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Nino M.,National Autonomous University of Mexico | Jaimes M.A.,National Autonomous University of Mexico | Reinoso E.,National Autonomous University of Mexico | Reinoso E.,ERN Inc
Natural Hazards | Year: 2014

A seismic-event-based methodology to generate earthquake-induced translational landslide maps using Newmark method is proposed. The steps are: (1) to construct a GIS-based geotechnical database; (2) to identify those areas that are susceptible to the occurrence of translational landslides based on available geological information; (3) to compute a static safety factor; (4) to compute the critical acceleration that defines the threshold acceleration required to cause a displacement; (5) to characterize the seismic hazard as a set of stochastic events, collectively exhaustive and mutually exclusive, that fully describes the hazard spatial distribution and annual frequency of occurrence (in accordance with the earthquake location, depth and magnitude) with the appropriate ground-motion prediction equations; (6) to compute the Newmark displacement; and finally, (7) to carry out a probabilistic translational landslide hazard analysis to estimate an exceedance rate of a given displacement. This methodology is applied to Mexico, and maps for return periods of 150 and 500 years are presented. Results shown in maps are estimations of where translational landslides may occur and should be useful to carry out local studies to elaborate recommendations of site specific hazard reduction plans as well as to calculate insurance rates. In addition, these results are useful to identify civil protection actions, risk management at regional and local level, and land use planning, as well as for promoting more detailed vulnerability and risk studies at different scales. © 2014 Springer Science+Business Media Dordrecht. Source


Jaimes M.A.,National Autonomous University of Mexico | Nino M.,National Autonomous University of Mexico | Huerta B.,ERN Inc
Natural Hazards | Year: 2015

This paper proposes a hurricane event-based method to construct a map for heavy rainfall-induced translational landslides. This method involves five steps: (1) construct a GIS-based geotechnical database; (2) identify the areas in the vicinity which are susceptible to translational landslides based on the slope of the terrain and the geological information available; (3) characterize the heavy rainfall hazard due to hurricanes (typhoon) as a set of collectively exhaustive and mutually exclusive stochastic events, that fully describe spatial distribution and annual frequency of occurrence (in accordance with storm category, storm position, distance between the eye of the storm and the site of interest, among others factors); (4) compute the ratio between the steady-state rainfall produced by a hurricane event affecting the tributary area of the slope under analysis, Qs, and the critical steady-state rainfall necessary to trigger slope instability, Qc, and finally; (5) carry out a probabilistic translational landslide hazard analysis to estimate the exceedance rate of a given ratio Qs/Qc. This method is applied to maps of Mexico for return periods of 50 and 150 years. The results shown in these maps are estimates of where the translational landslides may occur, and they should be useful to carry out local studies and to elaborate recommendations of site-specific hazard reduction plans as well as to calculate insurance rates. In addition to this, these results are useful for identifying actions of civil protection, regional and local risk management, and land use planning, as well as the promotion of more detailed vulnerability and risk studies on different scales. © 2014, Springer Science+Business Media Dordrecht. Source


Trademark
ERN Inc | Date: 2007-10-16

Games, namely, a card and dice game with a golf related theme.


Trademark
ERN Inc | Date: 2007-08-20

Childrens plush toys.


Trademark
ERN Inc | Date: 2009-01-06

Food cutting and carving boards.

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