Journal of Volcanology and Seismology
ISSN (PRINT): 0203-0306
Media registration certificate: No. 0110147 dated 02/05/1993
Founder: Institute of Volcanology and Seismology, Far Eastern Branch of the Russian Academy of Sciences (Petropavlovsk-Kamchatsky), Russian Academy of Sciences (Moscow)
Editor-in-Chief: Sobisevich Alexey Leonidovich Doctor of Physical and Mathematical Sciences, Corresponding Member of the Russian Academy of Sciences
Number of issues per year: 6
Indexation: RISC, List of Higher Attestation Commissions, RSCI Core, white list (2nd level)
Journal of Volcanology and Seismology is an international peer-reviewed journal that publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them. The journal welcomes manuscripts from all countries.
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No 5 (2025)
Articles
DETECTION OF WEAK AFTERSHOCKS AT REGIONAL AND TELESEISMIC DISTANCES
Abstract
High postseismic activity is often observed in areas far beyond local and regional seismic networks. The International Monitoring System (IMS) includes dozens of highly sensitive seismic arrays, which, together with new signal processing methods, significantly lowers the threshold for event detection in both continental and oceanic zones. Monitoring the postseismic process at the DPRK “Punggye-ri” test site, located near an extinct volcano, has been ongoing for more than seven years, creating almost laboratory conditions for more accurate assessment of the parameters of explosions and their, mostly weak (ML from 2.2 to 4.0), aftershocks based on data at distances from near-regional (~400 km) to teleseismic. Application of the waveform cross-correlation method at IMS arrays allowed us to detect 61 weak events at the test site, compared to 11 published in the official bulletin of the International Data Center. The methods and results of reconstructing the parameters of the postseismic activity of the explosions at “Punggye-ri” are used in the analysis of aftershock sequences of tectonic and volcanic earthquakes in different parts of the earth using IMS data.
Journal of Volcanology and Seismology. 2025;(5):3-18
3-18
Determination of earthquake magnitudes based on the records of ocean bottom seismographs
Abstract
This paper provides an overview of the available relationships for calculating magnitudes from earthquake signal durations, as well as a refinement of the magnitude relationship for bottom seismic records. The original formula was obtained as a result of seismological monitoring in the Aegean Sea. The correction was performed using the data from a number of experiments with ocean bottom seismographs and using data from on-land seismic stations. The experiments were conducted in the waters of the internal and marginal seas of the Russian Federation: the Caspian, Baltic, Black, Laptev Sea, and in the Pacific Ocean. To model signals of microearthquake with a magnitude less than 1, records of an air gun obtained using an ocean bottom seismograph in the Black Sea were used. The corrected magnitude ratio is recommended to be used for processing in processing earthquake records obtained by ocean bottom seismographs with a number of limitations, which are mainly associated with the parameters of local seismic noise at the location of the ocean bottom seismographs.
Journal of Volcanology and Seismology. 2025;(5):19-38
19-38
Beltir earthquake 2025, ML = 6.4 (Mountain Altai)
Abstract
Seismological data on the Beltir earthquake of February 15, 2025 with ML = 6.4 and its aftershock process are analyzed. The earthquake was felt at distances of more than a thousand km from the source. It is shown that the main event and the aftershock process occurred near the source area of the 2003 Chuya earthquake and, at the same time, outside it. The earthquake is accompanied by an aftershock process, weak in the number and energy of events. The difference in magnitude between the main event and the strongest aftershock is three units. It can be interpreted either as ongoing activation of adjacent structures [Emanov et al., 2017, 2023] or as close in time activation of a complex block structure [Rogozhin, 2021].
Journal of Volcanology and Seismology. 2025;(5):39-47
39-47
Deep structure and earthquake sources along the sub-latitude profile of the northern Sikhote-Alin‒Sakhalin
Abstract
A consolidated seismogeological section of the Earth's crust along the Northern Sikhote-Alin–Sakhalin with a length of 350 km and a depth of 40 km on the area of 51.7°– 52.4° N, 138.5°– 143.3° E was compiled. The seismic information on the eastern end of the Basalt Geotraverse and the results of previous deep seismic surveys by deep seismic sounding (DSS) and earthquake converted-wave method (ECWM) were used. The section shows not only the relief and position of the basement and Mohorovicic discontinuity, but also the boundaries in the volcanogenic-sedimentary complex and in the consolidated part of the crust. Comparison of the depth-velocity structure with the distribution of local earthquake hypocenters has shown that the seismically active region of Northern Sakhalin and the adjacent part of the Tatar Strait is characterized by crustal seismicity confined to the large regional faults and their feathering disturbances.
Journal of Volcanology and Seismology. 2025;(5):48-57
48-57
Seismic dislocations and stressed states of the Meldek segment of the Lanko-Omolon fault zone (Northern Priokhotye)
Abstract
The results of a comprehensive study of the Meldek seismodislocation are presented, including an analysis of its morphosculpture, morphostructure, and stress-strain states. It was established that the movement along the seismic rupture included components of horizontal extension and right-lateral strike-slip, which is characteristic of the Lankovo-Omolon fault zone. The formation of thrust-fault scarps is associated with deformation along antithetic (R') fractures. The estimated magnitude of the seismic event, based on morphometric analysis of the fault scarps, ranges from 5.4 to 7.2. According to lichenometric data, the age of the seismic event exceeds 3000 years. Seismogravitational landforms formed 30–35, 150–170, and 400–500 years ago have also been identified.
Journal of Volcanology and Seismology. 2025;(5):58-74
58-74
Microminerals as evidence for metallogenic specialization and ore potential of quaternary lavas from the Gorely volcano (Kamchatka)
Abstract
Quaternary lavas from the Gorely volcano (Kamchatka) contain microinclusions of native metals, silver, copper and tin alloys, silver and copper sulfides and chlorides occassionally with minor tin, uranium and carbonaceous matter, as well as tungsten carbides, cassiterite and barite. These assemblages of microinclusions are similar to the typomorphic mineral associations in the epithermal deposits from the Russian Far East, as well as in some uranium- and silver-rich iron oxide-copper-gold (IOCG) deposits in Australia. Lavas from the Gorely volcano contain elevated Ag, W and, to a lesser extent, Cu, Mo, Cd, Bi contents. Some Gorely samples exhibit elevated Sn and Sb concentrations in comparison with other Kamchatka volcanoes. We conclude that the ore metal mobility is caused by presence of sulfur and chlorine in hydrothermal fluids that accompanied crustal evolution of Gorely magmas along with their emplacement at the surface and, possibly, post-eruptive transformation in active fumarolic fields. Assemblages of microminerals observed in the Gorely lavas may record early stages of formation of epithermal, porphyry and IOCG magmatic-hydrothermal ore systems in the process of volcanic activity in modern subduction zones.
Journal of Volcanology and Seismology. 2025;(5):75-92
75-92