Ontario, United States: 480 earthquakes of magnitude 4.0+ detected within 100 km.
Map
The map centers on Ontario and highlights the most recent earthquakes detected within 100 km.
Timeline
| UTC | Magnitude | Region | Depth |
|---|---|---|---|
| 2025-07-31 16:32 | M 4.4 |
Riverside
United States
|
5.3 km |
Monthly profile
Historic snapshot
Strongest years
| Year | Max magnitude | Earthquakes |
|---|---|---|
| 2025 | M 4.4 | 1 |
| 2024 | M 4.4 | 5 |
| 2023 | M 4.2 | 1 |
| 2021 | M 4.3 | 2 |
| 2020 | M 4.5 | 2 |
| 2018 | M 4.5 | 2 |
| 2016 | M 4.4 | 1 |
| 2015 | M 4.4 | 2 |
| 2014 | M 5.1 | 6 |
| 2013 | M 4.1 | 1 |
| 2012 | M 4.5 | 3 |
| 2011 | M 4.2 | 2 |
| 2010 | M 4.4 | 4 |
| 2009 | M 4.7 | 3 |
| 2008 | M 5.4 | 3 |
| 2007 | M 4.7 | 4 |
| 2005 | M 4.9 | 5 |
| 2004 | M 4.2 | 1 |
| 2003 | M 5.0 | 8 |
| 2002 | M 4.8 | 2 |
| 2001 | M 4.7 | 5 |
| 2000 | M 4.4 | 2 |
| 1999 | M 5.6 | 3 |
| 1998 | M 4.8 | 7 |
| 1997 | M 5.1 | 5 |
| 1996 | M 4.1 | 1 |
| 1995 | M 4.2 | 1 |
| 1994 | M 6.7 | 49 |
| 1993 | M 4.1 | 1 |
| 1992 | M 6.3 | 50 |
| 1991 | M 5.8 | 4 |
| 1990 | M 5.5 | 5 |
| 1989 | M 5.0 | 8 |
| 1988 | M 5.0 | 6 |
| 1987 | M 5.9 | 8 |
| 1986 | M 6.0 | 9 |
| 1985 | M 4.6 | 1 |
| 1984 | M 4.2 | 1 |
| 1983 | M 4.0 | 1 |
| 1982 | M 4.4 | 2 |
| 1979 | M 5.2 | 6 |
| 1978 | M 4.3 | 2 |
| 1977 | M 4.4 | 2 |
| 1976 | M 4.5 | 3 |
| 1974 | M 4.4 | 1 |
| 1973 | M 4.5 | 1 |
| 1972 | M 4.0 | 1 |
| 1971 | M 6.6 | 50 |
| 1970 | M 5.2 | 3 |
| 1969 | M 4.4 | 3 |
| 1968 | M 4.1 | 1 |
| 1967 | M 4.1 | 1 |
| 1965 | M 5.0 | 4 |
| 1963 | M 5.3 | 2 |
| 1962 | M 5.0 | 5 |
| 1961 | M 4.6 | 6 |
| 1960 | M 4.1 | 1 |
| 1956 | M 4.7 | 5 |
| 1955 | M 4.1 | 1 |
| 1954 | M 4.1 | 2 |
| 1952 | M 4.8 | 2 |
| 1951 | M 4.1 | 1 |
| 1950 | M 4.8 | 3 |
| 1948 | M 4.6 | 1 |
| 1946 | M 4.9 | 1 |
| 1945 | M 4.3 | 2 |
| 1944 | M 5.2 | 8 |
| 1943 | M 5.3 | 5 |
| 1942 | M 4.6 | 3 |
| 1941 | M 5.1 | 3 |
| 1940 | M 4.7 | 4 |
| 1939 | M 4.5 | 2 |
| 1938 | M 5.2 | 3 |
| 1937 | M 4.4 | 2 |
| 1936 | M 4.7 | 1 |
| 1935 | M 4.9 | 9 |
| 1934 | M 4.5 | 4 |
| 1933 | M 6.4 | 80 |
| 1932 | M 4.3 | 2 |
| 1930 | M 5.3 | 3 |
| 1929 | M 4.7 | 1 |
| 1927 | M 5.3 | 1 |
| 1925 | M 4.5 | 1 |
| 1923 | M 6.2 | 1 |
| 1920 | M 4.9 | 1 |
| 1918 | M 6.7 | 2 |
| 1916 | M 4.5 | 1 |
| 1911 | M 4.5 | 1 |
| 1910 | M 6.0 | 3 |
| 1907 | M 5.3 | 1 |
| 1902 | M 4.5 | 1 |