Fig. 10
From: Visualizing heterogeneities of earthquake hypocenter catalogs: modeling, analysis, and compensation
Temporal detection rate analysis of earthquakes. Detected earthquakes off the coast of southern Urakawa (Urakawa-Oki, (A)), Hokkaido (1926–1990), B cumulative number of earthquakes by year since 1926 with the corresponding magnitude versus occurrence time plot, Ca b values (b = β loge 10) against time in years, Cb μ values (50% detection rate) against time in years, Cc σ value against time in years, and D magnitude frequency histograms (“+” sign) of in time spans Da 1926–1945, Db 1946–1965, Dc 1966–1975, Dd 1976–1983, and De 1984–1990 with the estimated frequency-density curves at the middle time (indicated by the squared a–e in panel C) in the corresponding time spans, where x-axis is for magnitude and y-axis is the frequencies given in logarithmic scale. Theoretically calculated two-fold standard error curves are provided for each interval