Vertical crustal movements in Estonia determined from precise levellings and observations of the level of Lake Peipsi

Kall, Tarmo; Liibusk, Aive; Wan, J; Raamat, R

doi:10.3176/earth.2016.03

Cited by 10 publications

(3 citation statements)

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“…6 Seismotectonics of Lake Võrtsjärv area, Estonia: 1 -magnitude of modern earthquakes; 2 -magnitudes of historical earthquakes; 3 -deeply located zones of dislocations in the crystalline basement from geophysical data (Pobul, Sildvee 1975); 4 -zones of dislocations in the crystalline basement and sedimentary cover according to drilling data (Vaher 1983;Tuuling 1990); 5 -alleged zones of dislocations; 6 -the model of velocity of vertical crustal movements EST2015LU (Kall et al 2016); 7 -seismic stations of the BAVSEN network 21st century was also noted in the Gulf of Finland, including its eastern part.…”

Section: Seismicity Of the Saint Petersburg Region Earthquake On 11 Jmentioning

confidence: 99%

Seismicity of the East Baltic region after the Kaliningrad earthquakes on 21 September 2004

Nikulins¹,

Assinovskaya²

2018

Baltica

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For a long time, the north-western part of the East European Craton, specifically the East Baltic region (EBR), was considered an aseismic territory. Historical earthquakes did take place in the EBR, but they occurred rarely and could not always be associated with tectonic conditions. The attitude towards seismicity of the region began to change after the Osmussaar earthquake on 25 October 1976 (M = 4.7) and especially after the Kaliningrad earthquakes on 21 September 2004 (Mw = 5.0; Mw = 5.2). In this study, the seismicity of the EBR was generalized over 13 years after the Kaliningrad region earthquakes on the basis of Scandinavian and our own data. In several cases focal mechanisms were solved for weak earthquakes. The study showed a tendency of seismic activity to decrease from northwest to southeast, a predominant concentration of earthquakes sources in the East Baltic coastal zone, and the activation of Ladoga-Bothnia, Vyborg, Olaine-Inčukalns, Võrtsjärv zones. The main problems are associated with a rare seismic network, high level of ambient seismic noise, and a large number of man-made sources.

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Section: Seismicity Of the Saint Petersburg Region Earthquake On 11 Jmentioning

confidence: 99%

Seismicity of the East Baltic region after the Kaliningrad earthquakes on 21 September 2004

Nikulins¹,

Assinovskaya²

2018

Baltica

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“…Prominent applications include crustal deformation monitoring (e.g., Amoruso et al, 2005;D'Anastasio et al, 2006;Kostoglodov et al, 2001;Schlatter et al, 2005), measuring glacial isostatic adjustment (e.g., Kall et al, 2014;Koohzare et al, 2008;Mäkinen & Saaranen, 1998), the estimation of land subsidence due to the withdrawal of subsurface fluids or gasses (e.g., Chi & Reilinger, 1984;Hsu et al, 2015;Liu & Huang, 2013), volcanology (e.g., Dzurisin et al, 2002;Lanari et al, 2004;Poland et al, 2017), and natural disaster monitoring (e.g., Albattah, 2003;Dobrovolsky, 2006;Rikitake, 1972). Although continuous Global Positioning System (GPS) measurements provide a higher temporal sampling (e.g., daily solutions), and interferometric synthetic aperture radar (InSAR) provides a greater spatial coverage and resolution, leveling remains the most precise method for measuring height differences (e.g., Fuhrmann et al, 2015;Guglielmino et al, 2011;Kall et al, 2016) and usually provides the longest temporal coverage due to the availability of historical measurements that can date back more than 100 years in some countries (e.g., Bilham, 2001;Giménez et al, 2000;Kooi et al, 1998). Consequently, repeat leveling is now commonly utilized in multisensor programs for the measurement of VLM (e.g., Aobpaet et al, 2013;Tizzani et al, 2015;Vestøl, 2006).…”

Section: Introductionmentioning

confidence: 99%

On the Use of Repeat Leveling for the Determination of Vertical Land Motion: Artifacts, Aliasing, and Extrapolation Errors

2018

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Leveling remains the most precise technique for measuring changes in heights. However, for the purposes of determining vertical land motion (VLM), a time series of repeat leveling measurements is susceptible to artifacts and aliasing that may arise due to systematic errors, seasonal surface fluctuations, motions occurring during a survey, and any inconsistencies in the observation conditions among epochs. Using measurements from 10 repeat leveling surveys conducted twice yearly along a profile spanning ~40 km across the Perth Basin, Western Australia, we describe the observation, processing, and analysis methods required to mitigate these potential error sources. We also demonstrate how these issues may lead to misinterpretation of the VLM derived from repeat leveling and may contribute to discrepancies between geologically inferred rates of ground motion or those derived from other geodetic measurement techniques. Finally, we employ historical (~40‐year‐old) leveling data in order to highlight the errors that can arise when attempting to extrapolate VLM derived from a geodetic time series, particularly in cases where the long‐term motion may be nonlinear.

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“…Les rives sablonneuses sont les plus dynamiques, fournissant environ 16 % du littoral total de l'Estonie, long d'environ 3800 km (figure 3). Les activités de la mer et de la glace sont clairement visibles sur les plages de sable situées dans les zones de soulèvement terrestre avec une vitesse maximale de 3 mm/an (Vallner et al, 1988 ;Kall et al, 2016). Bien qu'entourée par la mer Baltique aux eaux peu profondes et sans marées (<10 cm), les ondes de tempête et les fluctuations du niveau de l'eau façonnent les habitats proches du littoral et entravent leur développement.…”

Section: Introductionunclassified

Risques naturels et fragilités des paysages dynamiques de dunes côtiers

Anderson¹,

Koff²,

Kont³

et al. 2018

dynenviron

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English text p. 300 Résumé Définies dans la Directive Habitats comme habitat prioritaire, des dunes fixées à végétation herbacée (dunes grises) apparaissent autour des côtes européennes. Faisant partie de nombreux systèmes de dunes côtières, ces habitats sont particulièrement complexes, ont une faible résilience et nécessitent une attention particulière du point de vue de la conservation et de la gestion. Pendant près d'une décennie, nous avons étudié des exemples représentatifs de dunes fixées en Estonie. En raison de la pression anthropique croissante et des changements globaux actuels, il est essentiel de distinguer ces changements et d'analyser les tendances générales du développement des dunes grises. Les sites sélectionnés, Keibu (situé sur la côte NO de l'Estonie continentale) et Ruhnu (située sur la côte est de l'île de Ruhnu), sont des exemples représentatifs de l'Estonie, avec une couverture de portée géographique et de variation écologique. Les deux sites font partie de zones de conservation et de surveillance. Sur chaque site, nous avons compilé un profil de paysage pour visualiser la topographie, la végétation et les sols. Cette étude a été réalisée sur des profils de paysages perpendiculaires

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Vertical crustal movements in Estonia determined from precise levellings and observations of the level of Lake Peipsi

Cited by 10 publications

References 0 publications

Seismicity of the East Baltic region after the Kaliningrad earthquakes on 21 September 2004

Seismicity of the East Baltic region after the Kaliningrad earthquakes on 21 September 2004

On the Use of Repeat Leveling for the Determination of Vertical Land Motion: Artifacts, Aliasing, and Extrapolation Errors

Risques naturels et fragilités des paysages dynamiques de dunes côtiers

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