GeoSAR is a program to develop a dual frequency airborne radar interferometric mapping instrument designed to meet the mapping needs of a variety of users in government and private industry. Program participants are the Jet Propulsion Laboratory (JPL), Calgis, Inc., and the California Department of Conservation with funding provided initially by DARPA and currently by the National Imagery and M...

A probabilistic method was developed for ranking Canadian hydropower dams according to their seismic vulnerability. The method is based on the probabilistic seismic hazard at the dam location, the seismic fragility of the dam, and the construction date of the dam. The seismic hazard is represented by the peak ground acceleration of seismic motions at the dam location for a specified probability...

Ground motion estimation for a site (34.01 o N, 71.45 o E) located in the Peshawar in terms of Peak Ground Acceleration (PGA) values is conducted. It is carried out with deterministic seismic hazard analysis approach using faults sources within a radius of one hundred kilometers around site. The results of this study indicate that the Main Boundary Thrust located at a distance of twenty nine (2...

The February 21, 2008, Wells earthquake (MW=6.0) occurred in a region of northeastern Nevada where the seismicity has historically been low relative to western Nevada. In a region of area of approximately10 5 km 2 of northeastern Nevada, based rates of smaller earthquakes in the region prior to 2008, earthquakes of MW=6.0 or larger are expected with a rate of about 0.01 per year. The probabilit...

Fragility curves represent the probabilities that structural damages, under various levels of seismic excitation, will exceed the specified damage states by means of earthquake intensity damage relations. Conceptual aspects related to seismic vulnerability, damage and risk evaluation are discussed first, together with a short review of the most widely used possibilities for the seismic evaluati...

Three objectives are set for this year: (1) The development and implementation of probabilistic seismic hazard model for multi-sites with consideration of spatial variation of ground motions; (2) The refinement of the methodology to calculate seismic fragility of water supply systems based on a combination of Monte Carlo simulation and hydraulic network analysis for damaged systems; and (3) The...

References l.html#ref-list-1 http://rsta.royalsocietypublishing.org/content/364/1845/1965.ful This article cites 25 articles, 5 of which can be accessed free Rapid response 1845/1965 http://rsta.royalsocietypublishing.org/letters/submit/roypta;364/ Respond to this article Email alerting service here in the box at the top right-hand corner of the article or click Receive free email alerts when n...

the territory of serbia is vulnerable to various types of natural hazards and the risk is not equal across the entire territory; it varies depending on the type of hazard and the expected potential for damage. the first aim of this research was to determine the geographical distributions of the major types of natural hazards. seismic hazards, landslides, rock falls, floods, torrential floods...

The great rocking of building structures and the occurrence liquefaction in water-saturated soil on river banks are generally caused by earthquake shaking. waves generated main cause In order to show effect ground motion shaking response processes, it is necessary analyze structure as well time history artificial motions. An for analysis can be developed based spectral matching target spectrum ...

Earthquake Alarms Systems, ElarmS, is a methodology for providing warning of forthcoming ground shaking during earthquakes. The approach uses a network of seismic instruments to detect the first-arriving energy at the surface, the P-waves, and translate the information contained in these low amplitude waves into a prediction of the peak ground shaking that follows. The instruments closest to th...