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New Ground Motion Prediction Equation for Peak Ground Velocity and Duration of Ground Motion for Mining Tremors in Upper Silesia 上西里西亚矿震峰值地速度和地震动持续时间的新地震动预测方程
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-28 DOI: 10.1515/acgeo-2016-0109
Jacek Chodacki
{"title":"New Ground Motion Prediction Equation for Peak Ground Velocity and Duration of Ground Motion for Mining Tremors in Upper Silesia","authors":"Jacek Chodacki","doi":"10.1515/acgeo-2016-0109","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0109","url":null,"abstract":"This article presents a method of predicting the peak horizontal velocity of ground motion, PHV, and the duration of vibration, tH, for strong seismic events (E ≥ 5•106 J, ML > 2.5) in the Upper Silesian Coal Basin (USCB). For the prediction of PHV, a model proposed by Si and Midorikawa was used. The regression method takes into account the impact of the local geology under seismic stations on the ground motion according to the Eurocode 8 classification. The ground classification was based on the results of a seismic survey conducted near the seismometer stations. This method is of great practical use because it allows the degree of vibration intensity to be determined on the basis of the Mining Seismic Instrumental Intensity Scale MSIIS-15 (acronym GSIGZW in Polish version) at any distance from the epicentre of the seismic events induced or triggered by mining.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67092374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Changes in Drought Conditions in Poland over the Past 60 Years Evaluated by the Standardized Precipitation-Evapotranspiration Index 标准化降水-蒸散指数对波兰过去60年干旱条件变化的评价
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-28 DOI: 10.1515/acgeo-2016-0110
U. Somorowska
{"title":"Changes in Drought Conditions in Poland over the Past 60 Years Evaluated by the Standardized Precipitation-Evapotranspiration Index","authors":"U. Somorowska","doi":"10.1515/acgeo-2016-0110","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0110","url":null,"abstract":"This paper investigates the variability of drought conditions in Poland in the years 1956–2015 with the use of the Standardized Precipitation-Evapotranspiration Index (SPEI). The study provides a new insight into the phenomenon of the past expansion of the drought-affected area as well as evidence of drying trends in a spatiotemporal context. 3-month, 6-month, and 12-month SPEI were considered, representing drought conditions relevant to agriculture and hydrology. The analysis demonstrates that the spatial extent of droughts shows a broad variability. The annual mean of the percentage of the area under drought has witnessed an increase for all three SPEI timescales. This also pertains to the mean area affected by drought over the growing season (April–September). A decreasing trend in the SPEI values indicates an increase in the severity of droughts over the 60-year period in question in an area extending from the south-west to the central part of Poland.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0110","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67092778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 52
Comparison of Selected Geopotential Models in Terms of the GOCE Orbit Determination Using Simulated GPS Observations 利用模拟GPS观测确定GOCE轨道的几种位势模式的比较
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-28 DOI: 10.1515/acgeo-2016-0115
A. Bobojć
{"title":"Comparison of Selected Geopotential Models in Terms of the GOCE Orbit Determination Using Simulated GPS Observations","authors":"A. Bobojć","doi":"10.1515/acgeo-2016-0115","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0115","url":null,"abstract":"This work contains a comparative study of the performance of six geopotential models in an orbit estimation process of the satellite of the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission. For testing, such models as ULUX_CHAMP2013S, ITG-GRACE 2010S, EIGEN-51C, EIGEN5S, EGM2008, EGM96, were adopted. Different sets of pseudo-range simulations along reference GOCE satellite orbital arcs were obtained using real orbits of the Global Positioning System satellites. These sets were the basic observation data used in the adjustment. The centimeter-accuracy Precise Science Orbit (PSO) for the GOCE satellite provided by the European Space Agency (ESA) was adopted as the GOCE reference orbit. Comparing various variants of the orbital solutions, the relative accuracy of geopotential models in an orbital aspect is determined. Full geopotential models were used in the adjustment process. The solutions were also determined taking into account truncated geopotential models. In such case, an accuracy of the solutions was slightly enhanced. Different arc lengths were taken for the computation.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67092919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Interpretation of Gravity and Gamma-Ray Spectrometry Data in Low Temperature Hydrothermal Systems, Southeastern Part of Fukuoka, Japan 日本福冈东南部低温热液系统重力和伽马射线能谱数据解释
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-28 DOI: 10.1515/acgeo-2016-0113
J. Nishijima, Y. Fujimitsu
{"title":"Interpretation of Gravity and Gamma-Ray Spectrometry Data in Low Temperature Hydrothermal Systems, Southeastern Part of Fukuoka, Japan","authors":"J. Nishijima, Y. Fujimitsu","doi":"10.1515/acgeo-2016-0113","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0113","url":null,"abstract":"The Hakata hot springs area is located in Fukuoka City, which is in the southwestern part of Japan. Gamma-ray and gravity surveys were conducted to understand the relationship between the low-temperature hydrothermal systems and geophysical data of the area. The depth of the reservoir basement, which was derived from gravity data, gradually deepens toward the east; it includes some steep depth gradients in the Hakata hot springs area. High intensities of gamma-rays were detected around these gradients. In addition, higher hot spring temperatures and flow rates can be observed in this area. These results indicate that some part of the level of the basement where the hot springs are concentrated is a part of the Kego Fault and is similar to the fracture zone created by past activities of the fault. Moreover, these steep depth gradients act as a path for hot spring water from the deeper side of the granitic body to the surface.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0113","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67092551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution Characteristics of TOC, TN and TP in the Wetland Sediments of Longbao Lake in the San-Jiang Head Waters 三江源龙宝湖湿地沉积物TOC、TN和TP分布特征
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-28 DOI: 10.1515/acgeo-2016-0093
Sujin Lu, Jian-Huan Si, Y. Qi, Zhanqing Wang, Xiaocui Wu, Chuanying Hou
{"title":"Distribution Characteristics of TOC, TN and TP in the Wetland Sediments of Longbao Lake in the San-Jiang Head Waters","authors":"Sujin Lu, Jian-Huan Si, Y. Qi, Zhanqing Wang, Xiaocui Wu, Chuanying Hou","doi":"10.1515/acgeo-2016-0093","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0093","url":null,"abstract":"The study deals with the distribution of nutrients in wetland sediments, which provide the basis for revealing the wetland eutrophication processes and mechanisms of internal pollution sources. The total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP) contents and distribution characteristics of sediment samples were examined. The results showed that the TOC concentration ranged from 3.81 to 15.6 g/kg, the TN concentration ranged from 0.21 to 1.18 g/kg with a mean concentration of 0.66 g/kg, and the TP concentration ranged from 0.16 to 0.35 g/kg with a mean of 0.23 g/kg. Statistical analysis showed close correlations between TOC and TN (R2 = 0.96), and TN and TP (R2 = 0.97), which indicated that the TN and TP in the sediments were from similar sources. The concentrations of TOC, TN, and TP in Longbao Lake wetland sediments were too low for eutrophication to occur. Our investigation indicated that Longbao Lake undergoes natural evolution rather than anthropogenic activities.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0093","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67091600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Wavelet Characteristics of Hydrological and Dissolved Oxygen Time Series in a Lowland River 低地河流水文和溶解氧时间序列的小波特征
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0023
Agnieszka Rajwa-Kuligiewicz, R. Bialik, P. Rowiński
{"title":"Wavelet Characteristics of Hydrological and Dissolved Oxygen Time Series in a Lowland River","authors":"Agnieszka Rajwa-Kuligiewicz, R. Bialik, P. Rowiński","doi":"10.1515/acgeo-2016-0023","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0023","url":null,"abstract":"In this study, we investigated the temporal variability of dissolved oxygen and water temperature in conjunction with water level fluctuations and river discharge in the Narew lowland river reach. For this purpose, high resolution hydrologic and water quality time series have been used. Spectral analyses of time series using continuous wavelet transform scheme have been applied in order to identify characteristic scales, its duration, and localisation in time. The results of wavelet analysis have shown a great number of periodicities in time series at the inter-annual time scale when compared to the classical Fourier analysis. Additionally, wavelet coherence revealed the complex nature of the relationship between dissolved oxygen and hydrological variables dependent on the scale and localisation in time. Hence, the results presented in this paper may provide an alternative representation to a frequency analysis of time series.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67088117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Regional Variations of the ω-upper Bound Magnitude of GIII Distribution in the Iranian Plateau 伊朗高原GIII分布ω-上界幅度的区域变化
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0038
H. Mohammadi, Y. Bayrak
{"title":"Regional Variations of the ω-upper Bound Magnitude of GIII Distribution in the Iranian Plateau","authors":"H. Mohammadi, Y. Bayrak","doi":"10.1515/acgeo-2016-0038","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0038","url":null,"abstract":"The Iranian Plateau does not appear to be a single crustal block, but an assemblage of zones comprising the Alborz—Azerbaijan, Zagros, Kopeh—Dagh, Makran, and Central and East Iran. The Gumbel’s III asymptotic distribution method (GIII) and maximum magnitude expected by Kijko—Sellevoll method is applied in order to check the potentiality of the each seismogenic zone in the Iranian Plateau for the future occurrence of maximum magnitude (Mmax). For this purpose, a homogeneous and complete seismicity database of the instrumental period during 1900–2012 is used in 29 seismogenic zones of the examined region. The spatial mapping of hazard parameters (upper bound magnitude (ω), most probable earthquake magnitude in next 100 years (M100) and maximum magnitude expected by maximum magnitude estimated by Kijko—Sellevoll method (max MK − Smax) reveals that Central and East Iran, Alborz and Azerbaijan, Kopeh—Dagh and SE Zagros are a dangerous place for the next occurrence of a large earthquake.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67088937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long-term Geomechanical Observation in the Jeroným Mine Jeroným矿山长期地质力学观测
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0054
Z. Kaláb, M. Lednická
{"title":"Long-term Geomechanical Observation in the Jeroným Mine","authors":"Z. Kaláb, M. Lednická","doi":"10.1515/acgeo-2016-0054","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0054","url":null,"abstract":"Geomechanical measurements have been carried out in the medieval Jeroným Mine since 2001. At first quarterly observation and later also continual monitoring by distributed measurement network were used. The network includes a number of different sensors that have been installed in selected places of underground spaces. There have not been any manifestations documenting dangerous changes of stability during the period of monitoring (2001–2015). The results of accomplished measurements from all convergence profiles confirm the total stability of all underground spaces. However, a number of places have been documented as potentially unstable. Measured values of selected parameters are presented in the paper, namely, movements along fractures, changes of stress tensor and fluctuations in the level of mine water table.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67089879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Implementation of Elastic Prestack Reverse-Time Migration Using an Efficient Finite-Difference Scheme 利用有效的有限差分格式实现弹性叠前逆时偏移
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0078
Hongyong Yan, Lei Yang, H. Dai, Xiang-Yang Li
{"title":"Implementation of Elastic Prestack Reverse-Time Migration Using an Efficient Finite-Difference Scheme","authors":"Hongyong Yan, Lei Yang, H. Dai, Xiang-Yang Li","doi":"10.1515/acgeo-2016-0078","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0078","url":null,"abstract":"Elastic reverse-time migration (RTM) can reflect the underground elastic information more comprehensively than single-component Pwave migration. One of the most important requirements of elastic RTM is to solve wave equations. The imaging accuracy and efficiency of RTM depends heavily on the algorithms used for solving wave equations. In this paper, we propose an efficient staggered-grid finite-difference (SFD) scheme based on a sampling approximation method with adaptive variable difference operator lengths to implement elastic prestack RTM. Numerical dispersion analysis and wavefield extrapolation results show that the sampling approximation SFD scheme has greater accuracy than the conventional Taylor-series expansion SFD scheme. We also test the elastic RTM algorithm on theoretical models and a field data set, respectively. Experiments presented demonstrate that elastic RTM using the proposed SFD scheme can generate better images than that using the Taylor-series expansion SFD scheme, particularly for PS images. FurH. thermore, the application of adaptive variable difference operator lengths can effectively improve the computational efficiency of elastic RTM.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67091175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
High-Resolution Seismic Characterization of Shallow Gas Accumulations in the Southern Shelf of Marmara Sea, Turkey 土耳其马尔马拉海南陆架浅层天然气聚集的高分辨率地震特征
IF 2.3 4区 地球科学
Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2015-0059
D. Vardar, B. Alpar
{"title":"High-Resolution Seismic Characterization of Shallow Gas Accumulations in the Southern Shelf of Marmara Sea, Turkey","authors":"D. Vardar, B. Alpar","doi":"10.1515/acgeo-2015-0059","DOIUrl":"https://doi.org/10.1515/acgeo-2015-0059","url":null,"abstract":"High-resolution seismic survey was conducted to investigate acoustic characteristics of gassy sediments along the southern shelf of the Sea of Marmara. The acoustic turbidity zones outlined within the study area are generally below 2–9 m (2-10 ms TWT) the seafloor whilst this vertical distance varies between 9 and 21 m (10–25 ms TWT) for acoustic blanket type reflections. The gassy sediments cover an area of sea floor of about 45, 110, and 75 km2 in front of Gönen River, Kocasu River, and Gemlik Bay, respectively. The gassy sediments in the center of Gemlik Bay exhibited an elliptical geometry similar to its basin while the others have deltaic forms in front of the rivers. The sea bottom and near surface sedimentary units are made-up of organic-rich sediments, mostly transported by the southern rivers. The gas observed in sediments is thought to be of biogenic origin, which may be caused by degradation of organic matter in the sediment.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2015-0059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67086713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
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