Stream channels that cross the fault line are often "beheaded" or sharply offset, providing a physical timeline of past movements.
While Hollywood films often depict the San Andreas opening into a giant chasm, the reality is different but equally serious. Seismologists warn that a large-scale rupture in the Southern segment could cause widespread damage to the Los Angeles basin.
Runs from Hollister through the Santa Cruz Mountains and San Francisco, eventually heading out to sea at Point Arena. It was responsible for the devastating 1906 San Francisco earthquake . subtitle San Andreas
This movement isn't smooth; the plates are "locked" together by friction. Pressure builds up over decades until the rocks break, releasing energy as an earthquake.
Geologists estimate that the plates move at an average rate of about —roughly the same speed your fingernails grow. 2. Three Distinct Segments Stream channels that cross the fault line are
The San Andreas is a , meaning two tectonic plates are sliding past each other horizontally.
Programs like ShakeAlert now provide precious seconds of warning to residents before the strongest shaking arrives. Runs from Hollister through the Santa Cruz Mountains
Major infrastructure, including the California Aqueduct and several interstate highways, crosses the fault. Engineers must use specialized "slip joints" and flexible materials to ensure these lifelines don't snap during a rupture. 4. Preparing for the "Big One"