DIKSMUIDE
Earthquake23 March 1933
- Magnitude
- 3.6MWH
- Depth
- –
- Max. int.
- 5
- Belgian time
- 18:481933-03-23
- UTC
- 18:481933-03-23
Main parameters
| Date and time | 1933-03-23 18:48 UTC 1933-03-23 18:48 Belgian time |
|---|---|
| Magnitude | MWH 3.6 |
| Epicentral coordinates | 51.060° N, 3.030° E |
| Maximum intensity | 5 |
| Event ID | ROB 500 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-12 14:19:58 Belgian time
Location map
Macroseismic intensities
Intensities assessed for each municipality by the seismologists of the Royal Observatory, from the official questionnaires sent to the municipalities, letters received, the press and published studies. They make up the Belgian Traditional Macroseismic database (BTM).
- Intensity data points
- 19
- Maximum intensity
- V
- Farthest municipality
- 47km · OUDENAARDE
- Source quality
- C
- I
- II
- III
- IV
- V
- VI
- VII+
- Felt, no degree
- Epicentre
Points by intensity
| Intensity | Points | |
|---|---|---|
| F | 1 | |
| III | 2 | |
| IV | 7 | |
| V | 9 | |
| Total | 19 |
Municipalities assessed with a range (Imin < Imax): 3. Switching between Imin and Imax shows the spread of the assessment.
List of the points (19)
Sources of the intensities
| Source | Points |
|---|---|
| Fourmarier and Somville (1933) | 13 |
| Newspaper articles | 6 |
- Fourmarier P, Somville O (1933). Le tremblement de terre du 23 mars 1933 en Flandre occidentale. Annales de la société géologique de Belgique 56B, 340-350.
Belgian Traditional Macroseismic database: Neefs B, Van Noten K, Vanneste K, Camelbeeck T (2025). The Belgian traditional macroseismic (BTM) database of the twentieth century. Journal of Seismology 29, 1005–1036. doi:10.1007/s10950-024-10266-9
Data set: Neefs B, Van Noten K, Vanneste K, Camelbeeck T (2024). The Belgian Traditional Macroseismic (BTM) Database of the 20th Century [data set]. Royal Observatory of Belgium. doi:10.24414/2b5w-j029
Notes and method
For each municipality, an assessment on the European Macroseismic Scale EMS-98: minimum and maximum intensity (Imin, Imax), equal or forming a range (III–IV) that reflects the spread of the testimonies in the municipality, “F” when the earthquake was felt but no degree could be given.
Points not yet validated in the ROB database (taken as they are into the BTM database): 13.
Seismic activity in the area
Known earthquakes around the epicentre, from the catalogue of the Royal Observatory of Belgium.
Within 10 km of the epicentre
One other earthquake in the catalogue, in 2011. One of them occurred after this one. This is the largest known earthquake in the area.
Latest earthquakes before this one
No earthquake known before this one.
Largest known earthquakes
| Date | Place | Magnitude | Intensity | Distance km |
|---|---|---|---|---|
| 1933-03-23 | This earthquake | MWH 3.6 | 5 | – |
| 2011-08-02 | VELDEGEM (BE) | ML 2.4 | 3 | 8.3 |
Nearest beyond 10 km
| Date | Place | Magnitude | Intensity | Distance km |
|---|---|---|---|---|
| 2026-10-07 | RUISELEDE (BE)sequence of 2 | ML 1.9 | – | 23.1 |
| 1968-12-27 | DE PANNE-KOKSIJDE | ML 2.5 | 5 | 29.5 |
| 2014-07-17 | North Seainduced | ML 2.5 | – | 44.7 |
| 1938-06-12 | ZULZICH-NUKERKEsequence of 7 | ML 4.5 | 5 | 49.6 |
| 1942-06-17 | ZULZICH-NUKERKE | – | – | 49.6 |
Municipality of Ichtegem
No other earthquake known in the catalogue.
Notes and method
Tectonic and induced earthquakes from the Observatory’s catalogue, suspected ones included; quarry blasts, explosions and other events are not counted. Epicentral distances on the WGS84 ellipsoid.
Municipality: 2025 municipal boundaries (Statbel), applied to every earthquake, including those before the merger of municipalities. For an epicentre outside Belgium, only the circular area is given. Each earthquake’s name is the catalogue’s: it may refer to a place near the epicentre.
Magnitude: the one given on each earthquake’s page (ML preferably, otherwise MW or MS); magnitudes of different types are compared as they are.
The epicentres of historical earthquakes are only known to within a few kilometres, sometimes more: whether they fall in the area is indicative. Small earthquakes have only been recorded as the station network grew: the area’s older earthquakes are mostly the largest ones, and recent activity looks more frequent.
When the area holds fewer than 5 other earthquakes, the nearest ones beyond 10 km are listed too, up to 100 km. Sequences (aftershocks, swarms) take a single row there, that of their largest earthquake: an earthquake joins a sequence if it occurs at most 7 days after the previous one and within 5 km of the first.