EveryQuake

Earthquakes in Chiba Prefecture

3,357 earthquakes catalogued in and around Chiba Prefecture between 1905 and 2026.

Last updated 13 October 2026 · merged from 5 catalogues
4.7
Latest earthquake · depth 55.8 km
11.10.2026 16:24 UTC · from centre 12 km
3,357
recorded earthquakes
M7.9
largest
1905–2026
record span
4.46
mean magnitude
1,714
epicentre inside the border

By year

Stacked by magnitude; one column per year.

01913821905: 1 (M5+)19051906: 2 (M5+)1909: 4 (M5+)1911: 1 (M5+)19151916: 2 (M5+)1918: 1 (M5+)1919: 1 (M5+)1921: 2 (M5+)1922: 2 (M5+)1923: 12 (M5+)1924: 7 (M5+)1925: 1 (M5+)19251926: 3 (M5+)1927: 3 (M5+)1928: 3 (M5+)1929: 4 (M5+)1930: 8 (M5+)1931: 8 (M5+)1932: 1 (M5+)1934: 3 (M5+)1935: 3 (M5+)19351936: 1 (M5+)1937: 5 (M5+)1938: 7 (M5+)1940: 4 (M5+)1941: 3 (M5+)1942: 1 (M5+)1943: 3 (M5+)1944: 2 (M5+)1945: 1 (M5+)19451946: 2 (M5+)1947: 1 (M5+)1948: 4 (M5+)1949: 2 (M5+)1950: 2 (M5+)1951: 2 (M5+)1952: 1 (M5+)1953: 5 (M5+)1954: 1 (M5+)1955: 3 (M5+)19551956: 3 (M5+)1957: 1 (M5+)1958: 3 (M4–5)1958: 2 (M5+)1959: 1 (M4–5)1959: 1 (M5+)1960: 1 (M4–5)1960: 3 (M5+)1961: 6 (M4–5)1961: 5 (M5+)1962: 5 (M4–5)1962: 2 (M5+)1963: 4 (M4–5)1963: 3 (M5+)1964: 1 (M3–4)1964: 15 (M4–5)1964: 10 (M5+)1965: 1 (M3–4)1965: 15 (M4–5)1965: 8 (M5+)19651966: 22 (M4–5)1966: 4 (M5+)1967: 23 (M4–5)1967: 5 (M5+)1968: 18 (M4–5)1968: 5 (M5+)1969: 1 (M3–4)1969: 17 (M4–5)1969: 2 (M5+)1970: 10 (M4–5)1970: 3 (M5+)1971: 14 (M4–5)1971: 7 (M5+)1972: 12 (M4–5)1972: 4 (M5+)1973: 6 (M3–4)1973: 32 (M4–5)1973: 8 (M5+)1974: 5 (M3–4)1974: 20 (M4–5)1974: 6 (M5+)1975: 4 (M3–4)1975: 20 (M4–5)1975: 7 (M5+)19751976: 3 (M3–4)1976: 11 (M4–5)1977: 23 (M4–5)1977: 8 (M5+)1978: 22 (M4–5)1978: 8 (M5+)1979: 3 (M3–4)1979: 14 (M4–5)1979: 4 (M5+)1980: 2 (M3–4)1980: 21 (M4–5)1980: 12 (M5+)1981: 3 (M3–4)1981: 20 (M4–5)1981: 6 (M5+)1982: 38 (M4–5)1982: 12 (M5+)1983: 2 (M3–4)1983: 36 (M4–5)1983: 10 (M5+)1984: 25 (M4–5)1984: 10 (M5+)1985: 1 (M3–4)1985: 32 (M4–5)1985: 9 (M5+)19851986: 18 (M4–5)1986: 9 (M5+)1987: 34 (M4–5)1987: 8 (M5+)1988: 1 (M3–4)1988: 27 (M4–5)1988: 6 (M5+)1989: 7 (M3–4)1989: 22 (M4–5)1989: 11 (M5+)1990: 26 (M4–5)1990: 13 (M5+)1991: 1 (M3–4)1991: 23 (M4–5)1991: 4 (M5+)1992: 5 (M3–4)1992: 33 (M4–5)1992: 5 (M5+)1993: 1 (M3–4)1993: 12 (M4–5)1993: 2 (M5+)1994: 1 (M3–4)1994: 23 (M4–5)1994: 7 (M5+)1995: 1 (M3–4)1995: 27 (M4–5)1995: 3 (M5+)19951996: 11 (M3–4)1996: 28 (M4–5)1996: 5 (M5+)1997: 6 (M3–4)1997: 22 (M4–5)1997: 7 (M5+)1998: 1 (M3–4)1998: 27 (M4–5)1998: 6 (M5+)1999: 2 (M3–4)1999: 18 (M4–5)1999: 4 (M5+)2000: 4 (M3–4)2000: 28 (M4–5)2000: 7 (M5+)2001: 6 (M3–4)2001: 26 (M4–5)2001: 3 (M5+)2002: 5 (M3–4)2002: 23 (M4–5)2002: 3 (M5+)2003: 9 (M<3)2003: 2 (M3–4)2003: 29 (M4–5)2003: 9 (M5+)2004: 12 (M<3)2004: 5 (M3–4)2004: 29 (M4–5)2004: 10 (M5+)2005: 5 (M<3)2005: 15 (M3–4)2005: 60 (M4–5)2005: 9 (M5+)20052006: 2 (M<3)2006: 19 (M3–4)2006: 44 (M4–5)2006: 4 (M5+)2007: 18 (M3–4)2007: 45 (M4–5)2007: 5 (M5+)2008: 2 (M<3)2008: 16 (M3–4)2008: 46 (M4–5)2008: 9 (M5+)2009: 6 (M3–4)2009: 26 (M4–5)2009: 4 (M5+)2010: 3 (M3–4)2010: 21 (M4–5)2010: 2 (M5+)2011: 12 (M3–4)2011: 302 (M4–5)2011: 68 (M5+)2012: 4 (M3–4)2012: 93 (M4–5)2012: 17 (M5+)2013: 3 (M3–4)2013: 46 (M4–5)2013: 12 (M5+)2014: 6 (M3–4)2014: 62 (M4–5)2014: 4 (M5+)2015: 10 (M3–4)2015: 52 (M4–5)2015: 7 (M5+)20152016: 4 (M3–4)2016: 61 (M4–5)2016: 11 (M5+)2017: 7 (M3–4)2017: 46 (M4–5)2017: 4 (M5+)2018: 9 (M3–4)2018: 48 (M4–5)2018: 8 (M5+)2019: 15 (M3–4)2019: 38 (M4–5)2019: 6 (M5+)2020: 22 (M3–4)2020: 45 (M4–5)2020: 9 (M5+)2021: 25 (M3–4)2021: 37 (M4–5)2021: 5 (M5+)2022: 24 (M3–4)2022: 58 (M4–5)2022: 6 (M5+)2023: 30 (M3–4)2023: 47 (M4–5)2023: 6 (M5+)2024: 23 (M3–4)2024: 59 (M4–5)2024: 7 (M5+)2025: 35 (M3–4)2025: 36 (M4–5)20252026: 52 (M3–4)2026: 31 (M4–5)2026: 5 (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
7.905.11.1938 08:4335 km230 km
7.925.11.1953 17:4825 km203 km
7.901.09.1923 02:5815 km93 km
7.911.03.2011 06:1525.4 km108 km
7.710.11.1930 13:3530 km142 km
7.723.05.1938 07:1815 km156 km
7.602.09.1923 02:4615 km64 km
7.301.09.1923 03:0335 km86 km
7.224.10.1905 03:46250 km204 km
7.216.01.1961 07:2030 km148 km
7.212.03.1909 23:1935 km154 km
7.215.09.1916 07:01100 km126 km
7.211.03.1945 21:3750 km227 km
7.213.03.1909 14:2915 km179 km
7.107.09.1906 18:5235 km177 km

Latest earthquakes

MagnitudeDateDepthDistance
4.711.10.2026 16:2455.8 km12 km
4.907.10.2026 19:1373 km22 km
4.501.10.2026 21:0165 km84 km
3.301.10.2026 12:5140 km49 km
3.601.10.2026 12:3140 km42 km
5.301.10.2026 12:2741.6 km32 km
4.430.09.2026 21:1635 km53 km
3.029.09.2026 13:4850 km35 km
4.928.09.2026 19:4571 km82 km
4.327.09.2026 00:4576.5 km45 km
3.624.09.2026 08:2750 km35 km
3.922.09.2026 06:3450 km84 km
3.116.09.2026 21:1150 km78 km
3.516.09.2026 18:4030 km70 km
5.016.09.2026 15:0777.3 km68 km
3.212.09.2026 07:4920 km32 km
3.312.09.2026 06:5620 km32 km
3.206.09.2026 10:2840 km49 km
4.729.08.2026 15:1734.8 km71 km
3.329.08.2026 14:5550 km49 km
5.822.08.2026 17:0061 km54 km
3.409.08.2026 09:5970 km40 km
3.208.08.2026 07:5560 km13 km
3.407.08.2026 07:4170 km23 km
3.505.08.2026 09:06120 km61 km
3.301.08.2026 09:2220 km45 km
4.417.07.2026 19:4547 km81 km
3.016.07.2026 16:1050 km78 km
3.816.07.2026 00:0143.1 km38 km
3.013.07.2026 06:3250 km35 km
3.008.07.2026 04:2550 km49 km
4.302.07.2026 07:1752.2 km42 km
3.430.06.2026 15:3360 km84 km
3.228.06.2026 15:1950 km74 km
3.226.06.2026 19:3050 km84 km
4.226.06.2026 18:5974.2 km34 km
4.526.06.2026 04:3131.3 km30 km
3.526.06.2026 04:2250 km35 km
3.826.06.2026 04:0062.7 km33 km
3.126.06.2026 03:5250 km35 km
5.826.06.2026 03:4652 km18 km
3.926.06.2026 02:4849.8 km66 km
3.120.06.2026 19:5750 km82 km
4.218.06.2026 18:4338.6 km42 km
3.016.06.2026 12:5050 km78 km
4.416.06.2026 10:5542.4 km59 km
5.416.06.2026 10:4652 km84 km
3.131.05.2026 18:1080 km82 km
3.729.05.2026 21:3836.3 km9 km
4.323.05.2026 06:2049.4 km32 km
3.520.05.2026 15:2330 km66 km
4.412.05.2026 00:0234.3 km76 km
4.406.05.2026 10:06111.8 km76 km
4.123.04.2026 14:5370.8 km24 km
3.619.04.2026 01:5570 km52 km
3.106.04.2026 19:4360 km58 km
4.005.04.2026 23:17138.6 km67 km
3.605.04.2026 15:2450 km84 km
3.805.04.2026 07:3450 km81 km
3.104.04.2026 05:2970 km26 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.