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  • 1975-1979  (4)
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  • 1
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    Unknown
    Detection probabilities for weak regional seismic events (1979)
    In:  Journal of geophysics = Zeitschrift für Geophysik
    Details
    Publication Date: 2020-02-12
    Description: 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
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
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  • 2
    facet.materialart.
    Unknown
    Detectability of regional events by means of the Swedish seismography station network (1979)
    In:  Uppsala Reports ; 7-79
    Details
    Publication Date: 2020-02-12
    Description: 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
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/report
    Location Call Number Limitation Availability
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  • 3
    facet.materialart.
    Unknown
    Duration magnitudes for Swedish earthquakes (1979)
    In:  Report 5/79
    Details
    Publication Date: 2020-02-12
    Description: By calibration with the M"SUB L"-scale for Fenno-scandian earthquakes, a regional magnitude formula for Swedish earthquakes based on signal duration is developed for each of the six stations of the Swedish Seismography Station Network. Derived formulae are of the type M"SUB tau" = C"SUB 1" + C"SUB 2" (log tau)"SUP 2" or M"SUB tau" = C"SUB 1" + C"SUB 2" (log tau)"SUP 2" + C"SUB 3"delta, where C"SUB 1", C"SUB 2" and C"SUB 3" are constrants, specific for each station, tau is the recorded signal duration after Sg-wave onset and delta is the epicentral distance. -Author
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/report
    Location Call Number Limitation Availability
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  • 4
    facet.materialart.
    Unknown
    Magnitude-scaling of earthquakes in Fennoscandia (1979)
    In:  Geophysica / Geofysiikan Seura
    Details
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
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