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Earthquakes in Istok

239 earthquakes catalogued in and around Istok between 1936 and 2025. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
No records in the last 30 days.
239
recorded earthquakes
M6.4
largest
1936–2025
record span
2.31
mean magnitude
41
epicentre inside the border

By year

Stacked by magnitude; one column per year.

021421936: 1 (M5+)19361943195019571958: 1 (M4–5)1959: 1 (M5+)1963: 1 (M5+)19641971: 1 (M4–5)19711972: 1 (M4–5)1977: 1 (M4–5)1978: 1 (M5+)19781980: 2 (M5+)1981: 1 (M3–4)1981: 1 (M4–5)1982: 1 (M3–4)1983: 1 (M5+)1984: 1 (M<3)1984: 1 (M5+)1985: 2 (M<3)1985: 1 (M5+)19851986: 1 (M3–4)1987: 2 (M<3)1988: 1 (M<3)1990: 2 (M<3)1992: 3 (M<3)19921993: 4 (M<3)1995: 5 (M<3)1996: 1 (M3–4)1998: 1 (M<3)1999: 10 (M<3)1999: 2 (M3–4)19992000: 10 (M<3)2000: 3 (M3–4)2000: 1 (M4–5)2003: 10 (M<3)2003: 1 (M3–4)2004: 1 (M<3)2005: 2 (M<3)2005: 2 (M3–4)2005: 1 (M5+)2006: 2 (M<3)20062007: 4 (M<3)2007: 2 (M3–4)2008: 6 (M<3)2009: 34 (M<3)2009: 1 (M3–4)2010: 41 (M<3)2010: 1 (M4–5)2011: 33 (M<3)2012: 1 (M3–4)2012: 1 (M4–5)2013: 4 (M<3)2013: 1 (M3–4)20132014: 3 (M<3)2015: 7 (M<3)2015: 3 (M3–4)2015: 1 (M4–5)2017: 2 (M<3)2018: 1 (M3–4)2018: 1 (M5+)2020: 1 (M<3)2020: 1 (M3–4)20202022: 1 (M<3)2022: 1 (M5+)2023: 2 (M<3)2024: 1 (M<3)2025: 1 (M<3)2025
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
6.426.07.1963 04:1715 km112 km
5.918.05.1980 20:0210.9 km61 km
5.507.12.1985 18:325 km75 km
5.518.05.1980 20:269.8 km63 km
5.329.03.1936 21:2710 km57 km
5.204.01.2018 10:4612.7 km55 km
5.210.07.2005 13:1010.9 km70 km
5.107.09.1984 00:4410.1 km70 km
5.017.06.1959 12:3215 km43 km
5.010.09.1983 06:1411.7 km64 km
5.018.05.1978 02:3710 km70 km
5.019.01.2022 16:5015 km61 km
4.610.03.2010 13:3815 km10 km
4.610.04.1971 02:5841.5 km43 km
4.422.08.2000 06:0613.2 km19 km

Latest earthquakes

MagnitudeDateDepthDistance
2.016.06.2025 15:176.8 km29 km
2.613.03.2024 12:122 km15 km
2.718.08.2023 12:5910.3 km18 km
2.212.07.2023 00:306 km29 km
2.911.07.2022 00:5110 km8 km
5.019.01.2022 16:5015 km61 km
2.302.12.2020 13:4712 km21 km
3.815.01.2020 16:322 km24 km
3.114.09.2018 07:082 km23 km
5.204.01.2018 10:4612.7 km55 km
2.429.09.2017 16:432 km17 km
2.509.01.2017 02:192 km21 km
2.202.03.2015 04:245 km10 km
2.026.02.2015 04:425 km15 km
3.524.02.2015 00:062 km19 km
3.523.02.2015 21:042 km15 km
2.423.02.2015 20:382 km11 km
3.125.01.2015 20:1810 km17 km
2.421.01.2015 23:275 km10 km
2.221.01.2015 02:382 km10 km
2.621.01.2015 01:471 km9 km
4.221.01.2015 01:304.8 km11 km
2.518.01.2015 18:432 km21 km
2.413.12.2014 23:352 km27 km
2.509.12.2014 07:346 km32 km
2.222.06.2014 20:382 km8 km
2.611.12.2013 17:092 km20 km
2.327.06.2013 06:5710 km25 km
2.826.06.2013 16:152 km27 km
3.126.06.2013 16:092 km27 km
2.223.06.2013 00:142 km25 km
4.128.11.2012 01:498 km48 km
3.024.01.2012 10:525 km26 km
1.918.12.2011 20:102 km16 km
1.718.12.2011 01:0615 km9 km
1.409.12.2011 13:150 km21 km
2.125.11.2011 08:340 km28 km
1.422.11.2011 00:080 km26 km
1.513.11.2011 03:150 km29 km
1.613.11.2011 01:240 km27 km
1.319.10.2011 08:460 km26 km
1.516.10.2011 17:365.8 km2 km
1.706.10.2011 19:330 km21 km
1.403.10.2011 02:460 km21 km
1.301.10.2011 19:450 km14 km
1.812.09.2011 10:540 km25 km
1.308.09.2011 21:1615 km27 km
1.622.08.2011 12:150 km21 km
1.522.08.2011 10:020 km21 km
1.620.08.2011 16:240 km16 km
1.320.08.2011 11:270 km20 km
1.516.08.2011 14:230 km21 km
1.309.08.2011 08:1220 km18 km
1.826.07.2011 20:0510 km24 km
2.718.07.2011 19:128 km26 km
2.014.07.2011 15:152 km23 km
1.207.07.2011 18:278.7 km30 km
1.305.07.2011 13:560 km20 km
1.617.06.2011 21:1910 km24 km
1.514.06.2011 13:3216.7 km21 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.