Abstract <p>This paper describes the results of the 2024 visual and instrumental observations of eruptions at Grot Geyser in Geyser Valley, Kamchatka. It was found that the eruption behavior of Grot Geyser has significantly changed: while previously being an irregularly erupting geyser, Grot had become a relatively regularly erupting geyser whose interval between eruptions were 10.4 h during the winter low-water period, an intermission during the most intensive flood, and a subsequent resumption of geyser activity at intervals of 24&#xa0;h. The volume discharged by a Grot eruption is estimated as ≈70 m³ using the chloride tracer method.</p>