The statistics for earthquakes for the whole world in the last week give a rough impression of what is happening. There is a relative absence of earthquakes about magnitude 4.0. It seems to be indicative of two populations at the present time.
Another way of looking at the data is with a histogram which plots counts for equal intervals of magnitude. More data might give improved estimates of the probabilites of an earthquake of a given magnitude. That's one reason for studying all the earthquakes at this time. The accuracy of results depends on the number of events in a particular interval so one can't really trust the curve at higher magnitudes. There is no doubt that there are fewer 4.0s present.
Another way of looking at the data is with a histogram which plots counts for equal intervals of magnitude. More data might give improved estimates of the probabilites of an earthquake of a given magnitude. That's one reason for studying all the earthquakes at this time. The accuracy of results depends on the number of events in a particular interval so one can't really trust the curve at higher magnitudes. There is no doubt that there are fewer 4.0s present.
No comments:
Post a Comment