Václav Láska

Václav Láska (1862–1943) was a renowned Czech astronomer, geophysicist, and mathematician. He conducted most of his work at Charles University.

Václav Láska

Láska's empirical rule

This empirical rule is one way how to approximate the distance from an earthquake's epicenter. The rule is most fitting for distance in the range of 2 − 10 Mm (thousand km). The epicentral distance in thousands of km is roughly equal to the difference between arrival times of S and P waves in minutes minus 1.

The error of Láska's empirical rule
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