Features of earthquakes that occurred in the Khabarovsk region in April 2025

An express analysis of two perceptible earthquakes that occurred in April 2025 in the Khabarovsk region on April 2, 2025 at 05:48 with ML=3.9 and on April 14, 2025 at 11:32 with ML=3.3. The earthquake parameters were determined in real time by the duty shift of the Yuzhno-Sakhalinsk Regional Seismic Center based on the data from the regional network of the Sakhalin Branch GS RAS and were refined in the Department of consolidated seismic data processing of the Sakhalin Branch GS RAS using the data from the stations of both the regional network and the local network of the south of Sakhalin Island, as well as the stations of the network of the Yakut Branch GS RAS. The epicenters of both earthquakes are confined to the Middle Amur and Coastal Primorsko-Priamurskaya zones of the Sikhote-Alin region of Primorye and Priamurye, the seismicity of which is extremely low, the last perceptible earthquakes in these zones occurred 100 and 50 years ago. Focal mechanisms of both earthquakes have been constructed. Macroseismic data have been collected and a map of the manifestations of the earthquake on April 14 in different parts of Komsomolsk-on-Amur with an intensity of 2 to 4 points has been compiled, which clarifies the clearly underestimated assessment of emergency services (1–2 points).