Total length1.2 million m
10.5 millionPopsicle lengths
127 trillionthsLight-years
15.8 millionHockey puck diameters
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The 1,200 km crack running through California/Geology & Minerals
The San Andreas Fault is a transform plate boundary stretching about 1,200 km through California, marking where the Pacific and North American tectonic plates grind past each other. The fault zone can be up to 1.6 km wide in places. The plates move at an average rate of about 46 mm per year. Major earthquakes along the fault include the devastating 1906 San Francisco earthquake (magnitude 7.9) and the 1857 Fort Tejon earthquake (magnitude 7.9).
At widest points
About 46 mm per year
About 28 million years