G. L. Panin, Yu. G. Karin, E. V. Balkov, D. I. Fadeev
{"title":"Comparison of DC Resistivity and Frequency-Domain Electromagnetic Mapping of Near-Surface Fluid Pathways at Hydrothermal and Industrial Sites","authors":"G. L. Panin, Yu. G. Karin, E. V. Balkov, D. I. Fadeev","doi":"10.1134/S074204632570040X","DOIUrl":"10.1134/S074204632570040X","url":null,"abstract":"<p>The paper presents the results of a comparative survey carried out using two geophysical methods in geothermal areas in Kamchatka and Kuril Islands, and at industrial sites in the Kemerovo region. Both site types are characterized by highly contrasting and low electrical resistivities. The results obtained by different field methods—multi-electrode direct-current resistivity imaging and frequency-domain electromagnetic induction sounding— are compared to show that these methods are complementary when studying near-surface fluid transport patterns.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S220 - S226"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339337","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":"Study of Ecological and Geochemical Characteristics of Surface Waters Using Geoinformation Technologies (Using the Kamchatka River as an Example)","authors":"A. A. Dolgaya, E. G. Kalacheva, E. V. Voloshina","doi":"10.1134/S074204632570037X","DOIUrl":"10.1134/S074204632570037X","url":null,"abstract":"<p>Based on field research data collected between 2021 and 2024, this study presents the geochemical analysis of the Kamchatka River, the primary river on the eponymous peninsula. Using geochemical data and environmental indicators from the Kamchatka River’s waters, this work demonstrates the core functionalities of the multifunctional geoinformation system, “Ecological and geochemical characteristics of surface waters in the Kuril-Kamchatka region”.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S246 - S255"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339467","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}
A. V. Sergeeva, S. N. Rychagov, O. V. Kravchenko, Ya. V. Sergeev, M. A. Nazarova, A. A. Kuzmina, E. V. Kartasheva
{"title":"The Express Characteristic of the Mineral Composition of Core Samples in Research on Modern Geothermal Systems","authors":"A. V. Sergeeva, S. N. Rychagov, O. V. Kravchenko, Ya. V. Sergeev, M. A. Nazarova, A. A. Kuzmina, E. V. Kartasheva","doi":"10.1134/S0742046325700381","DOIUrl":"10.1134/S0742046325700381","url":null,"abstract":"<p>The possibilities of using infrared spectroscopy for express characterization of the mineral composition of hydrothermally altered rocks are considered using the example of argillisites of the Yuzhno-Kambalny Central Thermal Field (Pauzhetsky district of South Kamchatka). The minerals that are indicators of sulfuric acid and carbon dioxide leaching zones of rocks have been identified, and the conditions for the transition of some mineral associations to others have been restored with changes in the temperature and geochemical regimes of the geological environment. Zones of ascending alkaline fluid are marked by carbonates and the change of feldspar into gel-like zeolite-like aggregates, with which ore minerals are often associated. To diagnose the latter, an additional method is used, that is, X-ray diffractometry. When taking a large number of core samples from geothermal deposits, this methodological approach is very relevant as it is quite reliable, rapid and economically feasible.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S235 - S245"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339709","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":"Lake Biryuzovoe (the Zavaritsky Caldera Complex, Simushir Island): Hydrothermal Activity in 2023‒2024 and the Water Balance","authors":"T. A. Kotenko","doi":"10.1134/S0742046325700435","DOIUrl":"10.1134/S0742046325700435","url":null,"abstract":"<p>The present paper reports the results from a study of hydrothermal activity in the young caldera of the active Zavaritsky Volcano (Simushir Island, the Kuriles) in 2023‒2024. Lake Biryuzovoe that fills the caldera is one of the 11 constant calderic and crater lakes on the Kuril Islands. The hydrothermal discharge was mapped from on board a drone bearing a thermal infrared camera. Hot springs are discharged into the lake on the southwestern shore for a length of 500 m, mostly below water line. The spring water has a chloride sodium composition with temperatures occasionally reaching 70°C, salinity 2.3 g/L, and pH 6.9, which is similar to the 1955 published data, that is, for an intereruptive period. Based on calculation of components in the lake water balance, the discharge of thermal waters is about 60 kg/s. Data from the literature were used to consider the variation in the physical and chemical characteristics of the lake and the southwestern springs. The 1957 eruption caused substantial changes in the southwestern springs and in the lake, both as concerns the anion and the cation part. The fresh-water cold lake was transformed into an ultra-acid one (pH 2.95) with temperature 34°C and the total chloride and sulfate ions equal to 2.4 g/L.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S193 - S200"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339329","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":"Earthquake Families on Shiveluch Volcano, Russia in 2022‒2024","authors":"A. A. Shakirova, A. S. Chemarev","doi":"10.1134/S0742046325700514","DOIUrl":"10.1134/S0742046325700514","url":null,"abstract":"<p>Young Shiveluch Volcano (Russia, Kamchatka) produced the greatest (for the last 60 years) eruption on April 10, 2023 followed by activity in the area of the old Karan extrusive dome which was active during Holocene time. The volcanic activity was accompanied by high seismic activity, with numerous long-period, hybrid, and volcano-tectonic earthquakes being recorded. Families of earthquakes have been identified using cross correlation of signal waveforms. A high correlation coefficient for earthquakes in a family tells us that the seismic source is stable in location and properties over time. The parameters of the families suggested conclusions as to various mechanisms generating repeated earthquakes. The parameters of the earthquake families provide evidence both of the extrusion of domes and of activity in the region of magma chambers at depths of 20–26 km and 1–4 km.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S110 - S117"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339393","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}
O. N. Kolesnik, A. N. Kolesnik, V. A. Rashidov, A. A. Gorbarev, P. N. Postnov, A. A. Dolgaya
{"title":"Hydrothermal Ferromanganese Crusts of the Bering Sea: Realities and Prospects","authors":"O. N. Kolesnik, A. N. Kolesnik, V. A. Rashidov, A. A. Gorbarev, P. N. Postnov, A. A. Dolgaya","doi":"10.1134/S0742046325700447","DOIUrl":"10.1134/S0742046325700447","url":null,"abstract":"<p>The current state of knowledge on ferromanganese crusts from the Bering Sea is assessed. The most poorly covered issues and prospects for further research are outlined.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S184 - S192"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339331","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}
O. A. Ulanova, P. Yu. Semkin, Yu. A. Barabanshchikov, D. D. Kharitonova, G. Yu. Pavlova, M. G. Shvetsova, V. B. Lobanov
{"title":"Ecosystem Response of the Avachinsky Gulf (Eastern Kamchatka) to the Runoff of the Nalycheva River in the Summer Season","authors":"O. A. Ulanova, P. Yu. Semkin, Yu. A. Barabanshchikov, D. D. Kharitonova, G. Yu. Pavlova, M. G. Shvetsova, V. B. Lobanov","doi":"10.1134/S0742046325700356","DOIUrl":"10.1134/S0742046325700356","url":null,"abstract":"<p>A new complex of biohydrochemical characteristics has been obtained from the middle basin of the Nalycheva River to the deep-water part of the Avachinsky Gulf and adjacent water area of the Pacific Ocean. It has been established that phytoplankton bloom with a chlorophyll <i>a</i> concentration of up to 44 μg/L in the zone of the Nalycheva River plume is caused by an intensive flux of nutrients with river runoff during spring–summer flood and by the formation of maximum water stratification. The variability of DIN/DIP ratios in the Avachinsky Gulf due to fluxes of nutrients from volcanic catchments is considered the main cause of the occurrence of “red tides” in the summer–autumn period.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S269 - S279"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339358","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}
A. G. Manevich, O. A. Girina, D. V. Melnikov, I. A. Nuzhdaev, I. M. Romanova, E. A. Loupian, A. A. Sorokin, L. S. Kramareva, S. P. Korolev, I. A. Uvarov
{"title":"The Evolution of the 300 Years of the RAS Lava Dome of the Sheveluch Volcano (Kamchatka) in 2024‒2025","authors":"A. G. Manevich, O. A. Girina, D. V. Melnikov, I. A. Nuzhdaev, I. M. Romanova, E. A. Loupian, A. A. Sorokin, L. S. Kramareva, S. P. Korolev, I. A. Uvarov","doi":"10.1134/S0742046325700563","DOIUrl":"10.1134/S0742046325700563","url":null,"abstract":"<p>The Sheveluch volcano is the northernmost active volcano in Kamchatka. In this work, we describe the activity of the new 300 Years of the RAS lava dome of volcano in 2024–2025. Explosive eruptions of the dome were observed on August 17–18, September 1–2, and November 7–10, 2024: eruptive columns rose up to 9, 8, and 11 km above sea level, respectively, and ash plumes were extended for 2400, 1100, and 3000 km to the east and northeast of the volcano. The results of detailed real-time monitoring of the volcanic eruption are presented using a video surveillance system and various satellite data from The Remote Monitoring of Volcanic Activity in Kamchatka and the Kurile Islands information system (VolSatView, http://kamchatka.volcanoes.smislab.ru).</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S63 - S71"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339701","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}
N. V. Gorbach, M. V. Portnyagin, G. N. Ovsyannikov, I. A. Nyzhdaev, T. M. Philosofova, A. A. Plechova
{"title":"First Data on Lamprophyre-Like, Amphibole-Rich Basaltic Andesites Erupted in 2024 on the Western Slope of Shiveluch Volcanic Massif, Kamchatka","authors":"N. V. Gorbach, M. V. Portnyagin, G. N. Ovsyannikov, I. A. Nyzhdaev, T. M. Philosofova, A. A. Plechova","doi":"10.1134/S0742046325700587","DOIUrl":"10.1134/S0742046325700587","url":null,"abstract":"<p>In April 2024, a new lava dome named “300 Years of the Russian Academy of Sciences” (“300 Years of RAS”) began to grow on the western slope of the Shiveluch volcanic massif in Kamchatka. The first lava and pyroclastic samples, collected shortly after dome initiation in May 2024 and following a brief explosive episode in August 2024, are composed of amphibole-rich basaltic andesites with calc-alkaline, moderate-K, high-magnesian composition (SiO<sub>2</sub> = 55.7–56.3 wt %; K<sub>2</sub>O = 1.4–1.5 wt %; MgO = 6.4–7.8 wt %; Mg# = 61–64 mol %). These rocks are mineralogically unusual for Shiveluch modern eruptions. They contain high modal amount of amphibole (up to 30 vol %), lack plagioclase phenocrysts, and contain sporadic phenocrysts of pyroxenes, and olivine grains mantled by reaction rims. These characteristics are typical of lamprophyric rocks, particularly spessartites. Petrographic and mineralogical evidence suggests that the lamprohyre-like basaltic andesites were derived from hydrous magmas ascending from mid-to-lower crustal levels (e.g. 16–24 km) of Shiveluch plumbing system. During ascent, these magmas likely interacted with andesitic magma, as indicated by amphibole–plagioclase-phyric andesite xenoliths found in early extrusive products. The eruption of rare, lamprophyre-like magmas provides new insights into deep crustal magma evolution beneath Shiveluch massif and has important implications for understanding magma transfer mechanisms and the activation of lower crustal reservoirs beneath arc volcanoes.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 1","pages":"S44 - S54"},"PeriodicalIF":0.9,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339332","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}
J. K. Mirzaakhmedov, A. A. Anarbaev, A. M. Korzhenkov, M. M. Saidov, R. N. Vakarchuk, L. A. Korzhenkova, S. D. Mirzaakhmedov, A. A. Nazarov
{"title":"On the Genesis of Damage to the Early Islamic Monuments of the Bukhara Architecture: the Samanid Mausoleum and the Magoki-Attori Mosque","authors":"J. K. Mirzaakhmedov, A. A. Anarbaev, A. M. Korzhenkov, M. M. Saidov, R. N. Vakarchuk, L. A. Korzhenkova, S. D. Mirzaakhmedov, A. A. Nazarov","doi":"10.1134/S0742046325700290","DOIUrl":"10.1134/S0742046325700290","url":null,"abstract":"<p>Archeological, archeoseismological, historical, and macroseismic studies were conducted in the Samanid Mausoleum and in the Magoki-Attori mosque identifying the presence of various seismic deformations in the walls of these ancient buildings. These include dips, bulging, collapses and rotations of structural elements around the vertical axis, as well as cracks of various origins. These seismic damage and collapses were caused by past large earthquakes: 1390 and those in the 19th century; there are other signs of damage whose ages and location are still to be determined. The aniceint sources of seismic oscillations lay south of Bukhara, the Gazli earthquakes occurred north of the town. The data we obtained indicate probable strong earthquakes occurring in the Bukhara region once per a few hundred years. Local seismic intensity caused by near earthquakes can reach values I<sub><i>l</i></sub> = 8‒9 intensity units. There is an effect that enhances the earthquake impact; this concerns settling processes developing in unconsolidated soils where Bukhara stands, as well as a high groundwater level. The source of these seismic events is the Gazli–Karatag fragment of the South Tien-Shan seismic zone, as e.g., faults of adyr folds growing near the town.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"19 6","pages":"572 - 585"},"PeriodicalIF":0.9,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145847866","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}