The November 18, 1927 earthquake

M5.0near Nipomo, California

A magnitude 5.0 earthquake, centred in San Luis Obispo County. The 451st strongest in California’s record since 1900, and the strongest within 50 miles since a magnitude 6.9 on November 4, 1927.

The earthquake

Magnitude
5.0
as reported (uk)
Depth
—
Not recorded
Local time
Friday, November 18, 1927
19:32 PST; 03:32 UTC on Nov 19, 1927
Epicentre
35.00°N, 120.50°W
In San Luis Obispo County
In California’s record
451st
strongest of 97,065 since 1900
Within 50 miles
3
counties; more on this date

USGS ANSS Comprehensive Earthquake Catalog, event ushis776 (“5 km SSW of Nipomo, California”). The USGS event page carries the ShakeMap, felt reports and the official summary.

Counties and cities within 50 miles

Distance from the epicentre to each county boundary (zero when inside) and to each city centre.

Counties

Cities, largest first

Earthquakes around the epicentre

283 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.

Earthquakes of magnitude 3 or more within 50 miles of the epicentre, by year 1973: 0 1974: 3 1975: 2 1976: 4 1977: 4 1978: 0 1979: 3 1980: 4 1981: 5 1982: 16 1983: 8 1984: 8 1985: 5 1986: 4 1987: 3 1988: 4 1989: 9 1990: 9 1991: 2 1992: 1 1993: 1 1994: 5 1995: 3 1996: 2 1997: 6 1998: 2 1999: 2 2000: 4 2001: 0 2002: 0 2003: 68 68 2004: 34 2005: 9 2006: 3 2007: 4 2008: 5 2009: 4 2010: 2 2011: 1 2012: 1 2013: 1 2014: 0 2015: 2 2016: 8 2017: 7 2018: 4 2019: 1 2020: 2 2021: 0 2022: 0 2023: 2 2024: 2 2025: 4 19731978198319881993199820032008201320182023

Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first

USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.