July 4, 1861 Earthquake: Contra Costa,alameda Counties, California, United States
An earthquake struck Contra Costa,alameda Counties, California, United States on July 4, 1861 at 00:11:00 UTC.
Map
Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.
The earthquake
- Date
- July 4, 1861
- Time
- 00:11:00 UTC
- Place
- Contra Costa,alameda Counties, California, United States
- Intensity
- 11 on the Modified Mercalli scale
- Tsunami
- None recorded
- Epicenter
- 37.500° N, 122.000° W
- Country
- United States
The toll
- Damage
- Severe (about $5 to $25 million)
Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- April 18, 1906, San Francisco, California, United States
- October 18, 1989, Loma Prieta, California, United States
- October 21, 1868, Hayward,san Francisco, California, United States
- August 24, 2014, Napa, Vallejo, California, United States
- October 2, 1969, Santa Rosa, California, United States
- November 26, 1858, San Jose,san Francisco, California, United States
- October 31, 2007, San Jose, California, United States
- February 15, 1856, Northern, California, United States
- September 24, 1859, Half Moon Bay, California, United States
- April 24, 1984, Morgan Hill, Central, California, United States
- October 8, 1865, Santa Cruz, California, United States
- June 1838, San Francisco,san Jose,santa Clara, California, United States
- July 20, 2007, Montclair, California, United States
- January 24, 1980, Livermore, California, United States
- February 10, 1869, San Francisco, California, United States
More
Significant earthquakes of 1861The 1800sRecent earthquakes near hereThis day in weather history
Sources
Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI earthquake 2051.