(AUI), the nonprofit research corporation that operates the National Radio Astronomy Observatory (NRAO). ![]() Two teachers from the town of San Pedro de Atacama, in the northern desert of the South American nation of Chile, arrive in Magdalena, New Mexico, Sunday, January 28, for a two-week visit that is part of a Sister Cities program sponsored by Associated Universities, Inc. Moreover, with this new ML scale the seismicity caused by tectonic or fracking activity at VMM region can be monitored more accurately.Ĭhilean Teachers Begin Exchange Program Visit in Magdalena With this new scale ML values are adjusted to local conditions beneath VMM region leading to more realistic ML values. Higher values of ML were obtained for VMM region compared with those obtained with the current formula used for ML determination, and with California formula. The derived local magnitude scale for VMM region was: ML =log(A) + 1.3744 âˆ- log(r) + 0.0014776 âˆ- r - 2.397 + S Where A is the zero-to-peak amplitude in nm in horizontal components, r is the hypocentral distance in km, and S is the station correction. ![]() ![]() Local magnitude scale for Valle Medio del Magdalena region, ColombiaĪ local Magnitude (ML) scale for Valle Medio del Magdalena (VMM) region was defined by using 514 high quality earthquakes located at VMM area and inversion of 2797 amplitude values of horizontal components of 17 stations seismic broad band stations, simulated in a Wood-Anderson seismograph.
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