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DDC:
550 - Earth sciences
Abstract:
A modification of the direct estimation method for threshold magnitudes, originally associated with teleseismic events, is developed. The modified approach enables one to apply the method even to weak events from regions with low seismicity like e.g. Sweden. It is assumed that observations are supplied solely by a seismograph network located within the region. Numerical results reveal that a Swedish earthquake with magnitude 2.0 or larger will, with 90% probability, be detected by at least one station of the current Swedish Seismograph Station Network. Addition of three new stations would decrease (i.e. improve) the threshold to a magnitude of about 1.5.-Authors
