EveryQuake
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Earthquakes in Østfold

608 earthquakes catalogued in and around Østfold between 1975 and 2016. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
No records in the last 30 days.
608
recorded earthquakes
M3.8
largest
1975–2016
record span
0.99
mean magnitude
396
epicentre inside the border

By year

Stacked by magnitude; one column per year.

01222451975: 1 (M<3)197519781981198419871988: 1 (M<3)1989: 1 (M<3)19901991: 2 (M<3)1992: 1 (M3–4)1993199619992000: 1 (M3–4)20022003: 1 (M<3)2004: 3 (M<3)20052007: 2 (M<3)2008: 21 (M<3)20082009: 245 (M<3)2010: 165 (M<3)2011: 163 (M<3)201120142016: 1 (M<3)2016
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
3.819.02.1992 06:3910 km22 km
3.429.11.2000 22:0710 km45 km
2.629.12.2004 06:340.1 km59 km
2.601.02.1991 13:3210 km54 km
2.606.10.2011 12:410.1 km50 km
2.518.07.2007 13:460.1 km43 km
2.412.09.1988 12:5710 km69 km
2.330.08.2011 13:540.1 km16 km
2.312.11.2007 13:483.8 km39 km
2.323.03.2009 13:550.1 km51 km
2.322.04.1975 15:21—62 km
2.312.04.1991 14:3210 km57 km
2.312.03.1989 07:2510 km57 km
2.230.09.2003 14:560 km35 km
2.230.03.2009 15:210.1 km50 km

Latest earthquakes

MagnitudeDateDepthDistance
2.120.04.2016 16:017 km41 km
1.107.12.2011 14:580 km39 km
0.730.11.2011 14:210.1 km16 km
1.128.11.2011 14:400.1 km14 km
0.924.11.2011 14:010.1 km11 km
1.523.11.2011 14:490.1 km53 km
0.823.11.2011 12:540.1 km46 km
0.422.11.2011 14:280.1 km46 km
0.621.11.2011 15:450.1 km50 km
1.021.11.2011 14:130.1 km41 km
0.818.11.2011 13:290.1 km49 km
0.810.11.2011 13:070.1 km52 km
0.807.11.2011 14:150.1 km66 km
1.007.11.2011 13:430.1 km20 km
1.107.11.2011 12:500.1 km24 km
1.504.11.2011 12:340.1 km55 km
1.328.10.2011 08:490.1 km19 km
0.926.10.2011 13:000.1 km33 km
0.720.10.2011 17:0310.9 km36 km
1.220.10.2011 13:030.1 km63 km
0.620.10.2011 11:590 km51 km
0.417.10.2011 14:100.1 km60 km
1.013.10.2011 16:470.1 km46 km
1.111.10.2011 13:100.1 km15 km
1.010.10.2011 14:140.1 km25 km
2.606.10.2011 12:410.1 km50 km
0.930.09.2011 16:120.1 km39 km
0.529.09.2011 14:060.1 km61 km
1.126.09.2011 14:310.1 km47 km
0.822.09.2011 12:580.1 km66 km
0.422.09.2011 12:550.1 km26 km
1.821.09.2011 11:230.1 km43 km
1.016.09.2011 11:470.1 km17 km
1.515.09.2011 15:352.4 km45 km
1.113.09.2011 12:140.1 km45 km
0.912.09.2011 15:330.1 km61 km
1.005.09.2011 14:120.1 km29 km
0.902.09.2011 10:340.1 km52 km
2.330.08.2011 13:540.1 km16 km
1.130.08.2011 13:180.1 km42 km
1.325.08.2011 09:590.1 km49 km
0.918.08.2011 13:015.1 km61 km
1.109.08.2011 11:340 km63 km
1.108.08.2011 11:550.1 km18 km
0.622.07.2011 13:250 km70 km
1.308.07.2011 12:000.1 km18 km
1.407.07.2011 12:570.1 km64 km
1.030.06.2011 13:550.1 km9 km
1.029.06.2011 14:070.1 km61 km
1.128.06.2011 14:224.9 km64 km
1.528.06.2011 14:050.1 km54 km
0.628.06.2011 13:191.1 km44 km
1.127.06.2011 14:400.1 km61 km
1.527.06.2011 12:410.1 km27 km
0.423.06.2011 11:050.1 km25 km
0.921.06.2011 14:040.1 km1 km
1.221.06.2011 12:460.1 km16 km
0.921.06.2011 07:400.1 km14 km
1.120.06.2011 11:250.1 km62 km
1.516.06.2011 13:330.1 km27 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.