Journal of Seismology最新文献

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Local seismicity type of Kuwait revealing tectonic and anthropogenic characteristics 揭示构造和人为特征的科威特地方地震类型
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-31 DOI: 10.1007/s10950-024-10222-7
Abd el-aziz Khairy Abd el-aal, Farah Al-Jeri, Abdullah Al-Enezi, Hamada Saadalla
{"title":"Local seismicity type of Kuwait revealing tectonic and anthropogenic characteristics","authors":"Abd el-aziz Khairy Abd el-aal,&nbsp;Farah Al-Jeri,&nbsp;Abdullah Al-Enezi,&nbsp;Hamada Saadalla","doi":"10.1007/s10950-024-10222-7","DOIUrl":"10.1007/s10950-024-10222-7","url":null,"abstract":"<div><p>This work investigates the characteristics of local seismicity within the State of Kuwait and discusses its potential tectonic and anthropogenic drivers. As Kuwait is an oil-producing country, the occurrence of earthquakes simultaneously with oil extraction may suggest a case of triggered or induced seismicity. Seismic activity inside Kuwait is monitored with high accuracy and continuously after the establishment of the Kuwait National Seismic Network (KNSN) in 1997 through an ambitious plan to study the micro-earthquake activity in Kuwait. This network recorded more than 1378 micro/minor local earthquakes. Two seismogenic areas are identified, both characterized by weak magnitudes and shallow focal depths. In the current work, several modern geophysical techniques are performed including earthquake location, waveform-based moment tensor inversion, moment tensor decomposition, stress drop analysis, and stress pattern assessment. The results suggest that local earthquakes in Kuwait involve tectonic and anthropogenic components. Further densification of the network may allow a robust discrimination in the future.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"635 - 655"},"PeriodicalIF":1.6,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195483","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
A comparative analysis of five commonly implemented declustering algorithms 五种常用去聚类算法的比较分析
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-28 DOI: 10.1007/s10950-024-10221-8
Mason Perry, Rebecca Bendick
{"title":"A comparative analysis of five commonly implemented declustering algorithms","authors":"Mason Perry,&nbsp;Rebecca Bendick","doi":"10.1007/s10950-024-10221-8","DOIUrl":"10.1007/s10950-024-10221-8","url":null,"abstract":"<div><p>Declustering of earthquake catalogs, that is determining dependent and independent events in an earthquake sequence, is a common feature of many seismological studies. While many different declustering algorithms exist, each has different performance and sensitivity characteristics. Here, we conduct a comparative analysis of the five most commonly used declustering algorithms: Garnder and Knopoff (1974), Uhrhammer (1986), Reasenberg (J Geophys Res: Solid Earth 90(B7):5479–5495, 1985), Zhuang et al. (J Am Stat Assoc 97(458):369–380, 2002), and Zaliapin et al. (Phys Rev Lett 101(1):4–7, 2008) in four different tectonic settings. Overall, we find that the Zaliapin et al. (Phys Rev Lett 101(1):4–7, 2008) algorithm effectively removes aftershock sequences, while simultaneously retaining the most information (i.e. the most events) in the output catalog and only slightly modifying statistical characteristics (i.e. the Gutenberg Richter b-value). Both Gardner and Knopoff (1974) and Zhuang et al. (J Am Stat Assoc 97(458):369–380, 2002) also effectively remove aftershock sequences, though they remove significantly more events than the other algorithms. Uhrhammer (1986) also effectively removes aftershock sequences and removes fewer events than Gardner and Knopoff (1974) or Zhuang et al. (J Am Stat Assoc 97(458):369–380, 2002), except when large magnitude events are present. By contrast, Reasenberg (J Geophys Res: Solid Earth 90(B7):5479–5495, 1985) only effectively removed aftershocks in one of the test regions.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"829 - 842"},"PeriodicalIF":1.6,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166001","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
Magnitude estimation and site characterization in southwestern British Columbia: application to earthquake early warning 不列颠哥伦比亚省西南部的震级估计和地点特征:应用于地震预警
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-23 DOI: 10.1007/s10950-024-10216-5
Alireza Babaie Mahani, Eli Ferguson, Benoit Pirenne
{"title":"Magnitude estimation and site characterization in southwestern British Columbia: application to earthquake early warning","authors":"Alireza Babaie Mahani,&nbsp;Eli Ferguson,&nbsp;Benoit Pirenne","doi":"10.1007/s10950-024-10216-5","DOIUrl":"10.1007/s10950-024-10216-5","url":null,"abstract":"<div><p>In this study, we took a close look at the Ocean Networks Canada’s earthquake early warning system in southwestern British Columbia through analysis of the magnitude estimates by this system and characterization of site conditions for both onshore and offshore stations. Using magnitude values estimated at each station, over hundreds of notifications, we provided station terms to correct the magnitudes for stations that systematically generate high or low magnitude values. Moreover, by compiling a rich ground motion amplitude dataset and applying the horizontal-to-vertical spectral ratio method from Fourier amplitude of acceleration and response spectral acceleration, we investigated site characterization through evaluation of non-linear site response behavior and estimation of the site dominant frequency (<i>f</i><sub><i>peak</i></sub>) and its peak amplitude (<i>A</i><sub><i>peak</i></sub>) for each station. In general, no strong evidence of non-linearity is observed at any stations considering the magnitude-distance distribution of ground motions in this study. Offshore sites show <i>f</i><sub><i>peak</i></sub> and <i>A</i><sub><i>peak</i></sub> in the range of approximately 1.7–6 Hz and 0.4–1.2 (in base-10 log unit), respectively, whereas onshore sites show approximately 1–6 Hz for <i>f</i><sub><i>peak</i></sub> and 0.3–0.7 (in base-10 log unit) for <i>A</i><sub><i>peak</i></sub>.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"735 - 751"},"PeriodicalIF":1.6,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10950-024-10216-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141104546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crustal thickness variation of Kalimantan and Sulawesi Region from Teleseismic receiver function 从远震接收函数看加里曼丹和苏拉威西地区的地壳厚度变化
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-22 DOI: 10.1007/s10950-024-10220-9
Nova Heryandoko, Andri Dian Nugraha, Zulfakriza Zulfakriza, Shindy Rosalia, Tedi Yudistira, Supriyanto Rohadi, Daryono Daryono, Sri Widiyantoro
{"title":"Crustal thickness variation of Kalimantan and Sulawesi Region from Teleseismic receiver function","authors":"Nova Heryandoko,&nbsp;Andri Dian Nugraha,&nbsp;Zulfakriza Zulfakriza,&nbsp;Shindy Rosalia,&nbsp;Tedi Yudistira,&nbsp;Supriyanto Rohadi,&nbsp;Daryono Daryono,&nbsp;Sri Widiyantoro","doi":"10.1007/s10950-024-10220-9","DOIUrl":"10.1007/s10950-024-10220-9","url":null,"abstract":"<div><p>Kalimantan and Sulawesi are located within the complex tectonic setting of central Indonesia. The tectonic evolution process during the Mesozoic and Cenozoic led to the formation of this region. Studies of Moho depth variation beneath this region are still limited due to the lack of local to regional scale seismic stations covering the entire Kalimantan and Sulawesi region. The availability of seismic data has doubled and tripled recently, here, we conduct receiver function study using reliable dense seismic data from BMKG seismic network (IA) to obtain more detail Moho depth variation in Kalimatan and Sulawesi. We analyzed P–waveforms recorded at 60 seismic stations of BMKG seismic network (IA) distributed in Kalimantan and Sulawesi from more than 150 earthquakes with M ≥ 6 distributed within the epicentral distance range of 30<sup>o</sup> – 90<sup>o</sup>. The receiver function signals of each seismic station were computed using the iterative time-domain deconvolution method, then the Moho depths and bulk composition (Vp/Vs ratio) were computed using the modified <i>H</i>-<i>κ</i> stacking method which consider the sediment thickness. Our results show that the crustal thickness in Kalimantan varies from ~25 to ~37 km and Vp/Vs ratio varies from ~1.61 to ~1.96, which reflect a characteristic of stable Mesozoic-Cenozoic regions, while Sulawesi is observed within broad thickness range of ~22 – 50 km and Vp/Vs ratio of ~1.56 – 1.97. The extremely thick crust in Sulawesi reflects the rapid uplift and exhumation zones achieved by tectonic process sequences that had been occurred in this region.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"879 - 898"},"PeriodicalIF":1.6,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141112277","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
Evaluation of seismicity and seismotectonics in the Alborz Mountains: insights from seismic parameters, Northern Iran 对伊朗北部阿尔伯兹山脉地震活动性和地震构造的评估:从地震参数中获得的启示
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-17 DOI: 10.1007/s10950-024-10218-3
Marjan Tourani, Veysel Isik, Reza Saber, Ayse Caglayan, Florina Chitea
{"title":"Evaluation of seismicity and seismotectonics in the Alborz Mountains: insights from seismic parameters, Northern Iran","authors":"Marjan Tourani,&nbsp;Veysel Isik,&nbsp;Reza Saber,&nbsp;Ayse Caglayan,&nbsp;Florina Chitea","doi":"10.1007/s10950-024-10218-3","DOIUrl":"10.1007/s10950-024-10218-3","url":null,"abstract":"<div><p>The Alborz Mountains are among the areas exhibiting high tectonic and seismic activity in northern Iran. Studying key parameters of tectonic structures, including quantitative analysis and observational studies, in such active regions is essential to identify potential active faults and assess the consequent seismic hazards. This study focuses on seismicity and seismotectonics by analyzing seismic parameters, including <i>b</i>-value, mean seismic activity rate, earthquake recurrence time, seismic moment, and fractal dimension derived from micro and teleseismic data. The <i>b</i>-values vary between 0.6 and 1.1 in the tectonically active parts of the study area, corresponding with the reverse/thrust and strike-slip active faults. Large earthquakes might be prone to occur at 10–25 km depth because both catalogues show low <i>b</i>-values (<i>b</i> &lt; 1.0) concentrations at this depth range. The high fractal dimension (&gt; 1.5), high seismic activity rate, large seismic moment parameters, and its continuously increasing trend. Short recurrence periods (20–50 years) of <i>M</i> 6.5 events also emphasize the high seismic activity and high seismic hazard. On the other hand, the prevalence of low <i>b</i>-values is notably observed in areas encompassing densely populated cities such as Rasht, Lahijan, Amol, Babol, Sari, Behshahr, Gorgan, and the megacity of Tehran. Furthermore, we have identified asperities where the Gorgan Plain, the Khazar, and the Alamutrud Fault Zones are located. These findings emphasize the seismic hazard potential in the identified areas and urban centers within the study area. Therefore, particular attention should be directed towards areas exhibiting low <i>b</i>-values when assessing and mitigating seismic hazards. It underscores the necessity for additional focus on seismic hazard assessment and implementation of mitigation strategies in the Alborz region.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"675 - 706"},"PeriodicalIF":1.6,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063557","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
Fault Source of Seismicity in Al-Refaei District, Southern Iraq 伊拉克南部 Al-Refaei 地区的断层震源
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-05-02 DOI: 10.1007/s10950-024-10217-4
Ali Ramthan, Wathiq Abdulnaby, Najah Abd, Hanan Mahdi, Haydar Al-Shukri
{"title":"Fault Source of Seismicity in Al-Refaei District, Southern Iraq","authors":"Ali Ramthan,&nbsp;Wathiq Abdulnaby,&nbsp;Najah Abd,&nbsp;Hanan Mahdi,&nbsp;Haydar Al-Shukri","doi":"10.1007/s10950-024-10217-4","DOIUrl":"10.1007/s10950-024-10217-4","url":null,"abstract":"<div><p>Over the past two decades, the Al-Refaei district, a substantial town located in the Thi-Qar governorate in southern Iraq, has been subjected to numerous small to moderate-size earthquakes. A network of seven short-period seismic stations was installed in the Al-Refaei district to monitor seismic activity, a project that was initiated in 2014 and continued until 2018. The short-period seismic stations supplement the broadband seismic stations of the Mesopotamian Seismological Network (MPSN), which also serves this area. During the monitoring period, more than 56 earthquakes were recorded, of which 31 were detected by the short-period seismic stations and not reported by any other local or international seismic observatories. Data from the short-period and broadband seismic stations were analyzed using Geiger’s least-squares method to determine accurate locations. The relocated earthquakes delineate a possible fault source with a northwest-southeast trend. The possible fault is not related to any known or previously studied fault. 3D seismic data of the area were evaluated and further supported the interpretation of a northwest-southeast trending fault, named the Al-Refaei fault. Integration of the seismological and 3D seismic data suggests that the Al-Refaei fault is a reverse fault with a S62˚E strike direction and a 43˚ dip angle. The strike and dip of the Al-Refaei fault were calculated from the analysis of the 3D seismic data. The reverse style of faulting was derived from the composite first motion method using the seismic station records of the short-period network.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"657 - 674"},"PeriodicalIF":1.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883219","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
Intensity Prediction Equations for Himalaya and its sub-regions based on data from traditional sources and USGS’s Did You Feel It? (DYFI) 根据传统来源和美国地质调查局的 "你感觉到了吗?
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-04-27 DOI: 10.1007/s10950-024-10214-7
P. Anbazhagan, Harish Thakur
{"title":"Intensity Prediction Equations for Himalaya and its sub-regions based on data from traditional sources and USGS’s Did You Feel It? (DYFI)","authors":"P. Anbazhagan,&nbsp;Harish Thakur","doi":"10.1007/s10950-024-10214-7","DOIUrl":"10.1007/s10950-024-10214-7","url":null,"abstract":"<div><p>This study has developed Intensity Prediction Equations (IPEs) for the Himalayas and its sub-regions (divided into North-West Himalaya, Central Himalaya, and North-East Himalaya). For this purpose, intensity data reported in previous studies using traditional methods (like field surveys, media reports, and newspapers) and internet-based questionnaires (such as USGS’s Did You Feel It? or DYFI) were used to catalogue two separate intensity datasets. Intensities of traditional datasets were also reassessed for some earthquake events by different studies in the different scales of assignment, which was homogenized for the same intensity scale. IPEs are derived for both datasets separately using a two-stage and one-stage regression technique. These IPEs are developed for a first- and second-order relation with respect to earthquake magnitude. A “maximum intensity vs. magnitude approximation of the IPE” approach relying on an optimal hypocentral depth has also been proposed to select the best-suited IPEs. The information-theoretic approach-based Log-likelihood method (Scherbaum et al. 2009) has been used to check and compare developed IPE performance for events not used for IPE development. These newly developed equations can be used to assess the damage potential of future earthquakes.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"707 - 734"},"PeriodicalIF":1.6,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140804929","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
Empirical Green’s function analysis of some induced earthquake pairs from the Groningen gas field 格罗宁根气田一些诱发地震对的经验格林函数分析
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-04-15 DOI: 10.1007/s10950-024-10204-9
Steve Oates, Jelena Schmitz, Brian Zurek, Thomas Piesold, Ewoud van Dedem
{"title":"Empirical Green’s function analysis of some induced earthquake pairs from the Groningen gas field","authors":"Steve Oates,&nbsp;Jelena Schmitz,&nbsp;Brian Zurek,&nbsp;Thomas Piesold,&nbsp;Ewoud van Dedem","doi":"10.1007/s10950-024-10204-9","DOIUrl":"10.1007/s10950-024-10204-9","url":null,"abstract":"<div><p>We have applied the empirical Green’s function (EGF) method to 53 pairs of earthquakes, with magnitudes ranging from <i>M</i> = 0.4 to <i>M</i> = 3.4, induced by gas production from the Groningen field in the Netherlands. For a subset of the events processed, we find that the relative source time functions obtained by the EGF deconvolution show clear indications of a horizontal component of rupture propagation. The earthquake monitoring network used has dense azimuthal coverage for nearly all events such that wavelet duration times can be picked as a function of source-station azimuth and inverted using the usual Doppler broadening model to estimate rupture propagation strike, distance, and velocity. Average slip velocities have also been estimated and found to be in agreement with typical published values. We have used synthetic data, from both a simple convolutional model of the seismogram and more sophisticated finite difference rupture simulations, to validate our data processing workflow and develop kinematic models which can explain the observed characteristics of the field data. Using a measure based on the L1-norm to discriminate results of differing quality, we find that the highest quality results show very good alignment of the rupture propagation with directions of the detailed fault map, obtained from the full-field 3D seismic data. The dip direction rupture extents were estimated from the horizontal rupture propagation distances and catalogue magnitudes showing that, for all but the largest magnitude event (the <i>M</i> = 3.4 event of 8th January 2018), the dip-direction extent is sufficiently small to be contained wholly within the reservoir.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"579 - 613"},"PeriodicalIF":1.6,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10950-024-10204-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140584915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: The 2022–2023 seismic sequence onshore South Evia, central Greece: evidence for activation of a left-lateral strike-slip fault and regional triggering of seismicity 更正:希腊中部南埃维亚海岸 2022-2023 年地震序列:左侧走向滑动断层激活和区域触发地震的证据
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-04-12 DOI: 10.1007/s10950-024-10215-6
Anna Serpetsidaki, Athanassios Ganas
{"title":"Correction: The 2022–2023 seismic sequence onshore South Evia, central Greece: evidence for activation of a left-lateral strike-slip fault and regional triggering of seismicity","authors":"Anna Serpetsidaki,&nbsp;Athanassios Ganas","doi":"10.1007/s10950-024-10215-6","DOIUrl":"10.1007/s10950-024-10215-6","url":null,"abstract":"","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 2","pages":"279 - 279"},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10950-024-10215-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hypocenter uncertainty analysis of induced and tectonic earthquakes in the Netherlands 荷兰诱发地震和构造地震的震中不确定性分析
IF 1.6 4区 地球科学
Journal of Seismology Pub Date : 2024-04-10 DOI: 10.1007/s10950-024-10205-8
Jesper Spetzler, Elmer Ruigrok, Dagmar Bouwman
{"title":"Hypocenter uncertainty analysis of induced and tectonic earthquakes in the Netherlands","authors":"Jesper Spetzler,&nbsp;Elmer Ruigrok,&nbsp;Dagmar Bouwman","doi":"10.1007/s10950-024-10205-8","DOIUrl":"10.1007/s10950-024-10205-8","url":null,"abstract":"<div><p>Induced earthquakes tend to be shallow, while tectonic events often occur in deeper parts of the Earth. A well-estimated hypocenter with uncertainties may help to evaluate whether an event is of an induced or tectonic origin. In this study, we focus on the development of a hypocenter method that helps to better define the source location of an earthquake and reduce the spatial error of the measurement. The hypocenter and the uncertainty is obtained by using the P- and S-wave phase time difference for a station and the P-wave traveltime differences between pairs of stations simultaneously in the hypocenter analysis. The uncertainty inherent to an imperfect reference velocity model, modelling, instrumental inaccuracy and phase time picking is propagated into the spacial hypocenter solution. A refined hypocenter methodology is successfully tested in a synthetic experiment with shallow (<span>(sim )</span> 5 km), intermediate (<span>(sim )</span> 10 km) and deep source points (<span>(sim )</span> 15 km). The synthetic experiment indeed shows that it is possible to separate earthquakes by their depth solution, hence offering an indication that the event is either induced or tectonic. Case studies are presented of estimations of hypocenters and error ellipses for (1) induced seismicity at sites for gas storage in salt domes, geothermal production and gas extraction as well as (2) tectonic events.</p></div>","PeriodicalId":16994,"journal":{"name":"Journal of Seismology","volume":"28 3","pages":"555 - 577"},"PeriodicalIF":1.6,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140584986","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
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