This work describes the results of processing experimental data during synchronous registration of the crust deformations and oscillations of atmospheric and hydrospheric pressures. It was found that internal marine waves with a frequency range from 5 to 20 min are mainly generated by atmospheric disturbances, whose variations are absolutely identical to those of hydrospheric pressure in the shelf zone of the Sea of Japan.

Based on experimental data on earthquakes under the oceans recorded with a 52.5-m laser deformograph, perspectives of the application of this device for determining the tsunami potential of earthquakes are substantiated. Since the velocity of propagation of tsunamigenic deformation anomalies is much greater than the velocity of these waves, the deformation method for determining the tsunami potential of earthquakes is the most promising technique for the tsunami warning services. The tsunamigenic deformation anomalies appear during different geodynamic processes. In general, these anomalies are related to earthquakes. The oscillations that appear during earthquakes in their focus cannot generate a tsunami. They only shake the bottom in the frequency range corresponding to a period of n ‐10 n s. The deformation anomalies are located in the extreme left frequency range and cannot be recorded by any (even broadband) seismographs. The hydrological installations used to record tsunamis are inefficient because the distance from the point of recording of a tsunami to its spreading on the shelf is virtually always small and there is not enough time for the efficient accomplishment of corresponding actions. Installations that can record deformation motions leading to tsunami generation are most promising for these goals because the velocity of deformation motion spreading in an elastic medium is more than one order of magnitude greater than the velocity of a tsunami. Laser deformographs of the horizontal and vertical types are the best devices for their recording and direction finding because of their main characteristics: the higher accuracy and wider frequency range of measurement of microdisplacement of the Earth’s crust using the deformographs (0.1 nm and 0‐1000 Hz, respectively). The dynamic range for measuring natural processes of the infrasound range is practically unlimited [1]. Currently, variations in the deformation rate of the Earth’s crust are monitored at the Cape Shultz station of the Pacific Institute of Oceanology using a 52.5-m horizontal laser deformograph with the characteristics listed above [2]. In this article, we analyze the records of the laser deformograph of the signals related to the tsunami