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Sep 30, 2021Open Access
On August 8, 2017, Jiuzhaigou earthquake caused a large number of geological disasters in Jiuzhaigou scenic area, and many landscapes were seriously damaged. Sentinel-1A data from July 30, 2017 to January 28, 2020 are selected as the data source. SBAS-InSAR technology is used to obtain the settlement rate changes of Jiuzhaigou earthquake damaged core landscape Panda sea, Spark sea and Nuorilang waterfall, and dynamically monitor the restoration and conservation results of Jiuzhaigou. The results...
Jun 09, 2021Open Access
In this paper we consider the different locations of Zhejiang (ZJ) provincial area including Hangzhou Bay (HZB), Ningbo (NB), Zhoushan (ZS), Taizhou (TZ) and Wenzhou (WZ) subareas to find out the sea level (SL) variations. Sea Surface Height Relative to Geoid over these areas has been obtained from the satellite altimetry data produced routinely by the European Centre for Medium-Range Weather Forecasting (ECMWF) and Archiving, Validation and Interpretation of Satellite Oceanographic (AVISO) data...
Aug 24, 2020Open Access
This paper presents the analysis of temporal variations of the geomagnetic field in the municipality of Macaé, Brazil. Current and historical magnetic field from the IGRF (International Geomagnetic Reference Field) and Gufm1 models were used to construct two-dimensional maps from 1590 to 2019. Analysis of the maps revealed that there was a large decrease in total magnetic field magnitude from around 48,000 nT in 1590 to 23,000 nT in 2019, i.e., a decrease of more than 50%. This decrease was inte...
May 27, 2020Open Access
In this paper we consider the Zhejiang (ZJ) provincial coastal area to find the sea level (SL) variations. Sea Surface Height Relative to Geoid over these areas has been obtained from the satellite altimetry data produced routinely by the European Centre for Medium-Range Weather Forecasting (ECMWF) and Archiving, Validation and Interpretation of Satellite Oceanographic (AVISO) data. Monthly, seasonal and interannual variations of SL over ZJ have been presented ...
May 15, 2020Open Access
This work presents the magnetometric method application in the Carajás Mineral Province, located in the south of the Pará state, Brazil. This is a region rich in iron ore in hematite form distributed in the Itacaiúnas Belt. The available gross magnetometric data were corrected and subtracted from the IGRF (International Geomagnetic Reference Field). Subsequently, magnetic anomaly, vertical derivative, horizontal derivatives and analytical signal maps were made that allowed to identify the main f...
Oct 10, 2019Open Access
In this study, a certain zone of Libra oil field of the pre-salt region was se-lected to be analyzed for didactic purposes in order to simulate AVO re-sponses. The region was modeled using seismic data, setting up a typical oil system with source rock (shale), reservoir rock (sandstone), and seal rock (salt). Thus, a set of parameters such as seismic wave velocity, density and Poisson’s ratio for the studied zone w ...
Jul 30, 2019Open Access
This work presents the geomagnetic characterization of the municipality of Macaé, Brazil. Data from IGRF12 (twelfth edition of International Geomag-netic Reference Field) were used. Through the data collected in a regular grid of 0.1 degrees of the components, north, east and vertical were generated maps of components, inclination, declination, horizontal component and geomagnetic total field. The results showed important relative ...
Apr 29, 2019Open Access
This work presents the analysis of magnetometric data of an aerial survey conducted in the Rio do Peixe Sedimentary Basin, which is a promising oil producing region in the state of Paraíba, Brazil. The collected aeromagne-tometric data allowed the preparation of maps regarding magnetic anomaly, horizontal and vertical derivatives, analytical signal and Euler Decon-volution that were compared w ...
May 26, 2016Open Access
The Island of Tubuai (Australs Archipelago, South Pacific) was directly
hit by the tropical cyclone (TC) Oli on February 5th, 2010. For the
first time on an island in French Polynesia, we have been able to monitor the
progress and the impact of TC Oli as revealed by the meteorological, GPS and
sea level pressure data. TC Oli is one of the most intense c ...
Apr 24, 2015Open Access
The seismic risk determination for any country is a vital tool in the process of physical planning, construction and reduction of disasters caused by earthquakes. In recent years, there have been several studies on the subject, however, different methodologies could be improved from the design of a set of basic criteria, which using the advantages of Geographic Information Systems (GIS), could help to establish greater clarity in the seismic risk determining. To meet this goal, in this study, th...
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