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How many magnitude 4+ quakes happened each year. The tall bars line up with big earthquakes and the aftershocks that followed.
How many quakes there were at each magnitude. Each step up the side means ten times more quakes.
What b comes out to depending on where I put the cutoff. The shaded band is the margin of error (one standard error).
Does b change across the region? Each dot is a region's estimate and the line is its margin of error. The blue band is the overall estimate. Shallow quakes only, since the deep Hindu Kush ones behave differently.
Hover over a circle to see its magnitude and date. The map only has M4.5 and up, to keep the page light, and it shows quakes at every depth, including the deep Hindu Kush ones the b-values leave out.
Take these counts as a rough guide. The 110 km box can miss aftershocks along a long rupture, and I only count M4.5 and up, so small aftershocks right after a big quake are probably missing. Nearby quakes also share aftershocks, so don't add the rows up.