scholarly journals SEISMICITY of the CARPATHIANS in 2015

2021 ◽  
pp. 31-42
Author(s):  
S. Verbitsky ◽  
R. Pronishin ◽  
V. Prokopishin ◽  
A. Stets’kiv ◽  
M. Chuba ◽  
...  
Keyword(s):  
Seismic Activity ◽  
Seismic Energy ◽  
Earthquake Source ◽  
Epicentral Area ◽  
The Carpathians ◽  
Carpathian Region ◽  
Vrancea Zone ◽  
Maximum Earthquake ◽  
Academy Of Sciences ◽  
Catalogue Of Earthquakes

The article describes seismic observations in the Carpathian region in 2015, which were carried out, as before, by two organizations from two states: in Ukraine – the Seismicity department of the Carpathian region of the Institute of Geophysics of the NAS of Ukraine, in Moldova – the Seismology laboratory of the Institute of Geology and Seismology of the Academy of Sciences of Moldova. 20 stationary digital stations with a processing center in L'viv and six stations with a center in Chisinau operated in Ukraine and Moldova respectively. Different programs, local hodographs and magnitudes were used. The consolidated catalogue of earthquakes was created in L'viv. The total number of earthquakes in 2015 was NΣ=164 in the ranges: KR=4.7–12.2, h=1–160 km. The total seismic energy ΣE=5.381012 J. 23 earthquakes with depths h=50–160 km were located in the Vrancea zone. The maximum earthquake with KR=12.2 was registered on January 24 in the Vrancha mountains with hрР=89 km. In the Precarpathian region, nine events with energy classes KR=4.7–8.9 were registered, the total seismic energy of which is ΣЕ=1.25109 J. Increased seismic activity was observed in Transcarpathia. A series of tangible earthquakes with aftershocks was recorded in the Tyachiv area. Their total number was NΣ=77. The strongest tangible earthquake occurred in the area of Okrugla village on July 19 with KR=11.1. The earthquake source is located in the Earth's crust at a depth of h=7.7 km. The earthquake was felt by the population in the epicentral area with an intensity of I=6. In addition, this earthquake, like 5 others, was felt in the territory of northern Romania. In general, a decrease in the seismicity level in the Carpathians in 2015 was observed compared to that in 2013 and 2014.

scholarly journals CARPATHIANS

2020 ◽  
pp. 27-37
Author(s):  
S. Verbitsky ◽  
R. Pronishin ◽  
V. Prokopishin ◽  
A. Stetskiv ◽  
M. Chuba ◽  
...  
Keyword(s):  
Seismic Station ◽  
Seismic Energy ◽  
Earthquake Source ◽  
National Academy Of Sciences ◽  
The Carpathians ◽  
Carpathian Region ◽  
Vrancea Zone ◽  
Active Zones ◽  
Maximum Earthquake ◽  
Academy Of Sciences

The article describes seismic observations in the Carpathian region in 2014, which were carried out, as before, by two organizations from two states: in Ukraine – the Seismicity Department of the Carpathian region of the Institute of Geophysics of the National Academy of Sciences of Ukraine, in Moldova – the Seismology Laboratory of the Institute of Geology and Seismology of the Academy of Sciences of Moldova. In Ukraine, 20 stationary digital stations and 3 temporary ones worked in the Dniester energy complex with a processing center in Lviv, in Moldova - six stations with a center in Chisinau. Different programs, local hodo-graphs and magnitudes were used. The consolidated catalog of earthquakes was created in Lviv. A map of epi-centers and a table of the distribution of earthquakes of different classes by region are given. The total number of earthquakes in 2014 was NΣ=81 in the range KP =5.2–14.3 with the interval of hypocenter depths h=1–154 km and the total seismic energy ΣE=2.11·1014 J. Of these, 18 earthquakes with depths h=77–154 km located in the Vrancea zone. The maximum earthquake with KP=14.3 was registered on November 22 in the Precarpathian Trough with hрР=37 km. In the Vrancha mountains the maximum earthquake occurred on March 29 with the KP=12.5 and hрР=136 km. In the Precarpathian and Transcarpathian regions, all earthquakes were weaker. The most powerful event in Transcarpathia was a perceptible earthquake that occurred near the Trostnyk seismic station on November 15 with KP=8.9. The earthquake source is located in the Earth's crust at a depth of h=10 km. The earthquake was felt by the population of the Dyakovo, Trostnyk, Fanchykovo villages with the intensity of 5 and 4–5. In general, in all the seismically active zones of the Carpathians in 2014, there was a slight increase in the level of seismicity compared to that in 2013.

scholarly journals CARPATHIANS

2019 ◽  
pp. 32-42 ◽  
Author(s):  
S. Verbitskii ◽  
R. Pronishin ◽  
Iu. Verbitskii ◽  
M. Chuba ◽  
I. Keleman ◽  
...  
Keyword(s):  
Seismic Station ◽  
Seismic Energy ◽  
Earthquake Source ◽  
Depth Interval ◽  
National Academy Of Sciences ◽  
Carpathian Region ◽  
Vrancea Zone ◽  
Active Zones ◽  
Academy Of Sciences ◽  
The Village

The seismic observations in the Carpathian region in 2013, which were conducted, as before, by two organizations from two states: in Ukraine, by the seismicity department of the Carpathian region of the Institute of Geophysics of the National Academy of Sciences of Ukraine, and in Moldova by the seismology laboratory of the Institute of Geology and Seismology of the Academy of Sciences of Moldova are described. There were 19 digital stations with a processing center in Lviv, Ukraine, and 6 stations with a center in Chisinau, Moldova. Various programs, local hodographs, and magnitudes were used. The consolidated catalog of earthquakes is created in Lviv. The map of epicenters and the table of the distribution of earthquakes of differ-ent classes by regions are given. The total number of earthquakes in 2013 was N=98 in the range of КР=5.7–14.1 and the depth interval of hypocenters h=1–150 km with total seismic energy Е=1.331014 J. Of these, 19 earthquakes with depths h=80–160 km is located in the Vrancea zone. Two maximum earth-quakes with КР=14.1 and КР=12.3 were recorded on October 6 and 15 in the Vrancea mountains with h=139.8 and 140.9 km. In Forecarpathians and Transcarpathia all earthquakes are weaker. The most significant event in Transcarpathia was the earthquake on April 4, 2013, with КР=8.4 in the area of «Nizhnее Selishche» seismic station. The earthquake source is located in the earth's crust at a depth of h=1.7 km. The earthquake was felt by the population of the Village Nizhnее Selishche with an intensity I=3–4. In general, in all seismic active zones of the Carpathians in 2013, there was a slight increase in the level of seismicity compared with that in 2012.

scholarly journals KOPETDAG

2020 ◽  
pp. 82-91
Author(s):  
G. Saryeva ◽  
Nataliya Petrova ◽  
L. Bezmenova
Keyword(s):  
Seismic Activity ◽  
Earthquake Swarm ◽  
Process Intensification ◽  
Background Level ◽  
Seismic Energy ◽  
Strong Earthquakes ◽  
The North ◽  
Mobile Stations ◽  
Academy Of Sciences ◽  
The Town

In 2014, seismic monitoring in the Kopetdag region was carried out by a network of 29 seismic stations (20 stationary and nine mobile stations) of the State Seismological Service of the Academy of Sciences of Turkmenistan (SSS ANT), which in April became part of the newly formed Institute of Seismology and Atmo-spheric Physics, ANT. In total, 225 earthquakes with KP≥8.6 were recorded during the year, and focal mechanisms for 24 events were determined. Seismic process intensification continued around the town of Magtymguly. This began in April 2012 with earthquake swarm and continued in 2012–2014 with a series of earthquakes along the borders of the mobile blocks of the earth’s crust in the north of the Iranian plate, at the zone of its contact with Eurasia. On February 13 the strongest earthquake in Turkmenistan in 2014 with KP=12.8 occurred. It was located near the place of the April 2012 swarm. In June 2014 a seriesof more than of more than 2000 earthquakes with KP=4–10 was recorded 60 km east of this earthquake. This indicates a continued seismic activity and the possibility of strong earthquakes here. In the Kopetdag region as a whole, the seismic activity A10 and the seismic energy E released for 2014 reached the background level, after lowering of these parameters noted over the past several years compared to the average annual values for the period 1993–2013.

A Predictive Model of Daily Seismic Activity Induced by Mining, Developed with Data Mining Methods

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Jacek Jakubowski
Keyword(s):  
Data Mining ◽  
Seismic Activity ◽  
Longwall Mining ◽  
Seismic Energy ◽  
Threshold Value ◽  
Classification Model ◽  
Complex Nature ◽  
Basic Characteristics ◽  
Energy Emissions ◽  
Short Term Prediction

AbstractThe article presents the development and evaluation of a predictive classification model of daily seismic energy emissions induced by longwall mining in sector XVI of the Piast coal mine in Poland. The model uses data on tremor energy, basic characteristics of the longwall face and mined output in this sector over the period from July 1987 to March 2011. The predicted binary variable is the occurrence of a daily sum of tremor seismic energies in a longwall that is greater than or equal to the threshold value of 105 J. Three data mining analytical methods were applied: logistic regression,neural networks, and stochastic gradient boosted trees. The boosted trees model was chosen as the best for the purposes of the prediction. The validation sample results showed its good predictive capability, taking the complex nature of the phenomenon into account. This may indicate the applied model’s suitability for a sequential, short-term prediction of mining induced seismic activity.

scholarly journals Glacial rumblings from Jakobshavn ice stream, Greenland

2009 ◽  
Vol 55 (191) ◽  
pp. 389-399 ◽  
Author(s):  
J.A. Rial ◽  
C. Tang ◽  
K. Steffen
Keyword(s):  
Seismic Activity ◽  
Seismic Energy ◽  
Seismic Events ◽  
Earthquake Activity ◽  
Mass Wasting ◽  
Close Inspection ◽  
Seismic Amplitude ◽  
Ice Stream ◽  
Long Duration ◽  
Seismographic Network

AbstractThe steep increase in Greenland’s glacial earthquake activity detected by the Global Seismographic Network since the late 1990s suggests that a close inspection of these events might provide clues to the nature and origin of such seismic activity. Here we discuss the detection of large, unexpected seismic events of extraordinarily long duration (10–40 min) occurring about once every 2 days, and localized in the ice stream that feeds the Earth’s fastest-moving glacier (Jakobshavn Isbræ) from the east. These ‘glacial rumblings’ represent an ice-mass wasting process that is greater and more frequent than glacial earthquakes have suggested. Probably triggered by calving, the rumblings are all very similar regardless of duration, and all end with a sharp, earthquake-like event in which the largest seismic amplitude is in the rumbling and that might signal the collapse of large ice masses upstream. By calculating the total amount of seismic energy released as rumblings, we estimate that the maximum seasonal amount of ice moved seismogenically down the ice stream is up to 12 km3, or ∼30% of the average annual iceberg discharge in Jakobshavn.

scholarly journals The Pollino 2012 seismic sequence: clues from continuous radon monitoring

2016 ◽  
Author(s):  
Antonio Piersanti ◽  
Valentina Cannelli ◽  
Gianfranco Galli
Keyword(s):  
Seismic Energy ◽  
Detection Algorithm ◽  
Change Point Analysis ◽  
Radon Emanation ◽  
Seismic Sequence ◽  
Epicentral Area ◽  
Quantitative Evidence ◽  
The Impact ◽  
Radon Monitoring

Abstract. The 2012 Pollino (Calabria, Italy) seismic sequence, culminating in the Mw 5.2 earthquake of October 25, 2012, is investigated exploiting data collected during a long term continuous radon monitoring experiment performed in the epicentral area from late 2011 to the end of 2014. We analyze data collected both using a phenomenological approach based on quantitative evidence and a purely numerical analysis including: i) correlation and cross-correlation investigations; ii) an original approach aimed to limit the impact of meteorological parameters variations on the interpretation of measured radon levels; iii) a change point analysis; iv) the implementation of an original detection algorithm aimed to highlight the connections between radon emission variations and major seismic events occurrence. Results from both approaches suggest that radon monitoring stations can be subject to massive site effects, especially regarding rainfall, making data interpretation harder. The availability of long term continuous measurements is crucial to precisely assess those effects. Nevertheless, statistical analysis shows a viable approach for quantitatively relating radon emanation variations to seismic energy release. Although much work is still needed to make radon timeseries analysis a robust complement to traditional seismological tools, this work has identified a characteristic variation in radon exhalation during the preparation process of large earthquakes.

scholarly journals GLOBAL EARTHQUAKES

2020 ◽  
pp. 235-243
Author(s):  
S. Poygina ◽  
Nataliya Petrova ◽  
N. Boldyreva
Keyword(s):  
Seismic Energy ◽  
Active Regions ◽  
Pacific Region ◽  
Strong Earthquakes ◽  
The Earth ◽  
The Pacific ◽  
Chinese Province ◽  
The Indian Ocean ◽  
Global Seismicity ◽  
Maximum Earthquake

The information on global seismicity in 2014 at the level of strong earthquakes with M≥6 according to the Seismological Bulletin of the Geophysical Survey of RAS (GS RAS) is provided. The original Seismological Bulletin for 2014 contains parameters of 3268 earthquakes in the world, versus 4212 in 2013. This article analyzes 165 earthquakes with M≥6, including 16 strongest earthquakes with M≥7, and five earthquakes with M6.0–6.7, which resulted in significant casualties and destruction. The information on focal mechanisms, macroseismic effect, the number of victims, tsunamis, etc. is given. A comparative analysis of the number of earthquakes and released seismic energy in different seismically active regions of the Earth showed that, as before, the Pacific region was the most seismically active. More than 96 % of common seismic energy was re-leased in the Pacific region, compared to 1.8 % in Eurasia, 1.3 % in Atlantic Ocean and 0.2 % in the Indian Ocean. The Earth’s maximum earthquake in 2014 occurred on April 1 with Mw=8.1 off shore of Chile. It was accompanied by numerous foreshocks and aftershocks. The maximum casualties and material damage in 2014 were caused by the catastrophic Ludian earthquake that occurred on August 3 with MS=6.2 in the Chinese province of Yunnan.

scholarly journals Seismic activity on the territory of Slovakia in 2018

2019 ◽  
Vol 49 (4) ◽  
pp. 511-523
Author(s):  
Róbert Kysel ◽  
Andrej Cipciar ◽  
Kristián Csicsay ◽  
Lucia Fojtíková ◽  
Martin šugár ◽  
...  
Keyword(s):  
Seismic Activity ◽  
Earth Science ◽  
Routine Data ◽  
Seismic Events ◽  
Seismic Stations ◽  
National Network ◽  
Macroseismic Observations ◽  
The Earth ◽  
Short Period ◽  
Academy Of Sciences

Abstract The National Network of Seismic Stations of Slovakia (NNSS) consists of eight short period and five broadband permanent seismic stations and a data centre located at the Earth Science Institute of the Slovak Academy of Sciences (ESI SAS). The NNSS recorded and detected 11704 seismic events from all epicentral distances in 2018. Totally 86 earthquakes originated in the territory of Slovakia in 2018. This paper provides basic information on the configuration of the NNSS, routine data processing, seismic activity on the territory of Slovakia in 2018 as well as macroseismic observations collected in 2018.

scholarly journals Carpathian Ecological Network: International Legal Basis and Ukrainian Experience

2018 ◽  
Vol 5 (2) ◽  
pp. 170-177
Author(s):  
Mariya Vashchyshyn
Keyword(s):  
Sustainable Development ◽  
Protected Areas ◽  
Environmental Protection ◽  
International Cooperation ◽  
Sustainable Management ◽  
Ecosystem Approach ◽  
Landscape Diversity ◽  
Ecological Network ◽  
The Carpathians ◽  
Carpathian Region

The article analyzes the importance of the Framework Convention on the Protection and Sustainable Development of the Carpathians of 2003 (Carpathian Convention). Carpathian Convention created favourable conditions for the conservation of landscapes and biological diversity of mountain ecosystems of the Carpathian region. Carpathian Convention is a framework instrument, in other words, it determines the general principles concerning the solution of environmental, social and economic problems of the region. The Protocol on Conservation and Sustainable Use of Biological and Landscape Diversity to the Framework Convention on the Protection and Sustainable Development of the Carpathians has been analyzed. The advantages of international cooperation of the countries of the Carpathian region in achieving a common comprehensive result – conservation of biodiversity and improvement of social and economic level of the region and its inhabitants on the grounds of sustainable development have been defined. Carpathian Convention coordinates the economic needs with the social and environmental protection, promotes the conservation of the unique and authentic cultural and natural heritage of the Carpathian ecoregion for present and future generations. Framework Convention on the Protection and Sustainable Development of the Carpathians provides the creation of the Carpathian ecological network as a type of ecological networks at the sub-regional level, which is a part of the Pan-European ecological network. Ukraine consistently follows the bilateral and multilateral agreements, concluded with neighboring countries, concerning the protection of the environment and is involved in the creation of cross-border elements of the national ecological network. The peculiarities of the Carpathian network of protected areas have been considered. The Carpathian network of protected areas is a special form of international cooperation in environmental protection, which consists in determining by the Conference of the Parties to the Carpathian Convention the list of protected areas and in approving of regulations about them. The Conference of the Parties to the Carpathian Convention encourages the administrations of these protected areas to participate actively in international cooperation and exchange of experience in the field of the conservation of the unique biological and landscape diversity, and to reduce the negative impact on the environment of the region of the Ukrainian Carpathians. The author proves that the Carpathian Convention, except the traditional approaches concerning the protection of separate areas and species, recognizes the necessity of a broader approach to the conservation of nature. Parties to the Carpathian Convention are obliged to improve the conservation and sustainable management on the areas that are outside of protected areas, with the help of the ecosystem approach. Such an ecosystem approach to the sustainable management is applied to the spatial planning, integrated water management, agriculture, forestry, transport, infrastructure, industry, energy, tourism and cultural heritage conservation. Herewith, the interests of environmental protection shall be taken into account during the development and implementation of the economic and social policies

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