The 1857 Fort Tejon earthquake occurred at about 8:20 a.m. on January 9 in central and Southern California
Owens Valley Earthquake
1872 Lone Pine earthquake. The 1872 Lone Pine Earthquake struck on March 26 at 02:30 local time with an estimated moment magnitude of 7.4 to 7.9 and a maximum Mercalli Intensity of X (Extreme). Its epicenter was near Lone Pine, California, in Owens Valley.
Imperial Valley Earthquake
The 1892 laguna Salada earthquake occurred at 23:20 Pacific Standard Time on February 23 . It had an estimated moment magnitude of 7.1–7.2 and a maximum perceived intensity of VIII (Severe).
San Francisco Earthquake
The 1906 San Francisco earthquake struck the coast of Northern California at 5:12 a.m. on Wednesday, April 18 with an estimated moment magnitude of 7.9 and a maximum Mercalli intensity of XI.
Kern County Earthquake
The 1952 Kern County earthquake occurred on July 21 in the southern San Joaquin Valley and measured 7.3 on the moment magnitude scale. The main shock occurred at 4:52 am Pacific Daylight Time, killed 12 people and injured hundreds, and caused an estimated $60 million in property damage.
The 1980 Eureka earthquake occurred on November 8 at 02:27:34 local time along the northern coastal area of California in the United States. With a moment magnitude of 7.3 and a maximum Mercalli intensity of VII (Very strong), this strike-slip earthquake was the largest to occur in California in 28 years.
Alpine Meadows Avalanche
On March 31, 1982, at 15:45 a large soft-slab natural avalanche released at Alpine Meadows Ski Area.
The 1992 Landers earthquake occurred on June 28 with an epicenter near the town of Landers, California. The shock had a moment magnitude of 7.3 and a maximum Mercalli intensity of IX
The 1994 Northridge earthquake was a magnitude of 6.7, blind thrust earthquake that occurred on January 17, 1994 at 4:30:55 a.m. PST in the San Fernando Valley region of the County of Los Angeles.
Mammoth Mountain Avalanche
Avalanche closes Mammoth Mountain, popular California ski destination, after eight partially buried. Christal Hayes, USA TODAY Published 5:29 p.m. ET March 3, 2018 | Updated 12:05 a.m. ET March 4, 2018.