Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, Sue Hirschfeld. |
One of the most dramatic examples of tectonic creep is found in a residential area north of downtown Hayward at the corner of Rose and Prospect Streets. Photographs taken over twenty two years show the offset of the curb by creep. The top photo was taken in 1974. Note the same location in a photo taken in 1993 (bottom photo). Image Credit: Sue Hirschfeld. Seismic creep is the constant or periodic movement on a fault as contrasted with the sudden rupture associated with an earthquake. It is a usually slow deformation of rock resulting from constant stress being applied over a period of time. Sometimes aseismic slip is observed at the ground surface along a ruptured fault that has produced a substantial earthquake. Examples are from the Hollister and Hayward, California, region. Several of the slides are split images of a location, comparing fault movement over the years. |
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