Figure 2

Cross-correlation results for 29 different time scales. The values for \(\rho _{DCCA}\) between RMS and the nearby ER presented a strong, significant correlation. LTN, REC and PGU stood out by exceeding the correlation level of 0.66, for the scale of 33 days, remaining strong for all subsequent time scales. LL and UL represent the low and upper limits respectively, and blue line and red line are the significant level values calculated with confidence intervals equal to 95% through the time scales (weeks)²³. The labels as follows are: economic regions in Bahia, Brazil. The metropolitan region of Salvador (RMS), Litoral Norte (LTN), Nordeste (NDE), Piemonte da Diamantina(PIE), Paraguaçu (PGU), Recôncavo (REC), Litoral Sul (LTS), Extremo Sul (EXS), Sudoeste (SDE), Serra Geral (SGE), Chapada Diamantina (CHP), Irecê (IRC), Baixo Médio São Francisco (BMF), Médio São Francisco (MSF), Oeste (OST).The division was extracted from²⁴.