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4 figs., 11 refs.
DDC:
550 - Earth sciences
Abstract:
The direct estimation method for threshold magnitudes associated with teleseismic events is well known and frequently used. A modification of the method is developed in order to make the approach applicable to events from regions with low seismicity. It is assumed that observations are supplied by a seismograph network located within the region. As an example, threshold magnitudes are given for the Uppsala station, Sweden. Reliability of the suggested approach is examined by means of a rockburst series.-Authors