pure and applied geophysics

, Volume 63, Issue 1, pp 23–30 | Cite as

On seismic activity

  • Wolfgang Ullmann
  • Richard Maaz


Seismic activity at a point of the surface of the earth up to a given time has to be computed by the total energy per unit area at the point considered in consequence of the earthquakes up to that time. The definition of seismic activity of a region can be developed from that. Seismic activity in a given time-interval results from earthquakes up to the upper limit of that interval. In consequence of a suitable valuation seismic activity is always convergent. For sufficiently large time-intervals a formal relationship between seismic activity and seismicity can be constructed.


Total Energy Unit Area Seismic Activity Formal Relationship Suitable Valuation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. [1]
    W. Ullmann andR. Maaz,A New Method for Computation of Seismicity, Pure and appl. Geoph.63 (1966) 15.Google Scholar

Copyright information

© Birkhäuser Verlag 1966

Authors and Affiliations

  • Wolfgang Ullmann
  • Richard Maaz

There are no affiliations available

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