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Earthquakes in Saint Helena

675 earthquakes catalogued in and around Saint Helena between 1917 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
5.4
Latest earthquake · depth 10 km
28.07.2026 01:27 UTC · from centre 510 km
675
recorded earthquakes
M6.4
largest
1917–2026
record span
4.64
mean magnitude
463
epicentre inside the border

By year

Stacked by magnitude; one column per year.

030611917: 1 (M5+)19171925: 1 (M5+)1926: 1 (M5+)19261928: 1 (M5+)1929: 2 (M5+)1932: 1 (M5+)1934: 1 (M5+)19351939: 1 (M5+)1943: 1 (M5+)19441947: 1 (M5+)1948: 1 (M5+)1949: 1 (M5+)1952: 1 (M5+)1953: 1 (M5+)19531954: 1 (M5+)1960: 1 (M5+)1961: 2 (M5+)19621963: 1 (M5+)1964: 2 (M5+)1965: 2 (M4–5)1965: 2 (M5+)1966: 2 (M4–5)1967: 1 (M4–5)1968: 3 (M4–5)1968: 1 (M5+)1969: 1 (M4–5)1969: 1 (M5+)1970: 6 (M4–5)1970: 1 (M5+)1971: 1 (M4–5)1971: 1 (M5+)19711973: 4 (M4–5)1973: 1 (M5+)1974: 5 (M4–5)1974: 3 (M5+)1975: 4 (M4–5)1975: 1 (M5+)1976: 6 (M5+)1977: 3 (M4–5)1977: 5 (M5+)1978: 1 (M4–5)1979: 1 (M4–5)1980: 1 (M4–5)1980: 1 (M5+)19801981: 3 (M4–5)1981: 2 (M5+)1982: 3 (M4–5)1982: 3 (M5+)1983: 6 (M4–5)1983: 3 (M5+)1984: 6 (M4–5)1984: 3 (M5+)1985: 2 (M5+)1986: 3 (M4–5)1987: 3 (M4–5)1987: 1 (M5+)1988: 5 (M4–5)1988: 2 (M5+)1989: 3 (M4–5)1989: 1 (M5+)19891990: 1 (M3–4)1990: 1 (M4–5)1991: 2 (M4–5)1991: 2 (M5+)1992: 7 (M4–5)1992: 5 (M5+)1993: 3 (M4–5)1993: 3 (M5+)1994: 2 (M4–5)1994: 1 (M5+)1995: 1 (M3–4)1995: 3 (M4–5)1995: 3 (M5+)1996: 7 (M4–5)1996: 3 (M5+)1997: 1 (M3–4)1998: 3 (M3–4)1998: 5 (M4–5)1998: 2 (M5+)19981999: 1 (M3–4)1999: 1 (M4–5)1999: 1 (M5+)2000: 3 (M3–4)2000: 1 (M4–5)2000: 3 (M5+)2001: 3 (M3–4)2001: 3 (M4–5)2001: 3 (M5+)2002: 2 (M3–4)2002: 4 (M4–5)2002: 1 (M5+)2003: 4 (M4–5)2003: 2 (M5+)2004: 1 (M3–4)2004: 1 (M4–5)2004: 6 (M5+)2005: 1 (M3–4)2005: 7 (M4–5)2005: 3 (M5+)2006: 3 (M3–4)2006: 12 (M4–5)2006: 3 (M5+)2007: 5 (M3–4)2007: 5 (M4–5)2007: 1 (M5+)20072008: 1 (M3–4)2008: 8 (M4–5)2008: 4 (M5+)2009: 3 (M3–4)2009: 11 (M4–5)2009: 5 (M5+)2010: 5 (M3–4)2010: 5 (M4–5)2010: 3 (M5+)2011: 7 (M3–4)2011: 16 (M4–5)2011: 10 (M5+)2012: 5 (M3–4)2012: 13 (M4–5)2012: 6 (M5+)2013: 1 (M3–4)2013: 12 (M4–5)2013: 4 (M5+)2014: 8 (M3–4)2014: 10 (M4–5)2014: 4 (M5+)2015: 8 (M3–4)2015: 19 (M4–5)2015: 4 (M5+)2016: 4 (M3–4)2016: 12 (M4–5)2016: 4 (M5+)20162017: 1 (M3–4)2017: 7 (M4–5)2017: 5 (M5+)2018: 3 (M3–4)2018: 13 (M4–5)2018: 4 (M5+)2019: 5 (M3–4)2019: 5 (M4–5)2019: 3 (M5+)2020: 7 (M3–4)2020: 9 (M4–5)2020: 7 (M5+)2021: 8 (M3–4)2021: 7 (M4–5)2021: 2 (M5+)2022: 9 (M3–4)2022: 36 (M4–5)2022: 16 (M5+)2023: 4 (M4–5)2023: 2 (M5+)2024: 4 (M3–4)2024: 7 (M4–5)2024: 5 (M5+)2025: 4 (M3–4)2025: 5 (M4–5)2025: 2 (M5+)20252026: 5 (M3–4)2026: 23 (M4–5)2026: 11 (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
6.429.11.1970 06:0117.1 km428 km
6.303.04.1928 16:4210 km533 km
6.324.05.2015 04:5311.7 km711 km
6.225.07.1929 22:5735 km465 km
6.218.06.1998 04:178.7 km425 km
6.221.08.1917 21:3810 km358 km
6.110.03.1947 01:5315 km532 km
6.111.11.2017 00:363.9 km456 km
6.019.05.1934 01:1535 km447 km
6.020.06.1943 17:3935 km434 km
6.024.09.1975 11:0323 km491 km
6.002.05.2017 15:107 km432 km
5.931.01.1953 21:5215 km556 km
5.922.08.1949 20:2615 km522 km
5.923.07.1948 20:5815 km539 km

Latest earthquakes

MagnitudeDateDepthDistance
5.428.07.2026 01:2710 km510 km
5.027.07.2026 22:3210 km639 km
4.818.07.2026 04:0710 km418 km
4.417.07.2026 08:5610 km435 km
4.816.07.2026 21:5010 km405 km
4.116.07.2026 21:150 km454 km
4.016.07.2026 21:030 km491 km
4.316.07.2026 21:0010 km482 km
4.316.07.2026 20:550 km507 km
5.316.07.2026 20:2110 km514 km
5.116.07.2026 19:5510 km471 km
4.216.07.2026 19:5110 km460 km
4.316.07.2026 19:4410 km448 km
4.016.07.2026 19:400 km514 km
4.016.07.2026 19:340 km471 km
4.116.07.2026 19:320 km505 km
4.016.07.2026 19:220 km471 km
4.016.07.2026 19:190 km508 km
3.521.06.2026 07:490 km480 km
4.719.06.2026 00:0010 km538 km
4.402.06.2026 05:1910 km505 km
4.430.05.2026 02:1210 km504 km
4.712.05.2026 10:1610 km606 km
3.512.05.2026 10:160 km587 km
4.027.03.2026 16:350 km513 km
4.917.03.2026 19:530 km359 km
5.014.03.2026 23:3410 km374 km
3.914.03.2026 21:280 km399 km
5.003.03.2026 18:010 km675 km
5.103.03.2026 17:590 km665 km
4.928.02.2026 17:3110 km432 km
3.531.01.2026 14:560 km505 km
3.828.01.2026 04:190 km360 km
5.128.01.2026 02:5810 km445 km
4.328.01.2026 02:040 km449 km
5.328.01.2026 01:5810 km459 km
4.520.01.2026 06:050 km414 km
5.320.01.2026 06:0410 km392 km
5.120.01.2026 05:5510 km401 km
3.505.12.2025 16:380 km498 km
5.129.11.2025 04:200 km574 km
5.028.11.2025 13:2910 km536 km
4.811.11.2025 15:3410 km479 km
4.619.04.2025 18:4610 km410 km
5.019.04.2025 18:450 km469 km
3.612.04.2025 18:5710 km478 km
3.510.03.2025 22:560 km350 km
4.810.03.2025 22:150 km346 km
3.610.03.2025 20:210 km382 km
4.610.03.2025 03:0410 km341 km
4.828.12.2024 05:1010 km540 km
4.928.12.2024 05:0910 km520 km
4.628.12.2024 01:5410 km535 km
4.728.12.2024 01:5310 km545 km
5.028.12.2024 01:5210 km531 km
5.318.11.2024 00:0010 km504 km
5.117.11.2024 23:2410 km508 km
5.117.11.2024 23:1610 km518 km
3.616.11.2024 15:320 km492 km
3.816.11.2024 15:2110 km489 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.