000007579 001__ 7579
000007579 005__ 20250408181542.0
000007579 0247_ $$2DOI$$a10.20341/gb.2025.001
000007579 037__ $$aSCART-2025-0131
000007579 100__ $$aCamelbeeck, Thierry
000007579 245__ $$aThe 1965–1970 seismic episode in the Hainaut coal basin (Belgium): a key period to analyse the triggered nature of a century-long seismic activity
000007579 260__ $$c2025
000007579 520__ $$aDamaging earthquakes happened in the Hainaut coal basin (Belgium) in the 19th and 20th centuries but stopped after coal mining. We relocated 54 Hainaut earthquakes of the period 1965 and 1985 by using regional and local seismic phase measurements from recordings in and around Belgium. These new results finalise the Hainaut earthquake catalogue, derived from macroseismic data for the 1887–1965 period and instrumental records after 1965. This updated database allows us to discuss the origin of this intriguing seismicity. Computed focal depths show that the strongest earthquakes before 1985 occurred inside the Upper Palaeozoic part of the Brabant Parautochton, probably below the deepest parts of the coal mines. The shallowness of this seismicity, its spatial link with the coal basin, the compressive to strike-slip focal mechanisms of the stronger earthquakes between 1965 and 1985 and the large quantity of coal mass removal all match with worldwide observations of miningtriggered earthquakes. The earthquake mechanisms agree with the local, compressive to transpressive stress regime derived from differences in upper crustal density and topography that make the Hainaut area more sensitive to fault reactivation at shallow depths, as observed in similar tectonic settings elsewhere in the world. 
000007579 594__ $$aNO
000007579 6531_ $$aearly-instrumental
000007579 6531_ $$aearthquake relocation
000007579 6531_ $$afocal mechanism
000007579 6531_ $$alocal stress analysis
000007579 6531_ $$atriggered seismicity
000007579 6531_ $$acoal mining
000007579 6531_ $$aHainaut
000007579 6531_ $$aBelgium  
000007579 700__ $$aVan Noten, Koen
000007579 700__ $$aLecocq, Thomas
000007579 773__ $$c1-23$$n1$$pGeologica Belgica$$v28$$y2025
000007579 8560_ $$fkoen.vannoten@ksb-orb.be
000007579 8564_ $$s1943650$$uhttps://publi2-as.oma.be/record/7579/files/Focal mechanisms and local stresses active in the Hainaut region.png$$yFault-plane solutions of the largest earthquakes in the Hainaut coal mining region in relation to the 2nd derivative of the geoid.  The lower figure shows the strong relation between seismic activity (dots) and total coal production produced by all concessions in Hainaut coal area since 1896.
000007579 8564_ $$s16087$$uhttps://publi2-as.oma.be/record/7579/files/Focal mechanisms and local stresses active in the Hainaut region.gif?subformat=icon$$xicon$$yFault-plane solutions of the largest earthquakes in the Hainaut coal mining region in relation to the 2nd derivative of the geoid.  The lower figure shows the strong relation between seismic activity (dots) and total coal production produced by all concessions in Hainaut coal area since 1896.
000007579 8564_ $$s18014$$uhttps://publi2-as.oma.be/record/7579/files/Focal mechanisms and local stresses active in the Hainaut region.jpg?subformat=icon-180$$xicon-180$$yFault-plane solutions of the largest earthquakes in the Hainaut coal mining region in relation to the 2nd derivative of the geoid.  The lower figure shows the strong relation between seismic activity (dots) and total coal production produced by all concessions in Hainaut coal area since 1896.
000007579 905__ $$apublished in
000007579 980__ $$aREFERD