The United States Geological Survey maintains data on large earthquakes including those of magnitude greater than 6.0 in California.

Through 2008, the ordered magnitudes of the 55 quakes are 6.1 6.1 6.1 6.1 6.1 6.2 6.2 6.2 6.2 6.3 6.3 6.3 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.5 6.5 6.5 6.5 6.5 6.6 6.6 6.6 6.7 6.7 6.7 6.8 6.8 6.8 6.8 6.8 6.9 6.9 7.0 7.0 7.0 7.1 7.1 7.1 7.2 7.2 7.2 7.2 7.3 7.3 7.3 7.3 7.4 7.8 7.8 7.9 Construct a histogram using equal-length intervals starting with (6.0, 6.3] where the right-hand endpoint is included but not the left-hand endpoint.