Abstract Mutnovsky Volcano, ∼70 km SW of Petropavlovsk‐Kamchatsky, exhibits persistent degassing, hosts active hydrothermal springs and the Mutnovsky Geothermal Power Plant (MGPP) on its slopes. Using the network covariance matrix approach, we analyzed seismic data recorded in 2023–2024 by 15 seismic stations operating around Mutnovsky Volcano. We detected seismic tremor in the 1.5–5 Hz frequency range beginning on 6 February 2024, ∼10 days before a series of hydrothermal explosions occurred in the vicinity of the MGPP. The timing of these explosions was refined based on satellite imagery. Most of the tremor sources were located beneath the northeastern slope of the volcano at shallow depths. The spatiotemporal evolution of tremor activity, alongside independent volcanological data, suggest it was generated by magma‐hydrothermal processes activated by a magmatic fluid influx, which caused the hydrothermal explosions. Thus, observations of such seismic tremors may provide a short‐term precursor for future hydrothermal explosions.