Seismic Activity in Western Europe

A damaging earthquake with intensity VII MSK and local magni= tude 5. 1 occurred on November 8, 1983, at 0:49 GMT near the Belgium town of Liege in the border region between Belgium, Germany and the Netherlands. This most severe earthquake in the northwestern part of Central Europe since more than thirty years has well been recorded by the dense seismic station network in West Germany which consists of more than twenty stations situated in the Lower Rhine Embayment and in the adjoining Rhenish Massif. Most of the stations are equipped with modern digital recording systems. Thus high-quality seismograms are available from the region east and southeast of the epicenter covering a distance range between 70 km and 144 km. From these data the source characteristics of the Liege mainshock and of its largest after= shock have been determined in order to get more information on the seismotectonic processes causing the Liege events. 2. Seismic Station Network During the period of 1976 to 1982 the seismic station network in the Lower Rhine Embayment and in the Rhenish Massif was consi= derably enlarged and mostly equipped with digital recording systems (Figure 1). At present there are more than twenty stations in operation. Most of them are operated by the Department of Earthquake Geology of the Geological Institute of the University of Cologne and the Geo= logical Survey of Nordrhein-Westfalen at Krefeld.

Inhalt

Problems of Seismology in Belgium - Problemes Actuels de la Seismologie en Belgique.- Tectonic Features and Seismicity of Western Europe.- Satellite-Determined Stresses in the Crust of Europe.- General Tectonic Frame of Central Europe with Emphasis Given to Neotectonic Movements.- The General Pattern of Seismotectonic Dislocations in Central Europe as the Background for the Liège Earthquake on November 8, 1983.- Seismicity of Western Europe as Determined from ISC Data Files.- The Seismicity of the Rhinegraben Rift System - Source Parameters, Propagation- and Site Effects.- Intraplate Seismic Activity in the Brabant Massif and the Graben Systems of Lower Rhine-Roer and North Sea.- Some notes Concerning the Seismicity in Belgium - Magnitude Scale - Detection Capability of the Belgian Seismological Stations.- Recent Seismicity in Hainaut - Scaling Laws from the Seismological Stations in Belgium and Luxemburg.- Tectonic Approach of the Seismicity in the Southern Belgium and the Northern France.- The Problem of Micro-Earthquakes in the Southern Part of the Netherlands.- Seismicity and Crustal Structure in Italy.- Development of a Program for Radon Measure in Seismic Active Zone, the Case of Mons Basin (Belgium).- Clustering of Seismicity in the Regions of Brabant and Ardennes Massives Before the Liège Earthquake of November 8, 1983.- Catalogue des Séismes Survenus au Moyen Age en Belgique et dans les Régions Voisines.- Problèmes de Sismicité Historique : Exemples de Faux Séismes, de Séismes Méconnus et de Séismes Réinterprétés dans l'ensemble Allemagne / Belgique / Nord-Ouest de la France / Sud de Grande-Bretagne.- The Seismic Event of November 9, 1983 Earthquake or Sonic Boom.- L'événement Sismique du 19 Février 1984 en Provence Occidentale : Séisme Tectonique ou Coup de Terrain Minier?.- Studies of the Liege Earthquake of November 8, 1983.- The Earthquakes of Liège of November 8, 1983 and December 21, 1965.- Phase Recognition and Interpretation at Regional Distances from the Liège Event of November 8, 1983.- The Source Characteristics of the Liège Earthquake on November 8, 1983, from Digital Recordings in West Germany.- Le Mécanisme au Foyer du Séisme de Liège du 8 Novembre 1983.- Macroseismic Map of the Liège Earthquake of November 8, 1983.- Macroseismic Inquiry of the Liège Earthquake of November 8, 1983.- Macroseismic Observations of the Liège Earthquake of November 8, 1983 in the Netherlands.- Macroseismic Observations of the Liège Earthquake on November 8, 1983 in West Germany.- A Temporary Array Search for Aftershocks of the 1983 November 8, Liège, Belgium, Earthquake.- Assessment of Seismic Hazard for NPP Sites in France - Analysis of Several Aftershocks of the November 8, 1983, Liège Earthquake.- Engineering Seismology in Western Europe.- Geological and Mining Aspects of the Liège Area.- Macroseismic Effects of the Liège Earthquake with Particular Reference to Industrial Installations.- Basic Concepts for Seismic Design.- Conceptual and Methodological Approach to the Definition of the "Reference Earthquake" for Nuclear Power Plants.- Fundamentals of Seismic Masonry Design.- Earthquakes and Town-Planning.