The January 25, 1957 earthquake

M5.0near Conway, Washington

A magnitude 5.0 earthquake, 3.5 miles off Skagit County. The 25th strongest in Washington’s record since 1900, and the strongest within 50 miles since a magnitude 5.0 on May 15, 1954.

The earthquake

Magnitude
5.0
local magnitude (ml)
Depth
—
Not recorded
Local time
Friday, January 25, 1957
17:16 PST; 01:16 UTC on Jan 26, 1957
Epicentre
48.33°N, 122.43°W
3.5 mi from Skagit County
In Washington’s record
25th
strongest of 5,002 since 1900
Within 50 miles
9
counties; more on this date

USGS ANSS Comprehensive Earthquake Catalog, event ushis2130 (“6 km W of Conway, Washington”). 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

200 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: 3 1974: 6 1975: 3 1976: 4 1977: 7 1978: 2 1979: 3 1980: 6 1981: 5 1982: 3 1983: 2 1984: 5 1985: 8 1986: 7 1987: 0 1988: 4 1989: 4 1990: 18 18 1991: 1 1992: 2 1993: 1 1994: 1 1995: 0 1996: 13 1997: 5 1998: 2 1999: 2 2000: 6 2001: 3 2002: 4 2003: 0 2004: 2 2005: 3 2006: 2 2007: 5 2008: 2 2009: 3 2010: 3 2011: 6 2012: 3 2013: 4 2014: 2 2015: 3 2016: 4 2017: 6 2018: 3 2019: 2 2020: 3 2021: 1 2022: 3 2023: 4 2024: 3 2025: 3 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.