Abstract—The connection between the properties of seismic noise continuously recorded by the network of 21 broadband seismic stations in Kamchatka during nine years of observations (2011–2019) and the nonuniform rotation of the Earth is studied. The daily time series of median values calculated ​​over all network stations are analyzed for three noise parameters: multifractal singularity spectrum support width, generalized Hurst exponent, and minimum entropy of the distribution of the squared orthogonal wavelet coefficients. For identifying the common components in the variations of these parameters, their adaptive first principal component was calculated in a half-year moving window. The quadratic coherence spectrum between the first principal component of seismic noise characteristics and the time series of the length of the day was calculated in a 182-day moving time window. The time–frequency diagram of the coherence spectrum characterized by a sequence of coherence bursts concentrated in a narrow frequency band with periods from 11 to 14 days is analyzed. The time delays between the coherence bursts and the release of seismic energy in Kamchatka are estimated in a 5-year moving time window.

摘要-研究了在连续9年的观测期间（2011-2019年），由堪察加的21个宽带地震台站网络连续记录的地震噪声的性质与地球非均匀旋转之间的联系。分析所有网络站点上计算的每日中值的时间序列，以分析三个噪声参数：多重分形奇异谱支持宽度，广义Hurst指数和正交小波系数分布的最小熵。为了确定这些参数变化中的共同成分，在半年的移动窗口中计算了它们的自适应第一主成分。在182天的移动时间窗口中，计算了地震噪声特征的第一主成分与一天中时间长度的时间序列之间的二次相干谱。分析了相干谱的时频图，其特征是相干脉冲序列集中在一个狭窄的频带中，周期为11到14天。堪察加半岛相干爆发与地震能量释放之间的时间延迟是在5年的移动时间窗口内估算的。