Journal of Volcanology and Seismology最新文献

The Present State and Evolution of the Near-Summit Hydrothermal Activity on Ebeko Volcano from 1951 through 2024 (Paramushir Island, Kuril Islands) 千岛群岛Paramushir岛Ebeko火山1951 - 2024年近峰顶热液活动现状及演化

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S0742046325700253

E. G. Kalacheva, T. A. Kotenko

{"title":"The Present State and Evolution of the Near-Summit Hydrothermal Activity on Ebeko Volcano from 1951 through 2024 (Paramushir Island, Kuril Islands)","authors":"E. G. Kalacheva, T. A. Kotenko","doi":"10.1134/S0742046325700253","DOIUrl":"10.1134/S0742046325700253","url":null,"abstract":"This paper is concerned with the present state of the thermal fields in the near-summit part of the active Ebeko Volcano on Paramushir Island (Kuril Islands). We show the area of occurrence, the discharge, and the chemical composition of the main types of water manifestations (pots, lake, springs). All thermal occurrences on the volcano resulted from interaction between volcanic gases on the one hand and the surface and underground waters circulating at small depths on the other; the thermal occurrences have low pH (<3), Cl–SO4 (SO4–Cl) composition in a wide range of temperatures (between 10 and 98°C) and salinity (between 1 and 100 g/L). Based on continuous multiyear observations of the evolution of chemical composition in thermal waters we estimated the response of volcanic events to the state of the hydrothermal system. We showed that changes in the chemical composition of Lake Goryachee are related to changes in the intensity (going as far complete decay) of hydrothermal activity in the Middle Crater. The phreatomagmatic eruption beginning in 2016 might have provoked the resumption of deep fluid flow into the lake, resulting in increased concentrations of Cl– in the water. The pots in the Northeastern Field are the most sensitive to events occurring on the volcano. All periods of increased activity are recorded in the varying concentrations of ({text{SO}}_{4}^{{2 - }}) and Cl– and in the relationships between the two after the increase in activity began. However, even the largest pots periodically become steam–gas jets, which impedes regular geochemical monitoring.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 5","pages":"451 - 469"},"PeriodicalIF":0.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227920","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

The Structure and Origin of the South Kambalny Central Thermal Field, Kamchatka 堪察加半岛南坎巴尔尼中央热场的构造与成因

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S0742046325700277

S. N. Rychagov, O. V. Kravchenko, E. I. Sandimirova, M. S. Chernov, S. O. Feofilaktov, I. A. Nuzhdaev, Yu. Yu. Bukatov

{"title":"The Structure and Origin of the South Kambalny Central Thermal Field, Kamchatka","authors":"S. N. Rychagov, O. V. Kravchenko, E. I. Sandimirova, M. S. Chernov, S. O. Feofilaktov, I. A. Nuzhdaev, Yu. Yu. Bukatov","doi":"10.1134/S0742046325700277","DOIUrl":"10.1134/S0742046325700277","url":null,"abstract":"Integrated geological and structural geophysical studies have shown that the South Kambalny Central Thermal Field was formed in the crater of a cone belonging to a Pliocene–Pleistocene volcano at the Kambalny Range. A geothermal reservoir has been identified beneath the thermal field; this is a rock volume rich in aqueous and steam-gas fluids. The center of the thermal field contains a zone of less dense rocks which controls the flow of ascending alkaline metal-bearing brine and is interpreted as the vent of a crater. We studied the structure of a sequence of hydrothermal clays and argillized, zeolitized, and carbonized bedrock basaltic andesites that form the base of the clay sequence. We provide a detailed characterization of newly formed mineral compounds in deposits of three types: siliceous sediments occurring along the periphery of the thermal field; carbonate concretions at the base of the hydrothermal clay sequence; and altered basaltic andesites. We have provided a substantiation: the hydrothermal mineralization, including ore mineralization, is an indicator of the influence of the deep-seated alkaline metal-bearing fluid on the zone of vapor-rich hydrothermal fluids. It is hypothesized that the sources of ore compounds, as well as of nitrogen and phosphorus, may be due to basite intrusions identified in the southern group of thermal fields in the Kambalny volcanic range.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 5","pages":"411 - 434"},"PeriodicalIF":0.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227918","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

The 2011 Eruption of the Yuzhno-Sakhalinsky Mud Volcano As a Response to the Tohoku Earthquake 2011年南萨哈林斯基泥火山爆发对东北地震的响应

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S0742046325700241

V. V. Ershov, A. V. Kopanina, K. A. Shvidskaya

引用次数: 0

On Three Laws in Earthquake Physics 论地震物理学的三个定律

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S074204632570023X

A. V. Guglielmi, A. D. Zavyalov, O. D. Zotov, B. I. Klain

{"title":"On Three Laws in Earthquake Physics","authors":"A. V. Guglielmi, A. D. Zavyalov, O. D. Zotov, B. I. Klain","doi":"10.1134/S074204632570023X","DOIUrl":"10.1134/S074204632570023X","url":null,"abstract":"This paper provides a synoptic review of the cycle of studies performed by a team affiliated with the IPE RAS in order to look for new approaches to problems of earthquake physics. The fundamental Omori, Gutenberg–Richter, and Bath laws invariably served as the basis and guiding light during our research for many years. The concept of a triad of tectonic earthquakes as a natural trinity of foreshocks, main shocks and aftershocks is used in the paper to arrange thematic material. We provide a classification for main shocks as part of six types of triad identified experimentally. We list the parameters involved in the three laws for the different triad types. An axiomatic theory is given to describe aftershock evolution. We define new concepts, viz, source deactivation, Omori epoch, and source bifurcation; as well, we introduce the concept of proper time for nonstationary lithosphere processes. Convergence of foreshocks and divergence of aftershocks are mentioned. The general conclusion runs as follows: the Omori, Gutenberg–Richter, and Bath laws provide a reliable basis for experimental and theoretical study of earthquakes. These laws possess deep content, which made itself felt in the possibility of enriching the original formulations of the first discoverers with interesting and important additional statements","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 5","pages":"480 - 489"},"PeriodicalIF":0.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227903","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

Geochemical Characteristics and the Ore Potential of the Mutnovsky Geothermal Field, Southern Kamchatka 堪察加南部Mutnovsky地热田地球化学特征及找矿潜力

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S0742046325700265

E. D. Skilskaya, A. V. Sergeeva, O. A. Zobenko, I. I. Chernev

{"title":"Geochemical Characteristics and the Ore Potential of the Mutnovsky Geothermal Field, Southern Kamchatka","authors":"E. D. Skilskaya, A. V. Sergeeva, O. A. Zobenko, I. I. Chernev","doi":"10.1134/S0742046325700265","DOIUrl":"10.1134/S0742046325700265","url":null,"abstract":"We provide data on the major and trace element composition of deep waters in the productive reservoirs beneath the Mutnovsky geothermal field confined to the eponymous active volcano in southern Kamchatka. The goal of the present study was to reveal the key role of deep-seated heat carrier in the formation of gold–silver mineralization taking the Mutnovsky geothermal system as an example. Several significant gold–silver ore deposits lie near the system. It has been found that deep waters are mostly alkaline (pH 8.85–9.74) or near-neutral (pH around 6), as well as chloride–sulfate or sulfate–chloride, potassium–sodic or sodium-potassic waters. The salinity varies in the range 260–4465 mg/L. It has been found that salinity is appreciably higher in alkaline waters than in near-neutral. Among the elements reliably detected, the highest concentrations occur for Br, As, Se, Sr, Ba, Li, Ag, and Zn. The suspended particles found in water samples contain compounds such as poorly soluble iodargyrite AgI, naumannite Ag2Se, and electrum (Au, Ag). At present these minerals are formed within the areas of deep-seated vapor-dominated hydrothermal fluids belonging to the Mutnovsky field, forming regions of present-day mineral generation. Arsenic, antimony, selenium, and tellurium occur in alkaline environments in mobile water-soluble forms, and chloride ions favor the mobilization of noble metals, e.g., gold and silver, which tend to make polysulfide and chloride complexes. The mobilization of ore elements increases in alkaline environments owing to the formation of hydroxy complexes, so that for this case alkaline waters have the highest ore potential with regard to noble-metal mineralization.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 5","pages":"435 - 450"},"PeriodicalIF":0.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227919","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

Exploration of Regression Models for Homogenization of the Earthquake Magnitude Scales to Study Earthquakes in the Andaman-Nicobar Subduction Zone 安达曼-尼科巴俯冲带地震震级均匀化回归模型的探索

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-10-05 DOI: 10.1134/S0742046325700228

Ashis Kumar Bala, Ujjwal Saha

{"title":"Exploration of Regression Models for Homogenization of the Earthquake Magnitude Scales to Study Earthquakes in the Andaman-Nicobar Subduction Zone","authors":"Ashis Kumar Bala, Ujjwal Saha","doi":"10.1134/S0742046325700228","DOIUrl":"10.1134/S0742046325700228","url":null,"abstract":"The earthquake size is quantified by seismic centers all over the world in several magnitude scales, which requires to be unified into a preferred scale to infer flawless comparison of earthquake size. The problem has been addressed by numerous researchers and converted earthquake magnitudes mostly into moment magnitude from different magnitude scales as relation among them are overdue. In this study, Simple Linear Regression (SLR), Orthogonal Regression (OR), Gaussian Process Regression (GPR), and Support Vector Regression (SVR) have been employed to find out the best method to correlate different earthquake magnitude scales. The Andaman–Nicobar–Subduction Zone, a part of the Sumatra–Andaman–Subduction–Zone which is capable of producing earthquakes of great magnitudes, has been selected for this study. For this study, earthquake data has been extracted from the International Seismological Centre (ISC) earthquake catalog. The study indicates that moment magnitude can be predicted more accurately using multiple scales than single scale. It has also been found that, the GPR model predicts higher earthquake magnitude values better than other methods. Hence, for conversion of earthquake magnitude into standard scale, use of multiple scales and the GPR method can be beneficial.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 5","pages":"490 - 507"},"PeriodicalIF":0.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227921","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

Enhancing the Sensitivity of the Seismological Network in the Lena River Delta 提高勒拿河三角洲地震台网的灵敏度

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-08-19 DOI: 10.1134/S0742046325700162

S. N. Ponasenko, P. A. Dergach, A. A. Duchkov

引用次数: 0

The Pliocene–Quaternary Volcanism in the Interfluve of the Kozyrevka and Malaya Romanovka Rivers (The Sredinnyi Range of Kamchatka): The Ages and Compositions of the Rocks 堪察加斯列丁尼山脉科日列夫卡河与马来亚-罗曼诺夫卡河河段的上新世-第四纪火山作用：岩石的年龄和组成

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-08-19 DOI: 10.1134/S0742046325700198

M. M. Pevzner, M. L. Tolstykh, V. A. Lebedev, A. D. Babansky

{"title":"The Pliocene–Quaternary Volcanism in the Interfluve of the Kozyrevka and Malaya Romanovka Rivers (The Sredinnyi Range of Kamchatka): The Ages and Compositions of the Rocks","authors":"M. M. Pevzner, M. L. Tolstykh, V. A. Lebedev, A. D. Babansky","doi":"10.1134/S0742046325700198","DOIUrl":"10.1134/S0742046325700198","url":null,"abstract":"The isotopic K–Ar ages of the volcanoes in the interfluve of the Kozyrevka and Malaya Romanovka rivers in the Sredinny Range of Kamchatka have been determined for the first time. We have identified six phases of activity: the end of the Miocene (5.8–5.5 Ma), the Early Pliocene (4.9–4.5 Ma), the Middle Eopleistocene (1.5–1.4 Ma), the Late Eopleistocene (1.1–1.0 Ma), and the Middle Pleistocene (two phases: 0.6 and 0.4–0.3 Ma). No later volcanism has been recorded in the region. It was found that the start of Quaternary volcanic activity was preceded by a repose period lasting approximately 3 Ma. It was found for the first time that the major fault striking northeast at the northern base of Romanovka Volcano could not have originated before 0.4–0.3 Ma B.P. An analysis of isotopic K–Ar dates suggests that the phases of Quaternary volcanic activity that occurred ∼1.5 and ∼0.3 Ma B.P. were regional in character. Regional activity was less pronounced for the phases ∼1.0 and ∼0.6 Ma B.P. The rocks discharged in the interfluve during the last six million years ranged between basalts and dacites. It was found that the extensive covers and major lava edifices are composed of intermediate and acid rocks, while basalts are confined to small monogenic centers. Overall, the volcanics studied here have chemical compositions that are similar to those of the Late Miocene–Quaternary rocks in the southern Sredinnyi Range. The results of our study alter significantly the previous age estimates for the volcanoes in the area of study at the Sredinnyi range. We suggest that no significant glaciation has occurred in the interfluve of the Kozyrevka and Malaya Romanovka at least during Quaternary time.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 4","pages":"337 - 354"},"PeriodicalIF":0.9,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868894","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

Magmatic Activity of Mutnovsky Volcano and the Formation of a Crater at the Place of the Blowing Well 022 穆特诺夫斯基火山的岩浆活动和吹井处火山口的形成

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-08-19 DOI: 10.1134/S0742046325700216

A. V. Kiryukhin, A. Yu. Polyakov, A. V. Sergeeva, I. A. Nuzhdaev, N. B. Zhuravlev, P. O. Voronin, O. O. Usacheva, M. Yu. Puzankov

{"title":"Magmatic Activity of Mutnovsky Volcano and the Formation of a Crater at the Place of the Blowing Well 022","authors":"A. V. Kiryukhin, A. Yu. Polyakov, A. V. Sergeeva, I. A. Nuzhdaev, N. B. Zhuravlev, P. O. Voronin, O. O. Usacheva, M. Yu. Puzankov","doi":"10.1134/S0742046325700216","DOIUrl":"10.1134/S0742046325700216","url":null,"abstract":"Mutnovsky Volcano is characterized by predominantly magmatic activity for the last 4 thousand years in the northern sector where the Mutnovsky geothermal field lies. Magmatic activity is identified using the Frac-Digger method based on seismic data as reported by the KB FRC UGS RAS. The most significant sequence of shallow dikes striking northeast has been manifested at the surface by blowing two-phase geothermal wells. Dike emplacement in March 2024 was synchronized with a hydrothermal explosion producing a crater of volume reaching 0.36 million m3 at the place of well 022 (Crater 022+). Unaltered fragments due to the explosion indicate a lithoclastic character in the gas-enriched head of the dike. The bottom of the explosion crater is a hydrothermally altered (opal, zeolite) 160 × 75 m2 in area. The mechanism of the hydrothermal explosion is treated as resulting from hydraulic fracturing by means of a shallow dike, with subsequent increase in pressure in the shallow geothermal reservoir near the well with a closed wellhead control-valve.","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 4","pages":"303 - 318"},"PeriodicalIF":0.9,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868896","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

Erratum to: The Assessment of Tsunami Hazard for the Coast of the Korf Bay, Bering Sea: Numerical Simulation 白令海Korf湾沿岸海啸灾害评估：数值模拟

IF 0.9 4区地球科学

Journal of Volcanology and Seismology Pub Date : 2025-08-19 DOI: 10.1134/S0742046325550019

V. K. Gusiakov, S. A. Beisel, O. I. Gusev, A. V. Lander, D. V. Chebrov, L. B. Chubarov

引用次数: 0