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

Nikulins, Valerijs; Assinovskaya, B. A.

doi:10.5200/baltica.2018.31.04

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…However, two M = 5 and M = 5.2 earthquakes that occurred in 2004 (Fig. 1C), with epicentres in the Kaliningrad District of Russia (Gregersen et al ., 2007), and some lower‐magnitude seismic activities have been recorded or interpreted from instrumental and historical records (Pačėsa & Šliaupa, 2011; Lazauskienė et al ., 2012; Nikulins, 2017; Nikulins & Assinovskaya, 2018). The seismic activity is related to deeply‐rooted pre‐Quaternary faults in bedrock, of which the most prominent is the west–east striking Telšiai fault zone (Pačėsa & Šliaupa, 2011; Lazauskienė et al ., 2012) (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

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Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

et al. 2021

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Liquefaction can cause deformation of unconsolidated sediment, but specific processes involved and the trigger mechanisms often remain obscured. This study describes multiple deformed sediment layers in a succession of lacustrine sand, silt and clay deposited during the Marine Isotope Stage 5d in north-western Lithuania. The deformation structures (load casts, pseudonodules, ball-and-pillow structures, broken-up laminae and injections) are embedded in ten separate layers of fine-grained, laterally continuous sediments. Detailed mesoscale sedimentological analyses suggest that each deformation event consisted of numerous successive stages of sediment advection facilitated by liquefaction. Low-permeability fine-grained laminae contributed to localized pore-water pressure build-up and lowering of sediment strength. Erosional top surfaces that truncate layers with soft-sediment deformation structures suggest that at least seven deformation events were separated by successive periods of initial erosion and then uninterrupted deposition in the lake. The most likely trigger of the deformation was recurrent palaeoseismic activity possibly linked to a late glacial isostatic adjustment following the Scandinavian Ice Sheet melting after the Saalian glaciation. This study emphasizes the potential role of seismic processes in shaping the sedimentary record of the intraplate region of north-eastern Europe and contributes to constraining the depth of liquefaction, regardless of the actual trigger mechanism.

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Section: Geological Settingmentioning

confidence: 99%

“…(B) Geological map of the study area (modified after Jusienė, 2012). (C) Regional faults and seismic events in the south‐eastern Baltic region (after Gregersen et al ., 2007; Pačėsa & Šliaupa, 2011; Lazauskienė et al ., 2012; Nikulins & Assinovskaya, 2018).…”

Section: Geological Settingmentioning

confidence: 99%

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

et al. 2021

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“…Количество тепловых насосов возросло до 5500, а их общая мощность достигла максимальной величины -76.6 MВт. На основании всего комплекса признаков был сделан вывод об индуцированном характере этого сейсмического события, обусловленного разработкой геотермальных ресурсов [Nikulins, Assinovskaya, 2018]. В.Г.…”

Section: техногенная сейсмичность вбрunclassified

Modern seismological surveys in Latvia from 2008 to 2019 and prospects for their development

Nikulins

2020

Российский Сейсмологический Журнал [Russian Journal of Seismology]

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In Latvia, seismological monitoring has been carried out at Slitere station since 2006. Slitere station is part of the GEOFON international network, with its center at GFZ Potsdam. The use of other stations of the GEOFON network and some stations of national networks of Finland and Estonia allows monitoring the entire East Baltic Region (VBR), including Estonia, Latvia, Lithuania, the Kaliningrad Region of Russia, and the adjacent part of the Baltic Sea (Lat=53.9°N - 59.7°N; Lon=19.4°E - 29.6°E). The impetus for the development of seismological monitoring was the Kaliningrad earthquakes of 2004 with Mw 5.0 and 5.2. The main object of research, in addition to tectonic earthquakes, is man-made seismicity, which prevails in Latvia and in EBR. Because of seismic monitoring for the period from 2008 to 2019, 8 tectonic earthquakes were localized, as well as more than 5640 man-made seismic events. The total number of seismic events localized by the BAVSEN network is 13328, including 1096 teleseismic events. The relevance of seismological monitoring is increasing due to unfavorable geodynamic conditions in the area where some large energy, transport facilities, and agglomerations are located, which requires a study of the seismic regime of the territories around these objects. The main problems of EBR seismic monitoring are associated with the identification of relatively weak seismic events, with a rare network of seismic stations, adverse seismic and geological conditions of the sedimentary cover, and low activity of EBR tectonic earthquakes. The lack of promising methods for recognizing the genesis of seismic events puts this problem in the first place. The prospects for seismological research in Latvia are related to the study of the seismic and geological properties of grounds, seismic micro zoning, monitoring of hydraulic structures, as well as the possibility of creating a National Data Center, within which seismological monitoring can become one of the main methods for radiation safety of EBR.

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“…Marine explosions can occur at any time of the day or week. These are associated with technical, geophysical work at sea, operations on the destruction of WWI and WWII sea mines and naval exercises.Another example of man-made seismicity is the event on June 12, 2015 (08:18:26 GMT) that was identified as a probable induced earthquake caused by the production of geothermal resources in Lithuania, near Klaipeda(Nikulins and Assinovskaya, 2018). The local magnitude of this event reached 2.6 and the depth of the hypocentre 0.9 km.…”

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confidence: 99%

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Centre¹

2020

Summ. Bull. Internatl. Seismol. Cent.

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This is the first 2017 issue of the Summary of the ISC Bulletin, which remains the most fundamental reason for continued operations at the ISC. This issue covers earthquakes and other seismic events that occurred during the period from January to June 2017. Users can search the ISC Bulletin on the ISC website. The monthly Bulletin files are available from the ISC ftp site. For instructions, please see the www.isc.ac.uk/iscbulletin/. This publication contains information on the ISC, its staff, Members, Sponsors and Data providers. It offers analysis of the data contributed to the ISC by many seismological agencies worldwide as well as analysis of the data in the ISC Bulletin itself. This issue also includes seismological standards and procedures used by the ISC in its operations. Notably, this issue contains brief information on the recently released last portion of the Rebuilt ISC Bulletin for the period 1991-2010 that replaced the original ISC Bulletin data. From now on, all ISC hypocenter solutions (1964-present) are based on the ak135 velocity model and all ISC magnitudes (1964-present) are based on the latest robust procedures. We continue publishing invited articles describing the history, current status and operational procedures at those networks that contribute data to the ISC. This time it is the turn for the seismic networks run by the

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

Cited by 8 publications

References 7 publications

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

Repetitive Late Pleistocene soft‐sediment deformation by seismicity‐induced liquefaction in north‐western Lithuania

Modern seismological surveys in Latvia from 2008 to 2019 and prospects for their development

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