The Pacific and North American tectonic plates grind past each other at a rate of about 39mm a year. They experienced a massive earthquake in 1906 and another in 1989 but another Big One is inevitable; it is just a question of when. No one knows. Scientists are studying the fault line and this article here shows their latest attempts but will this investigation trigger “the big one”? Read also this article.
There is also a recording here to show the effect of the 1906 earthquake. Click here to see an explanation about how earthquakes happen. Good animation here!
Click here for a panoramic view of the city. Can you find the Golden Gate Bridge?
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