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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Table 1 Thresholds of correlation coefficient r used for the gradation of significance level of the periodic component in hydrologic time series

From: Correlation-aided method for identification and gradation of periodicities in hydrologic time series

Significance level No Weak Moderate Strong Dramatic
Correlation coefficient \(0 \le \left| r \right| < r_{\alpha }\)a \(r_{\alpha } \le \left| r \right| < r_{\beta }\)a rα ≤ |r| < 0.6 0.6 ≤ |r| < 0.8 0.8 ≤ |r| ≤ 1
  1. aα and β are both significance levels and α > β