There is some variation of  b-values in the approximate range of 0.5 to 2 depending on the source environment of the region. A notable example of this is during earthquake swarms when b can become as high as 2.5, thus indicating a very high proportion of small earthquakes to large ones.
There is variability in b-values within the range of 0.5 to 2, depending on the source environment. During earthquake swarms, b-values can increase to as high as 2.5, suggesting an abundance of small earthquakes relative to larger ones.