EveryQuake

Earthquakes in British Indian Ocean Territory

187 earthquakes catalogued in and around British Indian Ocean Territory between 1912 and 2026. Recorded measurements; not a forecast.

Last updated 5 August 2026 · merged from 5 catalogues
No records in the last 30 days.
187
recorded earthquakes
M7.7
largest
1912–2026
record span
4.65
mean magnitude
158
epicentre inside the border

By year

Stacked by magnitude; one column per year.

039781912: 1 (M5+)1912192119301939194819571965: 1 (M5+)19661967: 3 (M4–5)1967: 6 (M5+)1968: 3 (M4–5)1968: 1 (M5+)1969: 1 (M5+)1970: 1 (M4–5)19751983: 58 (M4–5)1983: 20 (M5+)1984: 19 (M4–5)1984: 6 (M5+)19841985: 1 (M4–5)1986: 2 (M4–5)1987: 2 (M5+)1988: 1 (M4–5)1988: 1 (M5+)1989: 2 (M4–5)1989: 1 (M5+)1992: 1 (M4–5)19931994: 1 (M5+)1996: 7 (M4–5)1997: 1 (M4–5)1998: 1 (M4–5)1999: 1 (M4–5)2000: 2 (M4–5)2001: 2 (M4–5)2002: 3 (M4–5)2002: 1 (M5+)20022006: 1 (M3–4)2006: 2 (M4–5)2007: 1 (M<3)2007: 1 (M3–4)2007: 3 (M4–5)2007: 1 (M5+)2008: 1 (M<3)2008: 2 (M3–4)2008: 2 (M4–5)2011: 2 (M4–5)20112012: 2 (M3–4)2012: 3 (M4–5)2012: 1 (M5+)2013: 1 (M4–5)2014: 1 (M4–5)2015: 1 (M4–5)2016: 1 (M4–5)2017: 1 (M4–5)2018: 1 (M4–5)2020: 1 (M4–5)20202021: 1 (M4–5)2022: 3 (M4–5)2024: 2 (M3–4)2024: 1 (M4–5)2026: 1 (M4–5)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
7.730.11.1983 17:4614.8 km57 km
6.312.09.1965 22:0226.8 km129 km
6.303.12.1983 17:4324.5 km59 km
6.211.05.1912 17:2610 km121 km
5.902.03.1968 22:0220.1 km57 km
5.811.11.1967 12:1422.5 km59 km
5.701.12.1983 22:2921 km41 km
5.701.12.1983 05:4527.8 km63 km
5.703.07.1987 18:0428.3 km58 km
5.610.06.1988 11:3123.9 km79 km
5.526.04.1984 10:1122.6 km66 km
5.512.12.1983 17:2326.4 km57 km
5.502.12.1983 20:3813.7 km90 km
5.511.11.1967 17:598.4 km66 km
5.530.11.1983 21:429.1 km68 km

Latest earthquakes

MagnitudeDateDepthDistance
4.215.03.2026 20:1010 km57 km
4.917.10.2024 18:170 km94 km
3.113.05.2024 09:0514 km46 km
3.512.05.2024 09:0318 km50 km
4.317.11.2022 00:2710 km109 km
4.506.09.2022 12:5418 km96 km
4.115.07.2022 07:5510 km48 km
4.430.01.2021 10:4910 km81 km
4.423.01.2020 05:594.9 km58 km
4.126.07.2018 00:5216 km45 km
4.029.01.2017 08:5218 km82 km
4.303.04.2016 06:4910 km135 km
4.407.01.2015 07:0818 km72 km
4.222.12.2014 19:4322 km58 km
4.110.11.2013 23:1510 km51 km
5.007.09.2012 06:5812.5 km68 km
3.515.08.2012 03:3516 km56 km
3.106.05.2012 10:4718 km55 km
4.506.05.2012 10:4711.8 km60 km
4.724.01.2012 02:2118 km74 km
4.223.01.2012 06:053.6 km74 km
4.011.08.2011 09:420 km102 km
4.125.06.2011 08:117.9 km131 km
3.621.12.2008 06:0310 km55 km
4.023.02.2008 02:390 km77 km
3.516.02.2008 18:5510 km84 km
4.214.02.2008 10:2816 km60 km
0.014.02.2008 10:2810 km59 km
3.829.12.2007 08:4510 km86 km
5.409.10.2007 03:2213.5 km47 km
4.223.09.2007 09:0318 km67 km
0.023.09.2007 09:0310 km57 km
4.122.09.2007 20:2018 km65 km
4.220.08.2007 09:150 km144 km
3.818.07.2006 07:2410 km50 km
4.014.06.2006 14:1811.2 km88 km
4.215.04.2006 00:0016.8 km62 km
5.302.12.2002 18:2113.5 km66 km
4.428.11.2002 04:5718 km69 km
4.518.02.2002 14:0816 km49 km
4.218.02.2002 14:0114 km37 km
4.006.10.2001 22:160 km69 km
4.325.01.2001 02:4714 km19 km
4.118.07.2000 07:3310 km63 km
4.218.07.2000 06:2610 km73 km
4.423.06.1999 03:1313.5 km69 km
4.116.05.1998 02:040 km30 km
4.216.01.1997 13:3714.4 km72 km
4.630.12.1996 13:5718 km50 km
4.605.09.1996 10:5910 km112 km
4.303.09.1996 18:2810 km118 km
4.403.09.1996 04:4919 km107 km
4.103.09.1996 01:5310 km106 km
4.303.09.1996 01:5119 km100 km
4.431.03.1996 14:1411.5 km74 km
5.029.12.1994 05:1416 km48 km
4.824.11.1992 17:4618 km70 km
4.616.09.1989 13:4710 km77 km
4.928.03.1989 22:3719 km98 km
5.223.03.1989 07:3815.9 km80 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.