San Andreas Fault at Frazier Park

"In the beginning of 1857, we had a more serious earthquake than any in recent years. At half-past eight o'clock on the morning of January 9th, a tremor shook the earth from North to South; the first shocks being light, the quake grew in power until houses were deserted, men, women and children sought refuge in the streets, and horses and cattle broke loose in wild alarm. For perhaps two, or two and a half minutes, the temblor continued and much damage was done. Los Angeles felt the disturbance far less than many other places, although five to six shocks were noted and twenty times during the week people were frightened from their homes; at Temple's rancho and at Fort Tejon, great rents were opened in the earth and then closed again, piling up a heap or dune of finely-powdered stone and dirt. Large trees were uprooted and hurled down the hillsides; and tumbling after them went the cattle. Many officers, including Colonel B. L. Beall—well known in Los Angeles social circles—barely escaped from the barracks with their lives; and until the cracked adobes could be repaired, officers and soldiers lived in tents."