Zobrazeno 1 - 10
of 11
pro vyhledávání: '"K. G. Barr"'
Publikováno v:
Canadian Journal of Earth Sciences. 11:1534-1549
A detailed reflection–refraction experiment was conducted near Yellowknife, Northwest Territories, in 1969. Over 3000 seismograms were recorded along two profiles with a geophone separation of 250 m. The high quality, quantity and unexpectedly high
Autor:
K. G. Barr
Publikováno v:
Journal of Geophysical Research. 76:1929-1947
A crustal refraction experiment was carried out around Yellowknife, Northwest Territories, in 1966. The pattern of shots and stations was designed for time-term interpretation over a wide area, traversed by a more detailed line of interspersed shots
Autor:
K. G. Barr
Publikováno v:
Canadian Journal of Earth Sciences. 4:961-975
Long-range seismic observations at the standard Canadian seismic stations, from chemical explosions in Hudson Bay and Lake Superior, are used to derive a P-wave velocity structure for the upper mantle. The coordinates of observed cusps are used to de
Autor:
G. R. Robson, K. G. Barr
Publikováno v:
Bulletin Volcanologique. 27:315-330
The stress field in the vicinity of a body of fluid of simple geometry contained within a non-homogeneously stressed solid has been calculated and the result applied to the case of a magma body within a region of the crust subject to triaxial stresse
Autor:
K. G. Barr, M. J. Berry
Publikováno v:
Canadian Journal of Earth Sciences. 8:347-360
During the spring of 1967, a seismic refraction experiment was conducted from the SW tip of Prince Patrick Island in the Queen Elizabeth Islands of Arctic Canada to a point mid-way down the continental slope, some 220 km from the coast.It was found t
Autor:
K. G. Barr
Publikováno v:
Bulletin of the Seismological Society of America. 54:1473-1477
A method is described for calibrating Willmore seismographs. It could be applied to any other electromagnetic seismograph having a galvanometer period substantially shorter than the seismometer period. The method is rapid and involves very little equ
Autor:
K. G. Barr, G. R. Robson
Publikováno v:
Geophysical Journal International. 7:342-349
i The intervals between the arrivals of the same body wave phases from distant earthquakes at a close network of stations are compared with those expected from the known surface speeds of the phases. The arrival at the station on the island of Barbad
Autor:
K. G. Barr
Publikováno v:
Bulletin of the Seismological Society of America. 52:455-461
A frequency selective amplifier has been developed to increase the useful sensitivity of short period electromagnetic seismographs to near earthquakes. The result has been to reduce the magnitude of the smallest earthquake detectable by about two uni
Publikováno v:
Nature. 195:972-974