EveryQuake

Earthquakes in Viana do Castelo

1,039 earthquakes catalogued in and around Viana do Castelo between 1988 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
1.7
Latest earthquake · depth 20.9 km
03.08.2026 08:35 UTC · from centre 24 km
1,039
recorded earthquakes
M4.9
largest
1988–2026
record span
1.86
mean magnitude
379
epicentre inside the border

By year

Stacked by magnitude; one column per year.

0901811988: 1 (M4–5)19881990: 1 (M<3)1991: 2 (M3–4)19911992: 2 (M<3)1993: 2 (M<3)19941995: 3 (M3–4)1996: 1 (M3–4)19971998: 54 (M<3)1998: 16 (M3–4)1998: 8 (M4–5)1999: 7 (M<3)1999: 4 (M3–4)2000: 2 (M<3)20002001: 6 (M<3)2002: 8 (M<3)2002: 1 (M3–4)2003: 35 (M<3)20032004: 26 (M<3)2005: 18 (M<3)2006: 7 (M<3)2006: 1 (M3–4)20062007: 86 (M<3)2007: 2 (M3–4)2008: 42 (M<3)2009: 58 (M<3)2009: 1 (M3–4)20092010: 93 (M<3)2010: 1 (M3–4)2011: 98 (M<3)2011: 1 (M4–5)2012: 2 (M<3)20122013: 1 (M<3)2013: 1 (M3–4)2014: 3 (M<3)2015: 4 (M<3)2015: 1 (M3–4)20152016: 3 (M<3)2017: 1 (M<3)2018: 6 (M<3)2018: 5 (M3–4)20182019: 5 (M<3)2019: 2 (M3–4)2020: 14 (M<3)2021: 40 (M<3)2021: 3 (M3–4)20212022: 180 (M<3)2022: 1 (M3–4)2023: 61 (M<3)2023: 1 (M3–4)2024: 41 (M<3)20242025: 46 (M<3)2026: 31 (M<3)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
4.917.05.1998 14:4619.4 km34 km
4.718.05.1998 17:498 km40 km
4.421.05.1998 03:0015 km38 km
4.230.05.1998 15:2715 km36 km
4.128.05.1998 21:429.2 km38 km
4.128.05.1998 23:128 km39 km
4.121.05.1998 05:0410 km40 km
4.116.05.1998 12:5110 km37 km
4.026.11.2011 08:1112.4 km49 km
4.031.01.1988 15:0910 km62 km
3.930.05.1998 04:268 km38 km
3.712.06.1998 22:000 km41 km
3.622.05.1998 06:3519.2 km38 km
3.529.09.1995 13:3910 km48 km
3.528.05.1998 21:502 km40 km

Latest earthquakes

MagnitudeDateDepthDistance
1.703.08.2026 08:3520.9 km24 km
1.623.07.2026 04:0921.4 km35 km
1.622.07.2026 10:340 km43 km
2.207.07.2026 05:2020 km39 km
1.627.06.2026 15:2424.2 km50 km
1.621.06.2026 11:4821.1 km15 km
1.605.06.2026 03:2224.2 km57 km
1.601.06.2026 02:3214.6 km38 km
1.829.05.2026 20:5022.4 km47 km
1.729.05.2026 20:3116.1 km38 km
1.927.05.2026 18:1711.7 km37 km
2.222.05.2026 16:5921.5 km35 km
1.522.05.2026 16:0524.5 km39 km
2.222.05.2026 15:5321.5 km38 km
1.721.05.2026 20:4318.7 km37 km
1.720.05.2026 08:2520 km42 km
1.520.05.2026 06:2621.6 km36 km
1.620.05.2026 05:5623.1 km37 km
1.820.05.2026 03:5924.3 km35 km
1.620.05.2026 01:0725.4 km32 km
2.327.04.2026 02:192.7 km50 km
2.122.04.2026 06:060 km54 km
1.618.04.2026 15:030 km52 km
1.715.04.2026 17:1818.8 km42 km
1.631.03.2026 19:1320.7 km48 km
1.719.03.2026 00:5911.6 km52 km
1.827.02.2026 06:5219.7 km44 km
1.524.02.2026 04:163.8 km47 km
1.931.01.2026 07:1120.7 km36 km
2.330.01.2026 21:0819.6 km51 km
1.611.01.2026 07:3320.4 km35 km
2.328.12.2025 13:549 km8 km
2.813.12.2025 01:0018.7 km54 km
1.902.12.2025 00:4619 km43 km
1.630.11.2025 08:3620.7 km42 km
2.127.11.2025 21:3411.7 km42 km
1.827.11.2025 21:2016.5 km35 km
1.527.11.2025 21:1817.2 km43 km
1.827.11.2025 10:581.3 km44 km
1.725.11.2025 04:0724.2 km35 km
1.721.11.2025 18:2522.3 km19 km
1.818.11.2025 16:1522.4 km34 km
1.727.10.2025 21:4033 km50 km
1.918.10.2025 13:2822.2 km34 km
1.914.10.2025 09:1519 km39 km
1.504.10.2025 21:111.4 km44 km
1.723.09.2025 04:0224.2 km42 km
1.719.09.2025 16:5331.2 km44 km
1.717.09.2025 11:300 km49 km
1.610.09.2025 20:5628.1 km45 km
1.608.09.2025 00:2416.6 km51 km
1.502.09.2025 02:3914.5 km40 km
1.511.08.2025 00:047.5 km54 km
2.310.08.2025 15:5530.8 km45 km
1.509.08.2025 14:445.6 km14 km
2.328.07.2025 00:224 km23 km
1.623.07.2025 04:3020.5 km20 km
2.430.06.2025 13:435 km57 km
1.628.06.2025 14:0118.2 km44 km
2.024.06.2025 15:0820.7 km40 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.