Analysis of accelerograms recorded in the source zone of the 1995 Neftegorsk earthquake and computation of synthetic accelerograms

The strongest Neftegorsk earthquake, which occurred in 1995 in the northern part of the Sakhalin Island, was studied by the Epicentral Seismological Expedition, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. The performed observations yielded the unique accelerograms of strong aftershocks, which were then applied as a basis for detailed analyses. The recorded accelerations were in satisfactory compliance with the current ground motion relations. The design spectra developed on the basis of analyzed records were proposed as an example. The synthetic accelerograms were calculated using the records of the strongest aftershocks for two modal earthquakes by the empirical Green’s function technique. This technique can be recommended for practical application as the most physically substantiated method taking into account all regional features.