Journal of Volcanology and Seismology最新文献

{"title":"The Relation between Magnitudes MLH and MW for the Kuril–Okhotsk Region and the Use of the Relation for Conversions to Other Magnitudes","authors":"D. A. Safonov","doi":"10.1134/S0742046325700071","DOIUrl":"10.1134/S0742046325700071","url":null,"abstract":"<p>With the purpose of unifying the earthquake catalog for the Kuril–Okhotsk region we derived a two-segment linear relation between the magnitude based on the surface wave <i>MLH</i> as reported by the Sakhalin Branch of the GS RAS and the moment magnitude <i>M</i>_W as reported by the GCMT and NIED. Comparison to analogous relations based on other catalogs shows that for large (<i>MLH</i> = 6.5–8.1) earthquakes there is a small (∼0.1) excess of regional magnitude <i>MLH</i> over the <i>M</i>_S in other catalogs. <i>MLH</i> exceeds the values of <i>M</i>_S by 0.2–0.4 in the interval <i>MLH</i> = 4.0–6.5. We have obtained relations connecting <i>MLH</i> and <i>M</i>_L as reported by the Kamchatka Branch of the GS RAS in the area of the Middle-Northern Kuril Islands, and <i>MLH</i> and <i>M</i>_j of the JMA for the southern part of the region. Conversion using the relation <i>MLH</i>(<i>M</i>_W) has repeated with good accuracy the relations derived directly. The best result is achieved when the differences between the determinations of <i>M</i>_W as reported by different agencies have been taken into account.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"127 - 142"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169513","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}

{"title":"On the Occurrence of Typical Precursory Anomalies in the Foreshock Areas of Some Large Earthquakes, Kuril–Kamchatka Region","authors":"M. V. Rodkin,&nbsp;M. Yu. Andreeva","doi":"10.1134/S0742046325700046","DOIUrl":"10.1134/S0742046325700046","url":null,"abstract":"<p>This paper discusses the potential of a new algorithm for earthquake prediction based on a set of precursory anomalies that have been previously identified reliably by construction and analysis of the generalized vicinity of a large earthquake. The differences between physical mechanisms generating earthquakes at different depths have been taken into account. We use data from the regional catalog for Kamchatka and the North Kuril Islands compiled by the KB FRC UGS RAS to discuss the question of how frequently such typical average anomalies are statistically reliably identified in the foreshock areas of individual large earthquakes. For this catalog at least one typical anomaly has been identified in the third of all cases where target <i>М</i>6.5+ earthquakes are concerned. The likelihood of successful retrospective prediction is critically dependent on the number of events recorded in the foreshock area of the large earthquake in question. The increase in the fraction of retrospectively predicted earthquakes with increasing number of events in the foreshock area of a large earthquake is supported by an analysis of data from worldwide ISC-GEM and GCMT catalogs and the double Turkish earthquakes of 2023. Options are suggested to further develop this prediction method, and attention is drawn to the problem of false alarms.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"163 - 171"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168259","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}

{"title":"The Occurrence of Precursors before Large (MW ≥ 6.6) Kamchatka Earthquakes","authors":"G. N. Kopylova,&nbsp;Yu. K. Serafimova,&nbsp;V. A. Kasimova","doi":"10.1134/S0742046325700034","DOIUrl":"10.1134/S0742046325700034","url":null,"abstract":"<p>A review is presented summarizing the work done in the search for earthquake precursors in Kamchatka compared with the leading elements of seismicity in the territory during the period of detailed seismic observation, 1962–2022, namely, the cumulative plot of seismic energy release and the large earthquakes that have occurred in the region. One peculiarity of the observing network consists in the location of most “nonseismological” types of precursor observation in the restricted area of the Petropavlovsk-Kamchatsky Test Site (PKTS). An analysis of 14 types of seismic, geophysical, and geochemical precursors preceding seven shallow and medium-depth earthquakes of 2005–2022 with <i>М</i>_W = 6.6–7.7 showed the growth of the number of precursors <i>N</i> with increasing parameter <i>M</i>_W/log <i>d</i>_h (<i>d</i>_h is hypocentral distance to the PKTS center in km), which characterizes the relative intensity of earthquake precursory processes in the PKTS area. This relationship between <i>N</i> and <i>M</i>_W/log <i>d</i>_h can be seen for interplate (subduction) earthquakes in the Kamchatka segment of the Kuril–Kamchatka island arc, is consistent with the occurrence of precursors in 1987–2004, and reflects the property of their simultaneous occurrence before earthquakes that are the largest and near to the PKTS. The effect of simultaneous occurrence of precursors (ESOP) before such earthquakes was observed in at least 80% of precursors of all those considered in this study. For such earthquakes, the ratio between hypocentral distance <i>d</i>_h and rupture length <i>L</i> (km) is <i>d</i>_h/<i>L</i> = 3.8–1.6; that is, the occurrence of ESOP is characteristic for the near and intermediate zones of the future earthquake rupture zone. Four separate kinds of precursor were examined to show that their threshold values <i>d</i>_h/L for the <i>М</i>_W ≥ 6.6 events are 5.0–8.5. If ESOP has been detected during seismic prediction work in real time, then one can use the threshold value found for it <i>d</i>_h/<i>L</i> ≤ 3.8 to considerably diminish the estimate of the distance between the future large earthquake and the PKTS and the Petropavlovsk–Elizovo urban agglomeration compared with the approach in which data on separate kinds of precursor are used.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"172 - 195"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168204","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}

{"title":"Enlightenment of the Recent Explosive Eruption of Hunga Tonga Hunga Ha’apai in Tonga","authors":"Minjie Guo,&nbsp;Chunjie Wang,&nbsp;Jie Bai,&nbsp;Yu Gao,&nbsp;Huan Zhang,&nbsp;Rui Hou,&nbsp;Qibin Wang,&nbsp;Wenqiang Zhang,&nbsp;Zhengyu Jin,&nbsp;Haimei Huang","doi":"10.1134/S0742046325700010","DOIUrl":"10.1134/S0742046325700010","url":null,"abstract":"<p>Eruptions of Hunga Tonga Hunga Ha’apai render a unique opportunity to explore the mechanism, environmental and climatic effects. Although the size of blast occurred on 15 January was large, the ashes emitted were small, and the global surface air temperature is likely to decrease by about 0.03–0.13°C in the next few years. The dominant reason for this disproportionateness is that vast majority of SO₂ and particles were removed before escaping out of the shallow water and soaring up into the upper atmosphere (∼30 km). The explosive eruptions had devastated this Pacific Island nation, and all things in the Tongatapu Island were covered by up to 2 cm thick ash layer. One puzzling phenomenon is that a sequence of low-frequency waves rippled globally in the atmosphere probably due to the continuous oscillations of gas bubbles shells at the magma-air interface. Furthermore, the atmospheric waves had regenerated the sea waves far-away from the volcano and exerted certain influence on ocean circulation and marine ecology, and thus the short-term explosive eruption may play far-reaching impacts. Given the series problems Tonga had faced after the blast, one realistic suggestion is that adequate preparations should be made in the emergency security and post-disaster reconstruction.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"203 - 214"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168206","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}

{"title":"The Assessment of Tsunami Hazard for the Coast of the Korf Bay, Bering Sea: Numerical Simulation","authors":"V. K. Gusiakov,&nbsp;S. A. Beisel,&nbsp;O. I. Gusev,&nbsp;A. V. Lander,&nbsp;D. V. Chebrov,&nbsp;L. B. Chubarov","doi":"10.1134/S0742046325700095","DOIUrl":"10.1134/S0742046325700095","url":null,"abstract":"<p>This paper discusses the results of solving the problem of tsunami hazard assessment for the northeastern coast of Kamchatka around the village of Korf which is situated on a sand spit in the northwestern part of the eponymous bay. This assessment was based on the “worst case” procedure. The seismicity and historical data on tsunami occurrences in the western Bering Sea were examined to identify three tsunami-generating zones: the near zone (the Bering Sea part), the regional zone (the Aleutian part), and the far (Chilean) zone as posing the greatest tsunami hazard for this stretch of the northeastern coast of Kamchatka. An analysis of seismicity and tectonics of the source zones yielded sets of modeled tsunami-generating earthquakes that are typical of each. For these sets we performed numerical modeling of tsunami generation and propagation which has identified the most dangerous model sources. The sea level rises due to these sources for the Korf area were 1.3 m for earthquakes from the near (Bering Sea) zone, 2.4 m for the regional (Aleutian) zone, and 2.5 m for the far (Chilean) zone. The next step consisted in more accurate calculations for such earthquakes in sequences of nested calculation grids, yielding characteristics of tsunami effects on the shore. The main results of this study consist in identification of tsunami-generating zones that are the most dangerous for the Korf Spit, selection of the model earthquakes for these, and estimation of extreme tsunami wave heights posing hazard for this coast segment.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 3","pages":"281 - 302"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169515","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}

{"title":"A Method for Processing and Analysis of Aftershocks Due to a Tectonic Earthquake: A New Look at an Old Problem","authors":"A. V. Guglielmi,&nbsp;A. D. Zavyalov,&nbsp;O. D. Zotov,&nbsp;B. I. Klain","doi":"10.1134/S0742046325700022","DOIUrl":"10.1134/S0742046325700022","url":null,"abstract":"<p>This paper is devoted to the 130th anniversary of the discovery of the Omori law. This first law in earthquake physics was formulated in 1894, and has become widely known since that time as the Omori law. It was found that the frequency of aftershocks following an earthquake decays approximately obeying the hyperbolic law on average. This was an epoch-making discovery. It has governed the line of research in the study of aftershocks for many decades ahead. Attention is mainly focused in the present paper on one of the modern lines of research in the phenomenological theory of aftershocks. A new method has been developed within the framework of that theory for aftershock data processing and analysis. The theory is based on the differential equation governing the evolution of an earthquake source after the main rupture has been formed in rocks in that zone. The differential approach, unlike Omori’s algebraic approach, allows one to get a new insight into the experimental study, processing, and analysis of aftershock data. Proceeding as outlined above, we have discovered the existence of the so-called Omori epoch, which terminates by bifurcation. The basic simple nonlinear evolution equation whose solution is identical with the Omori law suggests natural extensions of the phenomenological theory. In particular, one such extension which has the form of the Kolmogorov–Petrovsky–Piskunov equation enables a hypothetical relationship to be developed connecting the propagation of aftershock activity to Umov’s energy flux at the source.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"196 - 202"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168205","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}

{"title":"An Analysis of Variations in the Signal of an Aerosol LIDAR as a Possible Indicator of Local Seismic Activity","authors":"A. V. Myasnikov,&nbsp;A. L. Sobisevich,&nbsp;S. M. Pershin,&nbsp;M. Ya. Grishin,&nbsp;V. N. Lednev,&nbsp;V. A. Zavozin","doi":"10.1134/S0742046325700058","DOIUrl":"10.1134/S0742046325700058","url":null,"abstract":"<p>Cross-spectral analysis was applied to the results of a nearly one-year LIDAR monitoring of aerosol emanation from the Earth’s crust in the tunnel of the Baksan Neutrino Observatory at the Institute of Nuclear Research, Russian Academy of Sciences (BNO). It was found that ∼40% of LIDAR signal energy is controlled by the variation of meteorological factors, namely, air pressure (the effect of “barometric pumping“) and humidity. The important fact is that the signal modulation involves components in the crustal deformation due to lunisolar tidal waves М2 and О1. We provide a statistical justification for the potential of LIDAR as a new tool in the monitoring of local seismic activity based on crustal aerosol variations.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 2","pages":"155 - 162"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169511","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}

{"title":"The MW 7.0 Shipunsky Earthquake of August 17, 2024 off the East Coast of Kamchatka","authors":"D. V. Chebrov,&nbsp;E. A. Matveenko,&nbsp;I. R. Abubakirov,&nbsp;S. Ya. Droznina,&nbsp;A. V. Lander,&nbsp;S. V. Mityushkina,&nbsp;V. M. Pavlov,&nbsp;A. A. Raevskaya,&nbsp;V. A. Saltykov,&nbsp;S. L. Senyukov,&nbsp;N. N. Titkov","doi":"10.1134/S0742046325700101","DOIUrl":"10.1134/S0742046325700101","url":null,"abstract":"<p>This paper presents instrumental parameters and macroseismic data for the Shipunsky earthquake of August 17, 2024, <i>ML =</i> 7.0<i>, M</i>_W <i>=</i> 7.0<i>.</i> We discuss its tectonic setting and the aftershock process based on the first month of observation after the main event. The mechanisms and parameters for the Shipunsky earthquake and its largest aftershocks presented here were derived by an original procedure to calculate seismic moment tensors developed at the KB GS RAS. The directions of rupture and the orientations of rupture planes for these events enable us to relate their generation to the subduction of the Pacific plate under the Okhotsk plate on which Kamchatka lies. The Shipunsky earthquake has not caused loss of human lives and damage to buildings. Its maximum macroseismic effect was observed in the Shipunsky Peninsula, which was shaking of intensity 6 on the SIS-17 scale (GOST P 57546–2017); the intensity of shaking in the town of Petropavlovsk-Kamchatsky was 5–6. No tsunami alert has been issued, and no tsunami has been recorded.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 3","pages":"271 - 280"},"PeriodicalIF":0.9,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169516","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}

{"title":"Porphyry Ore-Magmatic Labaznoe System (the Omolonsky Cratonic Terrane, Northeast Russia): Age, Mineralogy of Mineralization and Mineral Thermobarometry of Ore-Bearing Granitoids in the Viktorinsky Complex","authors":"V. Yu. Soloviev,&nbsp;V. V. Priymenko,&nbsp;G. O. Polzunenkov,&nbsp;M. I. Fomina,&nbsp;T. I. Mikhalitsyna,&nbsp;A. M. Gagieva,&nbsp;V. B. Khubanov,&nbsp;P. P. Kolegov,&nbsp;V. V. Akinin","doi":"10.1134/S074204632470088X","DOIUrl":"10.1134/S074204632470088X","url":null,"abstract":"<p>This paper provides new data on the age (U–Pb, LA-SF-ICP-MS: 86 ± 1 Ma) of quartz monzodiorites of the Viktorisky complex in the Konginsky igneous zone of the Omolonsky cratonic terrane. The Labaznoe ore occurrence, which contains streaky-stockwork sulfide–quartz and vein polymetal mineralization, is localized within an intrusive dome uplift in whose central part a monzodiorite stock of the Viktorinsky complex is exposed. Petrographic and geochemical characteristics and mineral thermobarometry of the ore-bearing quartz monzodiorites are provided. Ore mineralogy is gien along with an estimate of the isotopic age (K–Ar: 82 ± 4 Ma) for the crystallization of sericite from a circumvein contact with the monzodiorite intrusion. Geological interrelationships and isotopic geochronologic data are used to find a paragenetic relation between the porphyry molybdenum mineralization and the phase of Late Cretaceous magmatism, viz, emplacement of Viktorinsky granitoid bodies. The phases have been reconstructed involving the formation of paragenetic mineral associations in the sequence magnetite–quartz, molybdenite–quartz, and sulfide–quartz; the hypogene phase terminates in a polymetallic phase. The materials of isotope dating of the ores and of ore-bearing granitoids in the area of study provide evidence of a Late Cretaceous (Coniacian‒Campanian) age of the porphyry igneous ore system in the Konginsky igneous zone.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"48 - 66"},"PeriodicalIF":0.7,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830759","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}

{"title":"The Explosive Activity of Zavaritsky Volcano (Simushir, Kuril Islands) during Holocene Time","authors":"O. V. Dirksen,&nbsp;V. V. Ponomareva,&nbsp;E. A. Zelenin,&nbsp;P. Yu. Plechov,&nbsp;T. M. Filosofova,&nbsp;A. V. Rybin","doi":"10.1134/S074204632470091X","DOIUrl":"10.1134/S074204632470091X","url":null,"abstract":"<p>The present paper reports first data on the Holocene explosive activity of Zavaritsky Volcano—a major caldera center on Simushir Island, Central Kurils. We have managed, for the first time ever, to reconstruct the chronology of explosive eruptions in this volcanic center for the last 10 thousand years, as well as to estimate the parameters of its larger eruptions. Overall, more than 40 tephra layers have been identified in pyroclastic soil sections, enabling us to estimate the frequency of eruptions, one event per every 250 years. The age model based on radiocarbon dates that we determined for proximal deposits and on published data for the tephra of Zavaritsky Volcano and for the CKr key tephra layer have enabled us to find the ages of most eruptions. It was found that the volcanic glasses of the Holocene pyroclastics have compositions corresponding to low-K basaltic andesites and rhyolites; the very low concentration of K₂O is a reliable indicator to distinguish the Zavaritsky tephra, not only from that of adjacent medium-K volcanoes, but also from the tephra of the other low-K volcanoes in the Kuril–Kamchatka island arc. The Holocene activity of Zavaritsky Volcano began with two major eruptions whose conservative magnitude estimates (<i>М</i>) were 6.4 and 5.6. These events occurred about 9.5 ka and 9.2 ka ago. The tephra of the earlier eruption (ZV-1) propagated northeast, and was found as far as the northwestern North America. The tephra of the second large eruption (ZV-3) has traveled north, and was found in sediments of the Sea of Okhotsk. The ZV-1 pyroclastics is characterized by volcanic glass of rhyolitic composition with the highest concentration of SiO₂ (72.5–74.0 wt %). The glasses in the ZV-3 eruption products varied between dacites and rhyodacites (65.0–71.9 wt % SiO₂). The products of later eruptions were cinders with glasses of the dacite–andesite and basaltic andesite compositions. Dacite glasses appeared again only in the tephra of the latest large explosive eruption which occurred a short time before the mid-19th century. Our study has revealed a catastrophic character of the Early Holocene explosive eruptions of Zavaritsky Volcano and its practically constant activity throughout the Holocene. The fact that the tephra of the last large eruption of this volcano (ZV-40) contained high silica glasses tells us that a large eruption is likely to occur in the near future.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"1 - 12"},"PeriodicalIF":0.7,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830783","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}