Fig. 2
From: An updated and refined catalog of earthquakes in Taiwan (1900–2014) with homogenized M w magnitudes
Logarithmic plots of the cumulative number of earthquakes in Taiwan per year versus magnitude. For each, we selected a 3.9 ≤ M w ≤ 4.9, b 5.5 ≤ M H ≤ 6.5, c 4.0 ≤ M D(A) ≤ 5.0, d 4.0 ≤ M D(D) ≤ 5.0, and e 4.6 ≤ M L ≤ 5.6 as the critical magnitude ranges to calculate the values of a and b. We then used these values to derive the relationships used to convert the original magnitudes from different time periods to a common M w magnitude scale