Contents

Journal of Volcanology and Seismology

Vol. 20, No. 5, 2026

Permian–Triassic Volcanic Rocks, Central Part of the Okhotsk Terrane: Petrography, Geochemistry and Geochronology

V. N. Alexandrov, A. K. Khudoley, G. N. Ovsyannikov, V. B. Khubanov, and V. A. Plaksina p. 305  abstract

First Results of the Volcanological Multiparametric Automated Complex (VMAC) Operation on the Avachinsky Volcano

Ya. A. Bakhmatova, A. Yu. Ozerov, and D. V. Melnikov p. 322  abstract

The 2025 Activity of Kamchatka and Kurile Volcanoes and Their Danger to Aviation

O. A. Girina, A. G. Manevich, D. V. Melnikov, I. M. Romanova, A. A. Nuzhdaev, E. A. Loupian, A. A. Sorokin, L. S. Kramareva, S. P. Korolev, and Yu. V. Demyanchuk p. 331  abstract

Ecological-Geochemical Characteristics and Evolution of the Chemical Composition of Lake Karymsky after the Underwater Eruption in the Academii Nauk Caldera in January 1996 (Kamchatka Peninsula)

E. G. Kalacheva and E. V. Voloshina p. 343  abstract

Monitoring of the Avachinsky Volcano Crater Zone Using GNSS Observations and Unmanned Aerial Photography in 2020–2025

I. K. Mironov, K. M. Maguskin, and V. M. Maguskin p. 357  abstract

Sulfides and Intermetallics in Mantle Peridotites from the Kamchatsky Mys (Eastern Kamchatka)

D. P. Savelyev and S. V. Moskaleva p. 362  abstract

The Chemical and Isotope Composition (H–O–C–S) of Hydrothermal Solutions and Gases in the Koshelevsky Volcanic Massif, Kamchatka, Russia

Yu. A. Taran, E. G. Kalacheva, E. V. Voloshina, S. N. Rychagov, and A. V. Ermakov p. 368  abstract

Trends of Incoherent Elements in High-Magnesian Basalts of the Tolbachinsky Dol (Kamchatka) and the Possible Causes of Their Occurrence

R. I. Cherkashin, A. Yu. Ozerov, and A. P. Maksimov p. 380  abstract

Erratum

Erratum to: Likely Sources of Lithium Mineralization in Intersalt Deposits and a Hydrogeological Model for the Angara–Lena Deposit of Commercial Lithium-Bearing Brine in the Siberian Platform

A. G. Vakhromeev, M. A. Danilova, E. V. Demidova, S. K. Kvachko, A. V. Kiryukhin, A. T. Korolkov, A. V. Sergeeva, A. V. Oshchepkova, A. V. Levin, A. P. Gorokhov, A. S. Tsoi, and V. V. Lukyanov p. 392  abstract