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Václav Láska (mathematician)
Czech surveyor, astronomer, geophysicist and mathematician From Wikipedia, the free encyclopedia
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Václav Jan Láska (1862–1943) was a Czech surveyor, astronomer, geophysicist, and mathematician. He was based mainly at Charles University, and was the founding director (1920-1933) of the State Institute of Geophysics, which later became the Institute of Geophysics of the Czech Academy of Sciences.
![]() | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (April 2025) |

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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.

External links
- Charles University, Faculty of Mathematics and Physics, Department of Geophysics (in Czech)
- MacTutor Entry (in Czech)
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