Earthquakes in Northern Eurasia最新文献

{"title":"SEISMICITY of ARMENIA and ADJACENT TERRITORIES in 20182019","authors":"G.R. Abgaryan, G.V. Sargsyan","doi":"10.35540/1818-6254.2023.26.05","DOIUrl":"https://doi.org/10.35540/1818-6254.2023.26.05","url":null,"abstract":"Here is the overview of the seismicity of the territory of the Republic of Armenia and surrounding countries for 2018 and 2019. More than 4000 local earthquakes have been processed. N=1417 earthquakes for 2018 and N=1416 earthquakes for 2019 were included in the catalogue of the earthquakes of the Republic of Armenia. Within the Republic the highest level of seismic activity is fixed in the north, and in the source zone of the Spitak earthquake 1988, MLV=6.9, I0=10. Analysis of earthquake recurrence graphs for 2018, 2019 showed that the slope of the earthquake recurrence graphs (2018=0.47 and 2019=0.42 respectively) is slightly lower in absolute value than its average value for 1993–2017 (=0.49). Earthquakes felt on the territory of Armenia for 2018 and 2019 are described.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"31 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139003089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of TAJIKISTAN and ADJACENT TERRITORIES in 2016–2017","authors":"T. Ulubieva, R. S. Mikhailova, L. Risling","doi":"10.35540/1818-6254.2022.25.09","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.09","url":null,"abstract":"In 2016–2017, seismic monitoring of the territory of Tajikistan and adjacent areas was carried out by a network of 7 seismic stations of the Geophysical Survey of the National Academy of Sciences of Tajikistan. In total for 2 years, 17855 earthquakes were registered in the range of KR=8.6–15.9, of which 4882 were small–focus shocks with h<70 km scattered throughout the territory of Southwestern Tien Shan (zone I), Southern Tien Shan (II), Pamir-Hindukush zone of crustal earthquakes (III), and 12973 – with intermediate depths h=70–400 km, located in the Pamir-Hindukush zone IV. 140 earthquakes were felt, for two of them (Gazorchashma earthquake of July 1, 2016 with KR=12.5, I0=6–7 and Karamyk earthquake of May 3, 2017 with KR=14.2, I0=7) the isoseismal maps were constructed and described in separate articles. The strongest earthquakes with a foci in the Earth's crust were grouped in 2016 in the northeast of zone III, on the border with China (June 26, KR=15.3, Mw=6.4 and November 25, KR=15.9, Mw=6.6) and in 2017 – in zone II, on the border with Kyrgyzstan (May 3 and 5 with KR=14.2, Mw=6.0 and 14.1, Mw=5.8 respectively). The strongest earthquake with an intermediate depth of h=230 km occurred on April 10, 2016 with KR=15.1, Mw=6.6 near the southern border of Tajikistan, on the territory of Pakistan. It was felt on the territory of Tajikistan, Kazakhstan, Afghanistan, Pakistan and India. A rare instrumental fact of the seismic field of the Pamir-Hindu Kush earthquakes in 2017 was the registration of the May 6, 2017 earthquake with KR=12.6 (Mw=5.3) with maximum depth of 400 km according to the regional network and 411 km according to the exchange pP-waves in ISC decision. Earlier, only in 1971 a close depth of 405 km was recorded for the November 14 earthquake with KR=9.0. For the region as a whole, in 2016 the maximum seismic energy (E=1.021016 J) was released in zone III, in 2017 – in zone II (E=3.291014 J).","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125092189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of the ALTAI and SAYAN region in 2016–2017","authors":"A. Emanov, A. Emanov, A. Fateev, E. Shevkunova, Podkorytova","doi":"10.35540/1818-6254.2022.25.11","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.11","url":null,"abstract":"The characteristic features of the seismicity of the Altai-Sayan region in 2016–2017 are considered. The stationary seismic network within the reporting period consisted of 52 stations. Upgrading the recording equipment and retrofitting the stations with strong motion sensors was continued. In addition to the stationary network, four local time networks functioned in the region. One of them investigated the seismic process and accumulated data for constructing the Moho boundary using the method of receiving functions in the Altai Republic, the other three were focused on the study of technogenic seismicity in the area of coal minings of the Kemerovo and Novosibirsk regions. During the reporting period, 11424 earthquakes were registered in the region, 58 % of them occurred in the Chui-Kurai zone of the Altai Mountains, for which a brief description of seismicity is given separately. The total seismic energy released in earthquake foci was 6.141012 J in 2016 and 2.381013 J in 2017. The slope of the linear part of the earthquake recurrence chart for 2016–2017 has not undergone significant changes compared to previous reporting periods. The largest earthquake on the territory of the Altai-Sayan region for the reporting period (ML=6.39) occurred on April 4, 2017 at 15h07m in the Zaisan Depression area of the Kazakhstan Republic.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115572894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of KYRGYZSTAN and UZBEKISTAN in 2016 and 2017","authors":"K. Abdrakhmatov, A.G. Frolova, A. Berezina, R. Shukurova, E. V. Pershina, K. Kuchkarov","doi":"10.35540/1818-6254.2022.25.08","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.08","url":null,"abstract":"In 2016 and 2017, seismic observations on the territory of Kyrgyzstan and Uzbekistan were carried out by networks of these countries. Seismic networks of Kyrgyzstan and Uzbekistan included 25 and 39 stations respectively. The catalog of earthquakes for 2016 included 705 events with KR=8.6–15.4. The strongest earthquake in the 2016 catalog was earthquake of November 25 at 14h24m with KR=15.4, located at the territory of neighboring China. Devastating for China, the earthquake caused panic among the residents of the border settlements of our countries. The Kyzyl-Art earthquake, which occurred on June 26, 2016 at 11h17s (KR=15.1) in the south of Kyrgyzstan, was the second by magnitude event in 2016. Its epicenter was located on the northern slope of the Zaalay Range. The Kyzyl-Art earthquake caused numerous aftershock series, which continued until the Aketao event, which had its own aftershock series that lasted until the end of the year. As a result, the number of earthquakes included to the catalog for 2016 increased by 2.3 times compared with 2015. The 2017 catalog of earthquakes included 265 events with KR=8.6–14.5, i.e. the total seismicity in the region decreased by 2.7 compared with previous year. The strongest earthquake in the 2017 catalog (KR=14.5), Karamyk earthquake, occurred on May 3 at 04h47m in the spurs of the Alai Range in the territory of Tajikistan, near the Kyrgyzstan-Tajikistan border. The strong foreshock (KR=12.9) occurred 18 seconds before the main shock. The earthquake accompanied by numerous aftershocks. Another rather strong earthquake (KR=13.2) was registered on September 29 at 13h49 m on the territory of Uzbekistan.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126809350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of ARMENIA and ADJACENT TERRITORIES in 2016–2017","authors":"G. Sargsyan, G.R. Abgaryan, A. Gevorgyan, K.L. Khachkalyan, R.S. Mikhailova","doi":"10.35540/1818-6254.2022.25.05","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.05","url":null,"abstract":"A review of seismicity of the Armenia Republic territory and neighboring countries for 20162017 is carried out, information about seismic stations of Armenia network is given. Testing of a new digital seismograph developed in the city of Gyumri was carried out, example of its recording of perceptible earthquake is given. More than 7000 local earthquakes were processed, 2025 of them are included in the consolidated catalog. Within the Republic, the highest level of seismic activity was recorded in the North, in the source zone of Spitak earthquake 1988 with MLV=6.9, I=10. The recurrence graphs for 2016, 2017 and 19932017 have shown, that the long-term coefficient =0.49 corresponds to its normal value for Caucasus, but its values for 2016 and 2017 are somewhat underestimated as regards to its absolute value. The Spitak earthquake zone was active since June.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123775043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of YAKUTIA in 2016–2017","authors":"S. Shibaev, W. Geissler, B. Kozmin, R.M. Tuktarov, A. Makarov","doi":"10.35540/1818-6254.2022.25.16","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.16","url":null,"abstract":"According to the data of 23 seismic stations of the Yakutia branch of GS RAS, the seismicity monitoring of the territory of the Republic of Sakha (Yakutia) was carried out for 2016–2017. During this period, more than 800 earthquakes with an energy class of KR≥7.1 (magnitude M≥1.7) were registered. This is somewhat more than in 2015 (N=567) and is due to the extension of the time interval of work up to 2 years. The epicenters were located in the zones of interaction between large lithospheric plates: the Eurasian and North American in the Northeastern and Arctic regions, as well as the Eurasian and Amur in the southern regions of Yakutia. The clusters of these events comprised two extended (Arctic-Asian and Baikal-Stanovoy) seismic belts. On the map of epicenters, these zones are displayed as a continuous strip of earthquakes from the Olekma River to the Sea of Okhotsk in the south and in the form of separate groups and clusters of earthquakes between the Laptev and Okhotsk Seas – in the northeast and in the Arctic. The highest seismic activity was noted in the Olekma area, the Stanovoy Ridge and the Aldan Highlands (Southern Yakutia) and the Chersky Ridge and Laptev Sea (in the North-East). Information on the manifestations of local seismicity in the Lena River Delta, where from August 2016 to December 2017 is given. 25 temporary field automatic stations under the joint Russian-German project \"Seismicity and neotectonics of the Laptev Sea region\" (SIOLA) in 2016–2018 operated. The first results of the distribution of Arctic earthquakes in the lower reaches of the Lena River in space, time, by depth and their connection with active tectonics are considered.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FOCAL PARAMETERS of CRIMEAN-BLACK SEA REGION EARTHQUAKES \u0000in 2016–2017","authors":"B. Pustovitenko, E. Eredzhepov, M. Bondar","doi":"10.35540/1818-6254.2022.25.22","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.22","url":null,"abstract":"Focal parameters of twenty-one 2016–2017 earthquakes of the Crimean-Black sea region with KП=6.5–13.1 have been recovered. Solutions of focal mechanisms have been obtained for the four strongest earthquakes. The dynamic source parameters – scalar seismic moment M0, the radius of circular dislocation r0, released stress , shear deformation , apparent stress ησ, radiation friction r, average slip along fault ū, energy of dislocation formation in the source ЕU, moment magnitude Mw – have been restored for twenty-one earthquakes by 149 amplitude spectra using Brune theoretical dislocation model. The type of slip in the source of May 13, 2016, felt an earthquake, which happened near the southern coast of Crimea, is a strike-slip. The June 28, July 22 and October 15, 2016 earthquakes occurred in the Black sea basin under the action of horizontal compressive stress, the type of slip in the source is a reverse fault. In the source of the June 16, 2017 earthquake, a thrust of active rupture wing occurred under the action of horizontal compression stress of the meridional direction. This type of movement is typical for earthquakes in the eastern part of the Crimean-Black Sea region. The mechanism parameters of these earthquakes were used to determine the direction of the source radiation to the recording station to account for relevant amendments in the calculation of the seismic moment M0. In general, average values of M0 and r0 for 2016–2017 earthquakes were within the confidence intervals of long-term dependencies M0(KП), r0(KП). The best correspondence of seismic moment values to the long-term dependencies was obtained for the earthquakes of the June 28, July 22, October 15, 2016 and June 16, 2017, with known focal mechanisms because the corrections for real radiation direction Rφ were introduced in the formula for M0 calculation. For reliable estimates of the spectral and dynamic source parameters of the 2016–2017 Crimean earthquakes, only very clear records of body waves at seismic stations with reliable characteristics of recording equipment were used. The averaging of the source dynamic parameters was done by 2–10 station definitions, which provided a small value of standard deviations. In this regard, quantitative estimates of focal parameters can be classified as reliable for further use for scientific and scientific-applied problems, in particular, for the development of geodynamic models.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131268753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of the EAST BALTIC REGION in 2016–2017","authors":"V. G. Nikulin","doi":"10.35540/1818-6254.2022.25.19","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.19","url":null,"abstract":"Information on seismic monitoring in the East Baltic region for 2016–2017 is presented. During this period of time, several tectonic earthquakes occurred, the epicenters of which are located in the north and northwest of Estonia and in the area of Lake Võrtsjärv. The territory of Estonia and the adjacent waters of the Baltic Sea are still the most seismically active parts of the East Baltic region. Attention is drawn to the inherited nature of seismicity, i.e. in the areas of modern earthquakes, earthquakes had already occurred before the instrumental period. Another feature of several earthquakes in the East Baltic region is their association with meteorite craters, which are most often found in the East Baltic region in Estonia and near it, in the Baltic Sea. As before, the bulk of seismic information is associated with man-made explosions in industrial quarries and in the Baltic Sea. The identification of earthquakes of small magnitude remains an urgent problem.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123018888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEISMICITY of the RUSSIAN PART of EAST EUROPEAN PLATFORM and \u0000ADJACENT TERRITORIES in 2016–2017","authors":"I. Gabsatarova, B. Assinovskaya, S. Baranov, V. Karpinsky, Y. Konechnaya, L. Munirova, L. Nadezhka, N. Noskova, S.I. Petrov, S. Pivovarov, I. Sanina","doi":"10.35540/1818-6254.2022.25.17","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.17","url":null,"abstract":"Seismic observations by 46 stationary seismic stations, including seven temporary seismic stations located in the area of Novovoronezh and Kursk nuclear power plants, and by two arrays were carried out on the Russian territory of the East European Platform. A feature of seismicity in 2016–2017 is a manifestation of swarms of weak earthquakes in the northwest in the Leningrad region and the adjacent territory of Finland, as well as earthquakes on the Ukrainian Shield with Мs(est.)=3.8 in Krivoy Rog, where mass explosions are carried out in mines, but earthquakes of moderate magnitude МL=2.6–3.9 also occur (2007, 2013). Weak earthquakes in the peripheral parts (in the southwest, west and northwest) and in zones associated with paleorift structures: in the northeast – with the Kirov-Kazhim and Central Russian aulacogenes continue to be recorded. Weaker natural seismicity with ML≤2.5 was recorded in Karelia and the regions bordering Finland, near the Kandalaksha Bay, near the Khibiny and Lovozero massifs on the Kola Peninsula and in the territory of the Voronezh crystalline massif.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114349387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GAZORCHASHMA EARTHQUAKE on July 1, 2016 with KR=12.5, Mw=5.0, I0=6–7 (Tajikistan)","authors":"R. U. Juraev","doi":"10.35540/1818-6254.2022.25.25","DOIUrl":"https://doi.org/10.35540/1818-6254.2022.25.25","url":null,"abstract":"The field survey results of the consequences of July 1, 2016 earthquake that occurred on the territory of the Rasht (Garm) district of the Republic of Tajikistan are presented. An analysis of damage to buildings and structures is made and their main reasons are revealed. The intensity map is composed and macroseismic parameters are determined. As result of the complex analysis of the main shock focal mechanism, the aftershocks and faults location, the confinement of the earthquake to the main geological structures of the region is established.","PeriodicalId":126512,"journal":{"name":"Earthquakes in Northern Eurasia","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134424476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}