A review of the results obtained based on long-term observations of hydro-and meteorological parameters, carried out for many years IMGG FEB RAS. One of the main objectives of the research field of the wave variability in the coastal zone is the experimental study of marine hazards in the coastal zone, which may represent a serious threat to the coastal settlements. IMGG FEB RAS holds the full cycle investigations of wave parameters at the coastal area till the creation of instruments to the measurement and software systems for the analysis of the results to the direct analysis of the field data.

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Significant wave heights and most probable wave heights in the nearshore areas of the Southern Kuril Islands are considered in this paper. These characteristics were obtained from data of in-situ measurements of hydrostatic pressure in the depth range from 5 to 25 m. The measurements have been performed in 2008 and 2009. It is shown in the paper that relatively calm sea surface was observed in time period from July till first half of September. Most probable wave heights varied from 0.17 m to 0.27 m and maximal values of significant wave heights varied from 0.75 m to 1m in the depth range from 15 to 25 m. For depths less than 15 m most probable wave heights varied from 0.05 m to 0.1 m and maximal values of significant wave heights varied from 0.68 m to 1m. Time period from second half of September is characterized as stormy period. Maximal values of significant wave height reached 5 m at that time and most probable wave heights varied from 0.1 to 1 m depending on depth and location. Period from January till April can be characterized by high number of moderate storms with maximal value of significant wave heights 1.8 m and most probable wave heights from 0.13 to 0.33 m.

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