EveryQuake
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Earthquakes in Okayama Prefecture

191 earthquakes catalogued in and around Okayama Prefecture between 1905 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
3.4
Latest earthquake · depth 10 km
10.07.2026 06:16 UTC · from centre 68 km
191
recorded earthquakes
M7.8
largest
1905–2026
record span
4.36
mean magnitude
50
epicentre inside the border

By year

Stacked by magnitude; one column per year.

022441905: 1 (M5+)19051906: 1 (M5+)1909: 1 (M5+)19151925: 2 (M5+)19251927: 1 (M5+)1930: 2 (M5+)1934: 1 (M5+)19351940: 1 (M5+)1943: 4 (M5+)19451949: 1 (M5+)1955: 1 (M5+)19551961: 1 (M5+)1964: 1 (M5+)1965: 1 (M4–5)19651966: 2 (M4–5)1967: 1 (M4–5)1967: 1 (M5+)1968: 1 (M4–5)1969: 1 (M4–5)1970: 1 (M4–5)1972: 2 (M4–5)1973: 3 (M4–5)1973: 1 (M5+)1974: 4 (M4–5)19751977: 1 (M4–5)1978: 1 (M4–5)1978: 2 (M5+)1979: 1 (M4–5)1981: 1 (M4–5)1983: 3 (M4–5)1983: 1 (M5+)1984: 9 (M4–5)1984: 1 (M5+)1985: 2 (M4–5)19851986: 2 (M4–5)1987: 1 (M4–5)1989: 2 (M4–5)1989: 1 (M5+)1990: 4 (M4–5)1990: 1 (M5+)1991: 1 (M5+)1994: 1 (M4–5)1995: 2 (M4–5)1995: 1 (M5+)19951996: 1 (M3–4)1997: 2 (M4–5)1997: 1 (M5+)1999: 1 (M4–5)2000: 2 (M3–4)2000: 15 (M4–5)2000: 3 (M5+)2001: 2 (M3–4)2001: 9 (M4–5)2001: 2 (M5+)2002: 1 (M3–4)2002: 2 (M4–5)2002: 1 (M5+)2003: 1 (M4–5)2004: 1 (M4–5)20052007: 1 (M3–4)2011: 1 (M5+)2013: 1 (M5+)2015: 3 (M4–5)20152016: 5 (M4–5)2016: 1 (M5+)2018: 1 (M5+)2020: 2 (M4–5)2021: 1 (M3–4)2021: 5 (M4–5)2022: 1 (M3–4)2022: 1 (M4–5)2023: 1 (M3–4)2024: 1 (M3–4)2025: 3 (M3–4)2025: 1 (M4–5)20252026: 38 (M3–4)2026: 4 (M4–5)2026: 2 (M5+)
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
7.802.06.1905 05:39100 km194 km
7.107.03.1927 09:2710 km137 km
7.014.08.1909 06:3135 km210 km
7.010.09.1943 08:3715 km65 km
6.916.01.1995 20:4618.4 km117 km
6.824.03.2001 06:2747.7 km139 km
6.706.10.2000 04:309.8 km67 km
6.623.05.1925 02:0915 km123 km
6.313.08.1967 20:06365 km157 km
6.221.10.2016 05:0710.7 km57 km
6.227.07.1955 01:2015 km131 km
6.225.05.1925 16:2215 km126 km
6.111.07.1949 16:1044.8 km170 km
6.004.05.1906 23:0935 km130 km
5.911.09.1943 01:1615 km57 km

Latest earthquakes

MagnitudeDateDepthDistance
3.410.07.2026 06:1610 km68 km
3.026.06.2026 22:0010 km53 km
3.315.06.2026 22:2210 km50 km
3.321.04.2026 14:5920 km74 km
3.816.04.2026 17:4020 km74 km
3.510.04.2026 09:4610 km74 km
3.124.02.2026 01:0810 km68 km
3.020.02.2026 13:0710 km74 km
3.420.01.2026 03:2510 km74 km
3.015.01.2026 01:2010 km74 km
3.212.01.2026 14:0810 km74 km
3.409.01.2026 14:0120 km74 km
3.209.01.2026 03:020 km74 km
3.408.01.2026 16:3610 km68 km
4.007.01.2026 09:3910 km74 km
3.306.01.2026 22:2810 km74 km
3.206.01.2026 19:5410 km74 km
3.506.01.2026 16:1510 km74 km
3.906.01.2026 15:2010 km74 km
3.006.01.2026 14:0910 km74 km
3.506.01.2026 13:5210 km74 km
3.006.01.2026 13:4510 km74 km
4.006.01.2026 13:2310 km74 km
3.906.01.2026 10:5320 km74 km
3.006.01.2026 10:2810 km74 km
3.606.01.2026 10:2110 km74 km
3.206.01.2026 07:2610 km74 km
3.206.01.2026 07:2010 km74 km
3.706.01.2026 06:3810 km74 km
3.706.01.2026 04:4120 km74 km
3.306.01.2026 04:0510 km74 km
3.606.01.2026 03:4310 km68 km
3.206.01.2026 02:2910 km74 km
3.306.01.2026 02:1310 km74 km
3.406.01.2026 02:1010 km74 km
4.106.01.2026 02:0010 km74 km
3.606.01.2026 01:5010 km74 km
3.406.01.2026 01:4120 km74 km
5.006.01.2026 01:3710 km84 km
3.806.01.2026 01:3420 km74 km
4.806.01.2026 01:280 km75 km
5.806.01.2026 01:188.9 km81 km
3.305.01.2026 09:4210 km74 km
3.205.01.2026 07:4310 km74 km
3.225.12.2025 10:2210 km52 km
3.008.10.2025 06:2910 km28 km
3.325.07.2025 21:4320 km34 km
4.429.06.2025 00:5910 km73 km
3.929.07.2024 14:1220 km80 km
3.610.02.2023 02:0110 km68 km
3.815.08.2022 10:5610 km59 km
4.303.05.2022 06:5010 km60 km
4.114.11.2021 14:2310 km95 km
4.012.11.2021 23:4910 km95 km
3.519.08.2021 20:0020 km64 km
4.217.08.2021 16:3110 km80 km
4.017.08.2021 16:316.4 km72 km
4.002.08.2021 00:3710.8 km76 km
4.027.08.2020 15:1910 km59 km
4.103.04.2020 05:3020 km57 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.