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1992 Roermond earthquake : ウィキペディア英語版 | 1992 Roermond earthquake
The 1992 Roermond earthquake occurred on 13 April, around 3:20 AM (1:20 UTC) with a moment magnitude of 5.3 and a maximum Mercalli Intensity of VII (''Very Strong''). It was the strongest recorded earthquake in the Netherlands and in Northwestern Europe. ==Tectonic setting== The city of Roermond lies above the Roer Graben, which forms the southeastern part of the Lower Rhine Graben (or Lower Rhine Embayment). These structures form part of the European Cenozoic Rift System, which formed within the foreland of the Alpine orogeny. The Roer graben formed during the Paleogene and is currently active as shown by the thickening of Quaternary sedimentary rocks into the basin. The graben is bounded by NW-SE trending normal fault systems, with the largest fault being the southwest-dipping Peel Boundary Fault, which displaces the base of the Quaternary sequence by about 175 m. All the major faults show evidence of neotectonics.
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