Contents

Russian Journal of Pacific Geology

Vol. 20, No. 1, 2026

Picrites of the Kamchatka–Koryak Region

Z. G. Badredinov and B. A. Markovsky p. S1  abstract

Noise Assessment of Potential Gravity Measurements Based on Seismic Data on the Kamchatka Peninsula

M. N. Drobyshev, E. A. Matveenko, D. V. Chebrov, and A. I. Koneshov p. S15  abstract

Stress State of the Earth’s Crust of the Kuril Arc in the Area of Iturup Island Based on the Results of Tectonophysical Reconstructions

D. S. Myagkov, I. V. Bondar, D. E. Beloborodov, and T. Yu. Tveretinova p. S21  abstract

Detailing the Time Frame of Geodynamic Processes on Sakhalin Island in the Cenozoic

V. A. Degtyarev and P. A. Kamenev p. S35  abstract

Eruption of the Main Pugachevsky Mud Volcano on September 8, 2024 (Sakhalin Island)

R. V. Zharkov p. S46  abstract

The MW = 8.8 Kamchatka Megathrust Earthquake of July 29, 2025

D. V. Chebrov p. S52  abstract

Lithology and Formation Settings of the Pospelovo Formation in Southern Primorye: New Data

A. I. Malinovsky p. S56  abstract

Sedimentation Environment in the Tatar Strait of the Sea of Japan

D. D. Rykavishnikova, K. A. Dozorova, and B. V. Baranov p. S69  abstract

Possibilities of Using the MultAlt Computer Technology for Regional Assessment of Promising Areas Based on a Complex of Geological Features

D. F. Kalinin, N. V. Bolshakova, A. S. Egorov, and V. V. Glazunov p. S83  abstract

New Data on Fahlores of the Vilyuchinskoe Ore Occurrence (Southern Kamchatka)

K.O. Shishkanova p. S93  abstract

Application of Coherent Analysis in Studying Deep Long-Period Earthquakes of Klyuchevskoy Volcano (Kamchatka, Russia)

A. A. Shakirova, P. A. Malyutin, V. A. Saltykov, and A. S. Chemarev p. S100  abstract

Amphibole Megacrysts in Pyroclastics from Secondary Eruptive Centers of Kronotsky Volcano

G. N. Ovsyannikov, N. V. Gorbach, and A. N. Rogozin p. S110  abstract

Crater Formation in Borehole 022 at the Mutnovsky Steam Hydrothermal Field in 2023 (Kamchatka)

A. A. Nuzhdaev, R. A. Kuznetsov, I. E. Bolshakov, A. N. Matveev, and V. O. Davydova p. S122  abstract