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2 Acta Geophysica Polonica

2 Górski M.

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Icequakes in Hans glacier, Spitsbergen: Source parameters of icequake series

100%

Górski M.

Acta Geophysica Polonica

2003

tom Vol. 51, nr 4

399-407

The data of icequakes series recorded in spring and summer seasons at Hans glacier, Spitsbergen, have been analysed. The determination of seismicity of the glacier, is based on temporary measurement networks placed on glacier surface. The following source parameters are analysed: seismic moments, apparent stresses, stress drops, sources diamensions and radiated seismic energies. A comparison of scalling relations for source parameters odf spring and summer series of icequakes has been made.

Application of the fracture-band model to glacier seismic event series

88%

Górski M.

Acta Geophysica Polonica

2002

tom Vol. 50, nr 3

373-379

We present an application of the fracture-band model to the study of icequake series recorded in June 1999 at Hans glacier, Spitsbergen. The determination of seismicity of the glacier is based on two measurement networks. Using the calculated data of seismic moments, stress drops, and seismic radiated energies, we are able to calculate for each event in series the values of seismic efficiency, the total released energy, the ratio of tensile stress to shear stress, the ratio of source thickness to source radius, and the damage factor.