EveryQuake

Earthquakes in Ontario

1,554 earthquakes catalogued in and around Ontario between 1903 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
1.6
Latest earthquake · depth 6.7 km
26.07.2026 04:39 UTC · from centre 888 km
1,554
recorded earthquakes
M6.2
largest
1903–2026
record span
2.44
mean magnitude
1,435
epicentre inside the border

By year

Stacked by magnitude; one column per year.

0561131903: 1 (M3–4)19031905: 1 (M3–4)1905: 1 (M4–5)1906: 1 (M3–4)1906: 1 (M4–5)1908: 1 (M3–4)1909: 1 (M3–4)1909: 1 (M5+)1912: 1 (M4–5)1913: 1 (M4–5)19131914: 1 (M5+)1916: 1 (M4–5)1917: 2 (M4–5)19231928: 1 (M4–5)1929: 1 (M4–5)1931: 1 (M5+)19331934: 1 (M4–5)1935: 1 (M5+)1943: 1 (M4–5)19431944: 1 (M4–5)1944: 1 (M5+)1947: 1 (M3–4)19531958: 1 (M5+)19631964: 1 (M4–5)1966: 2 (M4–5)1967: 1 (M4–5)1969: 1 (M3–4)1972: 1 (M4–5)1973: 1 (M3–4)19731975: 2 (M3–4)1975: 2 (M4–5)1976: 1 (M3–4)1977: 2 (M3–4)1978: 2 (M<3)1978: 2 (M3–4)1978: 1 (M4–5)1979: 1 (M3–4)1980: 2 (M3–4)1980: 1 (M4–5)1981: 2 (M<3)1981: 5 (M3–4)1982: 1 (M<3)1982: 3 (M3–4)1983: 3 (M<3)1983: 4 (M3–4)1983: 2 (M4–5)19831984: 1 (M<3)1984: 7 (M3–4)1984: 1 (M4–5)1985: 1 (M<3)1985: 2 (M3–4)1986: 4 (M<3)1986: 4 (M3–4)1986: 1 (M4–5)1987: 4 (M<3)1987: 5 (M3–4)1988: 4 (M3–4)1989: 1 (M3–4)1989: 1 (M4–5)1990: 1 (M<3)1990: 1 (M3–4)1990: 2 (M4–5)1991: 2 (M3–4)1991: 3 (M4–5)1992: 4 (M3–4)1992: 1 (M4–5)1993: 5 (M3–4)1993: 1 (M4–5)19931994: 3 (M3–4)1995: 1 (M<3)1995: 8 (M3–4)1996: 1 (M3–4)1996: 1 (M4–5)1997: 2 (M<3)1997: 3 (M3–4)1997: 1 (M4–5)1998: 1 (M<3)1998: 6 (M3–4)1998: 2 (M4–5)1999: 2 (M<3)1999: 4 (M3–4)1999: 1 (M4–5)2000: 1 (M<3)2000: 2 (M3–4)2000: 2 (M4–5)2001: 1 (M<3)2001: 5 (M3–4)2002: 1 (M<3)2002: 4 (M3–4)2002: 1 (M4–5)2002: 1 (M5+)2003: 2 (M<3)2003: 3 (M3–4)2003: 2 (M4–5)20032004: 5 (M<3)2004: 2 (M3–4)2004: 2 (M4–5)2005: 18 (M<3)2005: 7 (M3–4)2005: 1 (M4–5)2006: 48 (M<3)2006: 7 (M3–4)2006: 3 (M4–5)2007: 87 (M<3)2007: 10 (M3–4)2007: 1 (M4–5)2008: 47 (M<3)2008: 6 (M3–4)2009: 34 (M<3)2009: 4 (M3–4)2010: 62 (M<3)2010: 9 (M3–4)2010: 1 (M5+)2011: 38 (M<3)2011: 7 (M3–4)2012: 30 (M<3)2012: 4 (M3–4)2012: 1 (M4–5)2013: 56 (M<3)2013: 10 (M3–4)2013: 2 (M4–5)20132014: 44 (M<3)2014: 4 (M3–4)2015: 52 (M<3)2015: 9 (M3–4)2015: 1 (M4–5)2016: 37 (M<3)2016: 2 (M3–4)2017: 61 (M<3)2017: 9 (M3–4)2018: 54 (M<3)2018: 11 (M3–4)2019: 48 (M<3)2019: 13 (M3–4)2020: 57 (M<3)2020: 55 (M3–4)2020: 1 (M4–5)2021: 47 (M<3)2021: 42 (M3–4)2021: 2 (M4–5)2022: 59 (M<3)2022: 11 (M3–4)2023: 81 (M<3)2023: 9 (M3–4)2023: 3 (M4–5)20232024: 51 (M<3)2024: 12 (M3–4)2025: 42 (M<3)2025: 3 (M3–4)2026: 43 (M<3)2026: 4 (M3–4)2026: 1 (M4–5)
M<3M3–4M4–5M5+

Read this chart carefully. Rising columns do not mean earthquakes are becoming more frequent. The monitoring network improved over time: the smallest detectable earthquake in Türkiye was about M5.0 in 1966 and is M1.5 today. Earlier years look quiet because small events were not heard, not because they did not happen.

Largest earthquakes

Inclusion rule: the radius widens with magnitude (15 km up to M4, 150 km at M7 and above). This is not a measure of felt shaking or intensity.

MagnitudeDateDepthDistance
6.201.11.1935 06:0360 km494 km
6.117.05.1958 15:38460 km
5.605.09.1944 04:3835 km884 km
5.608.01.1931 00:1335 km785 km
5.223.06.2010 17:4115.3 km762 km
5.120.04.2002 10:508.7 km962 km
5.110.02.1914 18:31853 km
5.026.05.1909 14:42880 km
5.031.01.1986 16:4610 km889 km
4.907.10.1983 10:189.2 km952 km
4.717.05.2013 13:4310.8 km726 km
4.712.08.1929 11:249 km845 km
4.619.10.1990 07:0117 km737 km
4.516.06.1991 16:4618 km637 km
4.527.07.1966 08:290 km363 km

Latest earthquakes

MagnitudeDateDepthDistance
1.626.07.2026 04:396.7 km888 km
1.325.07.2026 01:325 km838 km
2.023.07.2026 05:129.5 km880 km
2.908.07.2026 19:385 km813 km
1.206.07.2026 06:003.2 km841 km
2.601.07.2026 04:4112.9 km479 km
0.728.06.2026 07:009.7 km869 km
1.418.06.2026 03:545 km667 km
1.608.06.2026 02:5510 km728 km
2.223.05.2026 06:4310.4 km890 km
2.314.05.2026 00:276 km888 km
2.704.05.2026 21:327.9 km805 km
1.503.05.2026 08:512.8 km665 km
1.303.05.2026 08:505 km666 km
1.202.05.2026 23:078.9 km854 km
2.030.04.2026 15:5313.9 km723 km
3.330.04.2026 15:410 km553 km
1.829.04.2026 04:2221.7 km800 km
3.026.04.2026 14:325 km814 km
2.526.04.2026 01:592.2 km914 km
2.521.04.2026 02:4811.2 km813 km
4.214.04.2026 16:3613.2 km725 km
2.108.04.2026 23:178 km879 km
1.608.04.2026 17:414 km891 km
1.805.04.2026 22:216.9 km861 km
1.703.04.2026 07:5710 km808 km
2.721.03.2026 13:088.9 km862 km
1.421.03.2026 07:195 km877 km
2.213.03.2026 11:245 km882 km
2.306.03.2026 00:337.6 km880 km
2.905.03.2026 23:554.9 km879 km
1.501.03.2026 16:4521.2 km828 km
1.427.02.2026 03:255 km870 km
2.221.02.2026 16:166.9 km880 km
1.721.02.2026 01:3514.4 km788 km
1.931.01.2026 06:096.9 km669 km
1.531.01.2026 04:559.7 km664 km
1.529.01.2026 05:307 km927 km
3.728.01.2026 03:595 km667 km
1.828.01.2026 02:065 km927 km
2.127.01.2026 09:393.2 km927 km
1.827.01.2026 07:525 km928 km
1.720.01.2026 18:2928.4 km815 km
1.620.01.2026 10:1220.7 km818 km
2.720.01.2026 09:5518.5 km820 km
2.320.01.2026 09:4815.6 km817 km
2.706.01.2026 04:505 km874 km
3.005.01.2026 06:3915.9 km659 km
2.027.12.2025 15:528.3 km999 km
1.423.12.2025 08:245 km877 km
1.510.12.2025 08:506.3 km757 km
1.602.12.2025 00:165 km865 km
1.822.11.2025 06:579.3 km986 km
3.915.11.2025 09:580 km411 km
2.310.11.2025 08:128.3 km871 km
1.802.11.2025 01:065 km1041 km
2.222.10.2025 23:197.8 km856 km
3.020.10.2025 00:469.8 km407 km
1.715.10.2025 00:5910 km816 km
1.614.10.2025 04:533.2 km912 km

Method and sources

What this page counts
An earthquake appears here when its epicentre is within a magnitude-dependent distance of this place's border: 15 km up to M4, 30 km to M5, 60 km to M6, 100 km to M7, and 150 km at M7 and above. The rule exists because a large earthquake concerns neighbouring provinces too — the 17 August 1999 epicentre was in the Gulf of İzmit, on no province's land at all.
Location precision
Epicentre uncertainty is typically 1–10 km, and larger for older records. That is why this site breaks data down to districts but not to neighbourhoods or villages — the data does not support that distinction.
Magnitude scales
The catalogues use more than twelve magnitude scales (Mw, ML, mb, Md…) and they are not equivalent. Values are shown on the scale the source reported; they are not converted.
Deduplication
The same earthquake is published by several catalogues. Records within 20 seconds and 100 km whose magnitudes differ by no more than 1.2 are treated as one event; the primary record is chosen by catalogue priority.
Updates
Recent earthquakes are fetched from four sources every five minutes. The historical archive is rebuilt infrequently.
Sources
USGS ComCat · ISC Bulletin · AFAD · Kandilli / KOERI · EMSC/CSEM
Reporting an error
If you spot a wrong record, write to us; we verify against the source and correct it.