leading to Klamath
Falls were temporarily closed because of rockfalls or concern
about possible damage to bridges. Rockfalls and rockslides
occurred in roadcuts and on steep slopes throughout the
epicentral region. Ground cracks in fill material were observed
at several locations in the area. Felt in southern Oregon as
far north as Eugene and in northern California as far south as
Redding.
September 21 05:45:33
Additional damage in the
Klamath Falls area. At some locations northwest of Klamath
Falls this earthquake produced higher intensities than the
event which occurred at 03:28.
An aftershock of M5.4 occurred on December 04, 1993, at 22:15:19 UTC, which caused additional damage (VII) at Klamath Falls. It also caused slight damage (VI) at Tulelake, California.