EveryQuake

Earthquakes in Usulután

1,018 earthquakes catalogued in and around Usulután between 1900 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
4.5
Latest earthquake · depth 115 km
28.07.2026 04:16 UTC · from centre 59 km
1,018
recorded earthquakes
M7.8
largest
1900–2026
record span
4.41
mean magnitude
190
epicentre inside the border

By year

Stacked by magnitude; one column per year.

0891781900: 2 (M5+)19001901: 1 (M5+)1906: 1 (M5+)19101915: 1 (M5+)1917: 1 (M5+)1919: 1 (M5+)19201921: 1 (M5+)1924: 1 (M5+)1925: 2 (M5+)1926: 3 (M5+)1927: 1 (M5+)19301932: 2 (M5+)1934: 1 (M5+)1936: 1 (M5+)1938: 1 (M5+)1939: 1 (M5+)19401941: 1 (M5+)1942: 1 (M5+)1945: 1 (M5+)1947: 1 (M5+)19501951: 2 (M5+)1958: 1 (M5+)19601961: 1 (M5+)1963: 1 (M4–5)1964: 2 (M3–4)1964: 3 (M4–5)1964: 3 (M5+)1965: 1 (M4–5)1965: 1 (M5+)1966: 6 (M4–5)1966: 1 (M5+)1967: 1 (M3–4)1967: 4 (M4–5)1967: 1 (M5+)1968: 6 (M4–5)1968: 1 (M5+)1969: 6 (M4–5)1969: 1 (M5+)1970: 2 (M4–5)1970: 1 (M5+)19701971: 2 (M5+)1972: 4 (M4–5)1972: 2 (M5+)1973: 2 (M4–5)1974: 2 (M4–5)1974: 3 (M5+)1975: 4 (M4–5)1976: 6 (M4–5)1976: 5 (M5+)1977: 4 (M4–5)1977: 2 (M5+)1978: 3 (M4–5)1978: 2 (M5+)1979: 6 (M4–5)1980: 5 (M4–5)1980: 1 (M5+)19801981: 4 (M4–5)1981: 1 (M5+)1982: 3 (M4–5)1982: 6 (M5+)1983: 3 (M4–5)1983: 1 (M5+)1984: 5 (M4–5)1984: 1 (M5+)1985: 4 (M4–5)1985: 4 (M5+)1986: 1 (M4–5)1986: 3 (M5+)1987: 6 (M4–5)1987: 1 (M5+)1988: 5 (M4–5)1988: 2 (M5+)1990: 6 (M4–5)19901991: 11 (M4–5)1991: 2 (M5+)1992: 10 (M4–5)1992: 1 (M5+)1993: 17 (M4–5)1993: 1 (M5+)1994: 1 (M3–4)1994: 4 (M4–5)1994: 1 (M5+)1995: 1 (M<3)1995: 2 (M3–4)1995: 9 (M4–5)1995: 1 (M5+)1996: 1 (M3–4)1996: 6 (M4–5)1996: 1 (M5+)1997: 1 (M3–4)1997: 9 (M4–5)1997: 2 (M5+)1998: 1 (M3–4)1998: 8 (M4–5)1998: 2 (M5+)1999: 1 (M3–4)1999: 11 (M4–5)1999: 2 (M5+)2000: 4 (M3–4)2000: 7 (M4–5)2000: 3 (M5+)20002001: 26 (M3–4)2001: 122 (M4–5)2001: 30 (M5+)2002: 1 (M3–4)2002: 23 (M4–5)2002: 5 (M5+)2003: 5 (M3–4)2003: 15 (M4–5)2003: 2 (M5+)2004: 3 (M3–4)2004: 13 (M4–5)2004: 1 (M5+)2005: 1 (M3–4)2005: 16 (M4–5)2005: 3 (M5+)2006: 3 (M3–4)2006: 15 (M4–5)2006: 4 (M5+)2007: 2 (M<3)2007: 1 (M3–4)2007: 14 (M4–5)2007: 2 (M5+)2008: 1 (M<3)2008: 2 (M3–4)2008: 17 (M4–5)2008: 2 (M5+)2009: 9 (M4–5)2009: 1 (M5+)2010: 5 (M4–5)2010: 3 (M5+)20102011: 8 (M4–5)2011: 2 (M5+)2012: 1 (M3–4)2012: 16 (M4–5)2012: 4 (M5+)2013: 10 (M4–5)2013: 2 (M5+)2014: 1 (M3–4)2014: 12 (M4–5)2014: 4 (M5+)2015: 2 (M3–4)2015: 11 (M4–5)2015: 3 (M5+)2016: 1 (M3–4)2016: 14 (M4–5)2016: 1 (M5+)2017: 4 (M4–5)2018: 39 (M3–4)2018: 25 (M4–5)2018: 10 (M5+)2019: 3 (M3–4)2019: 13 (M4–5)2019: 6 (M5+)2020: 4 (M3–4)2020: 11 (M4–5)20202021: 2 (M<3)2021: 4 (M3–4)2021: 11 (M4–5)2021: 2 (M5+)2022: 1 (M<3)2022: 5 (M3–4)2022: 15 (M4–5)2022: 2 (M5+)2023: 6 (M<3)2023: 8 (M3–4)2023: 11 (M4–5)2023: 3 (M5+)2024: 10 (M<3)2024: 4 (M3–4)2024: 19 (M4–5)2024: 3 (M5+)2025: 1 (M<3)2025: 11 (M3–4)2025: 24 (M4–5)2025: 5 (M5+)2026: 4 (M3–4)2026: 12 (M4–5)2026: 2 (M5+)2026
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
7.807.09.1915 01:2080 km86 km
7.713.01.2001 17:3357.6 km52 km
7.327.08.2012 04:3716 km146 km
7.314.10.2014 03:5163.9 km103 km
7.319.06.1982 06:2176.3 km102 km
7.228.03.1921 07:4915 km151 km
7.121.05.1932 10:1015 km51 km
7.108.02.1926 15:1820 km127 km
7.108.10.1901 02:140 km166 km
7.005.11.1926 07:5515 km195 km
7.009.11.1900 13:12173 km
7.009.11.1900 16:100 km173 km
6.708.06.1917 00:5115 km106 km
6.701.05.1924 19:5420 km127 km
6.629.06.1919 23:1420 km124 km

Latest earthquakes

MagnitudeDateDepthDistance
4.528.07.2026 04:16115 km59 km
3.815.07.2026 14:3768.9 km33 km
4.229.06.2026 21:2761.2 km63 km
4.429.06.2026 21:2752.8 km68 km
4.005.06.2026 12:2751.9 km36 km
3.219.05.2026 13:224.6 km42 km
4.023.04.2026 14:0964 km61 km
4.216.04.2026 18:4058.8 km63 km
4.030.03.2026 05:1558.9 km68 km
4.926.03.2026 22:11106.1 km52 km
4.621.03.2026 14:18102 km32 km
5.315.03.2026 05:0066 km87 km
5.304.03.2026 18:5652 km83 km
3.727.01.2026 23:5568 km62 km
4.227.01.2026 21:06189.7 km47 km
3.323.01.2026 13:584.4 km51 km
4.006.01.2026 17:0783.7 km39 km
4.102.01.2026 06:2883 km22 km
3.528.12.2025 09:55210.1 km19 km
3.424.12.2025 02:131.6 km12 km
3.222.12.2025 16:0498.6 km50 km
4.217.12.2025 07:1772.7 km60 km
4.929.11.2025 06:5284.3 km58 km
4.217.11.2025 04:2266.2 km62 km
3.111.11.2025 18:0975.1 km39 km
4.909.11.2025 01:4970.8 km32 km
4.106.11.2025 05:2169.4 km31 km
3.227.10.2025 16:2675.7 km47 km
4.226.10.2025 02:36230.6 km53 km
4.610.10.2025 06:27171.5 km72 km
4.024.09.2025 01:4619.8 km28 km
4.221.08.2025 08:2215 km53 km
4.126.06.2025 12:3472.2 km77 km
3.719.06.2025 16:2671.8 km44 km
3.818.06.2025 12:4863.6 km45 km
5.418.06.2025 11:5779.5 km41 km
4.629.05.2025 16:2771.9 km74 km
5.122.05.2025 18:3267.9 km57 km
4.018.05.2025 05:5252.9 km58 km
4.014.05.2025 22:3948.7 km77 km
4.610.05.2025 18:3651.9 km33 km
2.804.05.2025 23:4310 km54 km
5.125.04.2025 14:1151 km66 km
4.224.03.2025 08:05166.5 km28 km
5.020.03.2025 08:1553.7 km36 km
3.519.03.2025 06:566.7 km30 km
4.619.03.2025 02:47149.6 km75 km
4.114.03.2025 22:4355.7 km77 km
4.112.03.2025 19:3659.3 km60 km
3.812.02.2025 20:199.7 km31 km
3.612.02.2025 19:479.5 km31 km
4.008.02.2025 23:328 km56 km
4.407.02.2025 05:36207.2 km34 km
3.905.02.2025 15:516.3 km31 km
4.102.02.2025 12:5188.4 km59 km
4.217.01.2025 18:4065.6 km67 km
4.206.01.2025 04:5957.8 km71 km
6.205.01.2025 17:1846 km91 km
4.002.01.2025 21:2323.6 km63 km
4.113.12.2024 11:268 km60 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.