In the conventional method of locating an earthquake epicentre by intersecting distance circles derived from P–S arrival-time differences, data from how many independent seismic stations are normally required?
Three
In the conventional distance-circle method, each station’s P–S arrival-time difference gives an epicentral distance. Two circles can intersect at two points; a third independent station resolves the location. Hence three stations are required.
Important Questions from Miscellaneous
Which gas shields the surface of the earth from ultraviolet radiation from the sun?
Which event is marked as an Intangible Cultural Heritage of Humanity by UNESCO?
Who has been conferred with the rank of the Commander of the Order of the British Empire in 2018?
Who directead the film ‘Bhuvan Shome’?
The book “In my mother’s house” is written by _______
