Research Article| July 01, 2015 Intraplate seismicity in northern Central Europe is induced by the last glaciation Christian Brandes; Brandes 1Institut für Geologie, Leibniz Universität Hannover, Callinstraße 30, 30167 Germany Search for other works this author on: GSW Google Scholar Holger Steffen; Steffen 2Lantmäteriet, Geodatadivisionen, Geodetisk infrastruktur, Lantmäterivägen 2c, 80182 Gävle, Sweden Rebekka 3Department of Geosciences, Uppsala University, Villavägen 16, 75236 Uppsala,...

We analyse the effect of Quaternary glaciations on complex tectonic pattern within southwestern Baltic Sea, a sector transition zone from East European Craton to West Platform. This area comprises Caledonian Trans–European Suture Zone in south and Tornquist north. Multiple fault zones between, with different strike dip angles, characters (normal, thrust/reverse, strike‐slip), document like scars alternately transpressional transtensional stress activities since Palaeozoic. determine...

Summary Geodetic velocity models, derived from Global Navigation Satellite System (GNSS) solutions, interpolate between sparse GNSS measurements to provide a more comprehensive view of horizontal and vertical intraplate deformation. These models contribute improved assessment seismic volcanic hazards, assist in validating geodynamic enable the integration diverse datasets for Earth science studies. Most interpolation techniques are not adequate model distribution, especially velocities where...

The Greenland ice sheet has lost significant mass over the past two decades. More than 58 permanent Global Navigation Satellite System (GNSS) stations on bedrock, which are part of Greenland’s GNSS Network (GNET), measure the deformation continuously. solid Earth displacement processes two-fold: an instantaneous elastic deformation and a slow viscoelastic deformation, can be attributed to glacial isostatic adjustment (GIA). We have gained new insight into...

Glacial isostatic adjustment (GIA) models provide estimates of velocity, gravity, stress, and sea-level change based on ice-loading scenarios from past glaciations. These require extensive input, including ice histories a variety Earth model parameters that describe the 3D structure rheology. Different assumptions can be made regarding material parameters, particularly in terms compressibility, which is described by Poisson’s ratio. Incompressible materials (Poisson’s...

The Tien Shan in Central Asia is the largest intracontinental mountain range world, but it 1500 km away from collision zone between Indian and Eurasian plates. This region has been still focus of numerous geoscientific studies, mainly because its evolutionary history unique position lithosphere plate. So far, seismological data have used to explore origin ongoing seismic activity this region, only one study investigated terrestrial gravity data. In study, a new set, EGM2008, determine...

The growing and melting of continental ice sheets during a glacial cycle is accompanied by stress changes reactivation faults. To better understand the relationship between changes, fault activation time, parameters, slip magnitude, new physics-based two-dimensional numerical model used. In this study, tectonic background magnitudes parameters are tested as well angle locations relative to sheet. Our results show that magnitude for all faults mainly affected coefficient friction within crust...

SUMMARY The West and Central African Rift System (WCARS) is the only stable continental geological structure on Earth that formed by large-scale topographic massifs (swells). However, knowledge of origin evolution WCARS remains limited mainly due to scarcity high-resolution geophysical observations. To better understand crustal beneath entire WCARS, we use XGM2016 global gravitational model ETOPO1 topographic-bathymetric determine a gravimetric Moho (crust-mantle boundary) constrained...

SUMMARY We analyse Global Navigation Satellite System (GNSS) data from Svalbard to understand how uplift rates are controlled by the elastic and viscoelastic response of solid Earth changes in glacier mass on annual, interannual, decadal, centennial millennial timescales. To reveal local patterns deformation, we filter GNSS time-series with an enhanced common-mode filtering technique where non-tidal loading signal is incorporated. This reduces estimated uncertainties for 5-yr 0.8 0.3 mm...

Abstract The effective elastic thickness ( T e ) of the lithosphere provides geophysical information about long‐term flexural strength and can be used to constrain thermorheological properties lithosphere. is typically calculated from spectral analysis gravity topography data; variations in are, however, not well resolved Greenland due poor constraints on crustal structure (including thickness) complications ice loading. In addition, geological tectonic history are sparse thick cover. Here...

Abstract Least-squares collocation (LSC) is a widely used method applied in physical geodesy to separate observations into signal and noise part but has received only little attention when interpolating velocity fields. The advantage of the LSC possibility filter interpolate as well extrapolate observations. Here, we will present several extensions traditional technique, which allows combined interpolation both horizontal components (horizontal (HV)-LSC), separation on different tectonic...

In the stable craton of northeastern Canada moderate seismicity as well glacial isostatic adjustment (GIA) has been observed. We investigate five earthquakes with moment magnitudes between 3.6 and 4.1 that have occurred in northern Hudson Bay since 2007, which may be triggered by GIA. Focal mechanisms are determined using a waveform-fitting procedure for surface waves, best double-couple mechanism is obtained through grid search over strike, dip, rake. All events exhibit thrust-fault...

Due to their large mass, ice sheets induce significant stresses in the Earth's crust. Stress release during deglaciation can trigger large-magnitude earthquakes, as indicated by surface faults northern Europe. Although glacially-induced have been analyzed Europe, they not yet for Greenland. We know that Greenland Ice Sheet experienced a melting period early Holocene, and so here, we analyze first time. Instability occurs southern Greenland, where use combined analysis of past sea level...

The Cretaceous basins of the West and Central African Rift System (WCARS) are characterized by sinistral strike–slip movements observed between Benue Arabian–Nubian microplates. These share a similar basin‐filling structure, history, tectonic processes. They have attracted significant interest in study their geodynamics subsurface structure through geophysical exploration methods. Nevertheless, North Cameroon located this microplate confluence has not yet been investigated terms identifying...

Abstract Greenland's bedrock responds to ongoing ice loss with an elastic vertical land motion (VLM) that is measured by Global Navigation Satellite System (GNSS) Network (GNET). The VLM also contains other contributions, including the long‐term viscoelastic response of Earth deglaciation last glacial period. sheet (GrIS) produces most significant contribution total VLM. peripheral glaciers (PGs) from both Greenland (GrPGs) and Arctic Canada (CanPGs) has not carefully been accounted for in...

Abstract The Rümker region, located in the northern Oceanus Procellarum, is candidate landing region for China's Chang'E‐5 lunar sample‐return mission. area geologically complex and known its volcanic activity. To understand volcanism of we investigate 3D crustal density structure this using Bouguer gravity data from Gravity Recovery Interior Laboratory We applied derivative filters a inversion to resolve both shallow deep structures subsurface. Results indicate that exhibits different modes...

We model the change of Coulomb Failure Stress (δCFS) during Weichselian glaciation up until today at 12 locations in Latvia, Lithuania and Russia that are characterised by soft-sediment deformation structures (SSDS). If interpreted as seismites, these SSDS may point to glacially-induced fault reactivation. The δCFS suggests a high potential such reactivation when it reaches instability zone. show all reached this zone several times last 120,000 years. Most notably, exhibit possibility after...