Earthquakes by city United States 100 km

Seismic city profile

Earthquake in Union City today

Union City, United States: 266 earthquakes of magnitude 4.0+ detected within 100 km.

Population

74,494

Residents in the indexed city record.

Earthquakes

266

Earthquakes at M4.0+ nearby.

Max magnitude

7.9

Strongest recorded event in the current radius.

Timezone

America/Los_Angeles

Coordinates 37.596, -122.019

Nearby activity pulse

Last 30 days

Last 12 months

Last nearby event: 2026-04-02 08:41 UTC

Strongest nearby event

M 7.9

San Francisco, United States

1906-04-18 13:12 UTC

Updated today

Earthquake in Union City today

No earthquake of magnitude M4.0+ has been detected today within 100 km of Union City.

1 M4.0+ event(s) have been observed in the last 30 days around Union City.

The strongest earthquake recorded near Union City reached magnitude 7.9 on 1906-04-18 13:12 UTC, near San Francisco.

Status today

No earthquake detected today

Strongest today

Was there an earthquake in Union City today?

No earthquake of magnitude M4.0+ has been detected today within 100 km of Union City.

When was the last earthquake near Union City?

The last nearby earthquake was recorded on 2026-04-02 08:41 UTC.

What is the strongest earthquake recorded near Union City?

The strongest earthquake recorded near Union City reached magnitude 7.9 on 1906-04-18 13:12 UTC, near San Francisco.

Map

Earthquakes within 100 km of Union City

The map centers on Union City and highlights the most recent earthquakes detected within 100 km.

Average magnitude

4.5

Average depth

7.2 km

Timeline

Recent seismic activity

Latest 4 events shown

UTC	Magnitude	Region	Depth
2026-04-02 08:41	M 4.6	Santa Cruz United States	10.4 km
2026-02-02 15:01	M 4.2	Fremont United States	9.6 km
2025-11-27 20:57	M 4.0	Salinas United States	8.2 km
2025-09-22 09:56	M 4.3	San Francisco United States	7.6 km

Monthly profile

Recent monthly trend

2025-09 1 events

2025-11 1 events

2026-02 1 events

2026-04 1 events

Historic snapshot

Earthquakes history

Strongest years

1906 M 7.9 max · 1 earthquakes 1989 M 6.9 max · 50 earthquakes 1911 M 6.5 max · 1 earthquakes 1926 M 6.4 max · 3 earthquakes 1984 M 6.2 max · 6 earthquakes

Year	Max magnitude	Earthquakes
2026	M 4.6	2
2025	M 4.3	2
2024	M 4.2	1
2023	M 4.5	2
2022	M 5.1	2
2021	M 4.2	1
2019	M 4.5	2
2018	M 4.4	1
2017	M 4.1	2
2015	M 4.1	2
2014	M 6.0	2
2011	M 4.1	1
2010	M 4.1	1
2009	M 4.3	1
2008	M 4.1	1
2007	M 5.5	4
2006	M 4.5	2
2005	M 4.2	2
2004	M 4.3	1
2003	M 4.0	3
2002	M 4.9	1
2001	M 4.4	3
2000	M 4.9	1
1999	M 4.6	1
1998	M 4.3	2
1996	M 4.9	2
1995	M 4.2	2
1994	M 4.1	2
1993	M 4.9	2
1992	M 4.0	1
1991	M 4.6	5
1990	M 5.4	15
1989	M 6.9	50
1988	M 5.3	5
1987	M 4.4	3
1986	M 5.7	6
1984	M 6.2	6
1982	M 4.5	2
1981	M 4.8	6
1980	M 5.8	10
1979	M 5.8	6
1978	M 4.2	3
1977	M 4.4	3
1976	M 4.0	1
1975	M 4.4	5
1974	M 5.2	18
1973	M 4.6	2
1972	M 4.9	1
1971	M 4.8	2
1970	M 4.6	3
1969	M 4.3	1
1967	M 5.3	3
1965	M 4.9	1
1964	M 5.2	1
1963	M 5.4	3
1959	M 5.3	2
1958	M 4.7	2
1957	M 5.3	3
1955	M 5.8	1
1954	M 5.3	3
1951	M 4.8	1
1949	M 4.5	1
1948	M 4.6	2
1947	M 4.4	1
1941	M 4.5	1
1939	M 4.5	1
1938	M 4.5	2
1937	M 4.5	1
1933	M 5.0	2
1932	M 4.9	3
1930	M 4.5	2
1928	M 4.8	2
1927	M 5.0	2
1926	M 6.4	3
1924	M 4.5	1
1919	M 4.6	2
1917	M 4.8	1
1916	M 5.0	1
1915	M 4.5	1
1914	M 5.5	2
1912	M 4.5	1
1911	M 6.5	1
1910	M 5.8	2
1909	M 4.5	1
1906	M 7.9	1
1903	M 6.2	2
1902	M 5.4	1
1900	M 4.5	1