A5016576296- earthquake and tectonic studies
- Landslides and related hazards
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Geological Modeling and Analysis
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Geology and Paleoclimatology Research
- Seismic Performance and Analysis
- Karst Systems and Hydrogeology
- Geological formations and processes
- Geological Formations and Processes Exploration
- Cryospheric studies and observations
- Geological and Geophysical Studies Worldwide
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Geophysical and Geoelectrical Methods
- Geological and Geophysical Studies
- Structural Health Monitoring Techniques
- Winter Sports Injuries and Performance
- Rock Mechanics and Modeling
- GNSS positioning and interference
- Geophysics and Sensor Technology
- Geophysical Methods and Applications
Royal Observatory of Belgium
2015-2024
KU Leuven
2009
University of Mons
2008
In the frame of European Commission project "Seismic Hazard Harmonization in Europe" (SHARE), aiming at harmonizing seismic hazard a scale, compilation homogeneous, parametric earthquake catalogue was planned. The goal to be achieved by considering most updated historical dataset and assessing homogenous magnitudes, with support from several institutions. This paper describes SHARE Earthquake Catalogue (SHEEC), which covers time window 1000–1899. It strongly relies on experience "Network...
Abstract Large earthquakes within stable continental regions (SCR) show that significant amounts of elastic strain can be released on geological structures far from plate boundary faults, where the vast majority Earth's seismic activity takes place. SCR spatial and temporal patterns differ those at boundaries occur in tectonic loading rates are negligible. However, absence a more appropriate model, they traditionally viewed as analogous to their counterparts, occurring when accrual stress...
Abstract Late Quaternary separation of Britain from mainland Europe is considered to be a consequence spillover large proglacial lake in the Southern North Sea basin. Lake inferred have caused breaching rock ridge at Dover Strait, although this hypothesis remains untested. Here we show that opening Strait involved least two major episodes erosion. Sub-bottom records reveal remarkable set sediment-infilled depressions are deeply incised into bedrock interpret as giant plunge pools. These...
From the analysis of geological, geodetic and geophysical data we provide clear evidence seismogenic faults capable producing large earthquakes in intraplate Europe. Previous studies (Paulissen, Vandenberghe & Gullentops 1985; Van den Berg et al. 1994; Geluk 1994) have yielded some constraints on rate crustal deformation along Roer Valley, a graben structure crossing Netherlands, Belgium Germany, allowed us to address fundamental questions: can rupture surface this part 'stable' continental...
As part of a paleoseismological investigation along the Bree fault scarp (western border Roer Graben), various geophysical methods [electrical profiling, electromagnetic (EM) refraction seismic tests, electrical tomography, ground‐penetrating radar (GPR), and high‐resolution reflection profiles] were used to locate image an active zone in depth range between few decimeters tens meters. These investigations, parallel with geomorphological geological analyses, helped decision trench...
Paleoseismic analysis of the 10‐km‐long Bree fault scarp in lower Rhine graben yields numerous lines evidence earthquake activity Holocene and late Pleistocene. This active normal fault, a part Feldbiss system, dips 70°NE is expressed at surface by prominent NW‐SE trending 7 to 20 m high scarp, formed since deposition Maas River main terrace <700 kyr. B.P. Trenches geophysical prospecting show that which known have ∼100 vertical offset Pliocene, breaks Pleistocene deposits....
Northern Europe would typically be classified as a relatively stable continental region where seismic hazard is low. Indeed, in comparison to active zones the Mediterranean, activity low northern and Lower Rhine graben region. Until recently, no one have suspected that normal faults related structures embayment could produce large earthquakes. Yet, on April 13, 1992, an M s = 5.3 earthquake struck city of Roermond Netherlands. This moderate considered major historical events this region, it...
[1] In continental plate interiors, ground surface movements are at the limit of noise level and close to or below accuracy current geodetic techniques. Absolute gravity measurements valuable quantify slow vertical movements, as this instrument is drift free and, unlike GPS, independent terrestrial reference frame. Repeated absolute (AG) have been performed in Oostende (Belgian coastline) eight stations along a southwest-northeast profile across Belgian Ardennes Roer Valley Graben (Germany),...
Abstract Since 2010, Kawah Ijen volcano has been equipped with seismometers, and its extremely acid volcanic lake monitored using temperature leveling sensors, providing unprecedented time resolution of multiparametric data for an acidic lake. The nature stress mass changes the is studied by combining seismic analyses measurements that were made during strongest unrest ever recorded network at Ijen. distal VT earthquake swarm occurred in May 2011 was precursor October caused increase shallow...
ABSTRACT Over a year of seismic observations, ~5000 short duration icequakes were detected by permanent broadband station installed at the Princess Elisabeth base, located ~180 km inland in eastern Dronning Maud Land, East-Antarctica. Icequake detection via waveform pattern recognition indicates presence two dominating clusters events, totalizing ~1500 icequakes. The corresponding icequake locations point towards distinct zones outcropping blue ice areas (BIAs) respectively 4 and 1 from...
Since June 1992, a seismic network of five digital stations has been operating in southwestern Tanzania, with the aim investigating activity and its partitioning regard to depth area between Lake Rukwa Malawi. During period 1992 15 1994 December 31, reliable location was obtained for 199 local earthquakes: 13 were recorded by all stations, 71 four 115 three both P-and S-wave arrival-time measurements. Many earthquakes are located south-eastern part basin, along eastern border 20 km narrow...
On 1580 April 6 one of the most destructive earthquakes northwestern Europe took place in Dover Strait (Pas de Calais). The epicentre this seismic event, magnitude which is estimated to have been about 6.0, has located offshore continuation North Artois shear zone, a major Variscan tectonic structure that traverses Strait. location and two other moderate historical suggests zone or some its fault segments may be presently active. In order investigate possible activity epicentral area AD...
Abstract In regions where strong earthquakes occurred before the deployment of dense seismic and accelerometric networks, intensity datasets can help select appropriate ground motion prediction equations (GMPEs) for hazard studies. This is case Hainaut zone, which was one most seismically active zones in around Belgium during twentieth century. A recent reassessment dataset area showed that intensities this region attenuate much faster with distance than other parts northwestern Europe....
Abstract. The online collection of earthquake reports in Europe is strongly fragmented across numerous seismological agencies. This paper demonstrates how collecting and merging institutional macroseismic data improves the density observations quality intensity shaking maps. Instead using ZIP code Community Internet Intensity Maps, we geocode individual response addresses for location improvement, assign intensities to grouped answers within 100 km2 grid cells, generate attenuation relations...
Abstract Intraplate seismicity is often characterized by episodic, clustered and migrating earthquakes extended after-shock sequences. Can these observations – primarily from North America, China Australia usefully be applied to seismic hazard assessment for intraplate Europe? Existing assessments are based on instrumental historical of the past c. 1000 years, as well some data active faults. This time span probably fails capture typical large-event recurrence intervals order tens thousands...
Damaging earthquakes happened in the Hainaut coal basin (Belgium) 19th and 20th centuries but stopped after mining. We relocated 54 of period 1965 1985 by using regional local seismic phase measurements from recordings around Belgium. These new results finalise earthquake catalogue, derived macroseismic data for 1887–1965 instrumental records 1965. This updated database allows us to discuss origin this intriguing seismicity. Computed focal depths show that strongest before occurred inside...
We propose a method to evaluate the stress generated at local scale by spatial variations of gravitational potential energy (GPE), which is related inhomogeneous topography and mass distribution in lithosphere. show that it possible infer these sources from second derivatives geoid height grid, used as proxy GPE. The coherence validated on passive margin, Bay Biscay. result expected such geological configuration, with extensional maximum horizontal principal parallel margin compressive...