for Journals by Title or ISSN
for Articles by Keywords
help
  Subjects -> EARTH SCIENCES (Total: 654 journals)
    - EARTH SCIENCES (468 journals)
    - GEOLOGY (73 journals)
    - GEOPHYSICS (28 journals)
    - HYDROLOGY (22 journals)
    - OCEANOGRAPHY (63 journals)

EARTH SCIENCES (468 journals)                  1 2 3 | Last

Showing 1 - 200 of 371 Journals sorted alphabetically
Acta Geochimica     Hybrid Journal   (Followers: 3)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 1)
Acta Geodaetica et Geophysica Hungarica     Full-text available via subscription   (Followers: 2)
Acta Geophysica     Open Access   (Followers: 6)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3)
Advances in High Energy Physics     Open Access   (Followers: 20)
Advances In Physics     Hybrid Journal   (Followers: 19)
Aeolian Research     Hybrid Journal   (Followers: 5)
African Journal of Aquatic Science     Hybrid Journal   (Followers: 13)
Algological Studies     Full-text available via subscription   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 4)
AMBIO     Hybrid Journal   (Followers: 14)
Anales del Instituto de la Patagonia     Open Access   (Followers: 1)
Andean geology     Open Access   (Followers: 13)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Geographia, Geologia, Mineralogia et Petrographia     Open Access  
Annals of Geophysics     Open Access   (Followers: 13)
Annals of GIS     Hybrid Journal   (Followers: 21)
Annual Review of Marine Science     Full-text available via subscription   (Followers: 11)
Anthropocene     Hybrid Journal   (Followers: 3)
Anthropocene Review     Hybrid Journal   (Followers: 6)
Applied Clay Science     Hybrid Journal   (Followers: 4)
Applied Geochemistry     Hybrid Journal   (Followers: 12)
Applied Geomatics     Hybrid Journal   (Followers: 3)
Applied Geophysics     Hybrid Journal   (Followers: 7)
Applied Ocean Research     Hybrid Journal   (Followers: 5)
Applied Petrochemical Research     Open Access   (Followers: 2)
Aquatic Conservation Marine and Freshwater Ecosystems     Hybrid Journal   (Followers: 34)
Arctic Science     Open Access   (Followers: 6)
Arctic, Antarctic, and Alpine Research     Full-text available via subscription   (Followers: 9)
Artificial Satellites : The Journal of Space Research Centre of Polish Academy of Sciences     Open Access   (Followers: 18)
Asia-Pacific Journal of Atmospheric Sciences     Hybrid Journal   (Followers: 20)
Asian Journal of Earth Sciences     Open Access   (Followers: 20)
Asian Review of Environmental and Earth Sciences     Open Access   (Followers: 1)
Atlantic Geology : Journal of the Atlantic Geoscience Society / Atlantic Geology : revue de la Société Géoscientifique de l'Atlantique     Full-text available via subscription   (Followers: 10)
Atmosphere-Ocean     Full-text available via subscription   (Followers: 12)
Atmospheric and Climate Sciences     Open Access   (Followers: 28)
Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia     Hybrid Journal   (Followers: 11)
Boletim de Ciências Geodésicas     Open Access  
Boreas: An International Journal of Quaternary Research     Hybrid Journal   (Followers: 10)
Bragantia     Open Access   (Followers: 2)
Bulletin of Earthquake Engineering     Hybrid Journal   (Followers: 11)
Bulletin of Geosciences     Open Access   (Followers: 8)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Seismological Society of America     Full-text available via subscription   (Followers: 21)
Bulletin of Volcanology     Hybrid Journal   (Followers: 17)
Cadernos de Geociências     Open Access  
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 21)
Carbonates and Evaporites     Hybrid Journal   (Followers: 3)
CATENA     Hybrid Journal   (Followers: 5)
Chemical Geology     Hybrid Journal   (Followers: 18)
Chemie der Erde - Geochemistry     Hybrid Journal   (Followers: 4)
Chinese Geographical Science     Hybrid Journal   (Followers: 5)
Chinese Journal of Oceanology and Limnology     Hybrid Journal   (Followers: 4)
Ciencia del suelo     Open Access   (Followers: 2)
Ciencias Espaciales     Open Access  
Climate and Development     Hybrid Journal   (Followers: 12)
Coastal Management     Hybrid Journal   (Followers: 25)
Cogent Geoscience     Open Access  
Comptes Rendus Geoscience     Full-text available via subscription   (Followers: 8)
Computational Geosciences     Hybrid Journal   (Followers: 13)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 2)
Computers and Geotechnics     Hybrid Journal   (Followers: 10)
Contemporary Trends in Geoscience     Open Access   (Followers: 3)
Continental Shelf Research     Hybrid Journal   (Followers: 9)
Contributions to Mineralogy and Petrology     Hybrid Journal   (Followers: 10)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
Coral Reefs     Hybrid Journal   (Followers: 16)
Cretaceous Research     Hybrid Journal   (Followers: 6)
Cybergeo : European Journal of Geography     Open Access   (Followers: 5)
Depositional Record     Open Access  
Developments in Geotectonics     Full-text available via subscription   (Followers: 3)
Developments in Quaternary Science     Full-text available via subscription   (Followers: 3)
Développement durable et territoires     Open Access   (Followers: 3)
Diatom Research     Hybrid Journal   (Followers: 2)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamics of Atmospheres and Oceans     Hybrid Journal   (Followers: 11)
E&S Engineering and Science     Open Access  
E3S Web of Conferences     Open Access  
Earth and Planetary Science Letters     Hybrid Journal   (Followers: 112)
Earth and Space Science     Open Access   (Followers: 12)
Earth Interactions     Full-text available via subscription   (Followers: 11)
Earth Science Research     Open Access   (Followers: 5)
Earth Surface Dynamics (ESurf)     Open Access   (Followers: 4)
Earth Surface Processes and Landforms     Hybrid Journal   (Followers: 19)
Earth System Dynamics     Open Access   (Followers: 6)
Earth System Dynamics Discussions     Open Access   (Followers: 4)
Earth's Future     Open Access   (Followers: 1)
Earth, Planets and Space     Open Access   (Followers: 67)
Earthquake Engineering and Engineering Vibration     Hybrid Journal   (Followers: 8)
Earthquake Science     Hybrid Journal   (Followers: 11)
Earthquake Spectra     Full-text available via subscription   (Followers: 18)
Ecohydrology     Hybrid Journal   (Followers: 11)
Ecological Questions     Open Access   (Followers: 7)
Electromagnetics     Hybrid Journal   (Followers: 5)
Energy Efficiency     Hybrid Journal   (Followers: 11)
Energy Exploration & Exploitation     Hybrid Journal   (Followers: 4)
Environmental Earth Sciences     Hybrid Journal   (Followers: 24)
Environmental Geology     Hybrid Journal   (Followers: 20)
Environmental Geosciences     Full-text available via subscription   (Followers: 4)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
Erwerbs-Obstbau     Hybrid Journal  
Estuaries and Coasts     Hybrid Journal   (Followers: 18)
Estuarine, Coastal and Shelf Science     Hybrid Journal   (Followers: 33)
Estudios Geográficos     Open Access  
European Journal of Mineralogy     Full-text available via subscription   (Followers: 13)
European Journal of Remote Sensing     Open Access  
Exploration Geophysics     Hybrid Journal   (Followers: 4)
Facies     Hybrid Journal   (Followers: 9)
Fieldiana Life and Earth Sciences     Full-text available via subscription   (Followers: 1)
Física de la Tierra     Open Access  
Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica     Open Access  
Folia Quaternaria     Open Access  
Forestry Chronicle     Full-text available via subscription   (Followers: 10)
Frontiers in Earth Science     Open Access   (Followers: 5)
Frontiers in Geotechnical Engineering     Open Access   (Followers: 3)
Frontiers of Earth Science     Hybrid Journal   (Followers: 8)
Fundamental and Applied Limnology / Archiv für Hydrobiologie     Full-text available via subscription   (Followers: 4)
GEM - International Journal on Geomathematics     Hybrid Journal   (Followers: 1)
Geo-Marine Letters     Hybrid Journal   (Followers: 7)
Geoacta     Open Access   (Followers: 4)
Geobiology     Hybrid Journal   (Followers: 8)
Geocarto International     Hybrid Journal   (Followers: 22)
Geochemical Perspectives     Hybrid Journal  
Geochemistry : Exploration, Environment, Analysis     Hybrid Journal   (Followers: 7)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 26)
Geochimica et Cosmochimica Acta     Hybrid Journal   (Followers: 47)
Geochronometria     Hybrid Journal   (Followers: 3)
Geoderma Regional : The International Journal for Regional Soil Research     Full-text available via subscription   (Followers: 3)
Geodinamica Acta     Hybrid Journal   (Followers: 3)
Geodynamics & Tectonophysics     Open Access   (Followers: 1)
Geoenvironmental Disasters     Open Access   (Followers: 3)
Geofluids     Open Access   (Followers: 4)
Geoforum     Hybrid Journal   (Followers: 22)
Géographie physique et Quaternaire     Full-text available via subscription   (Followers: 1)
Geography and Natural Resources     Hybrid Journal   (Followers: 7)
Geoheritage     Hybrid Journal   (Followers: 1)
Geoinformatica Polonica : The Journal of Polish Academy of Arts and Sciences     Open Access  
Geoinformatics & Geostatistics     Hybrid Journal   (Followers: 9)
Geological Journal     Hybrid Journal   (Followers: 14)
Geology Today     Hybrid Journal   (Followers: 25)
Geology, Geophysics and Environment     Open Access   (Followers: 1)
Geomagnetism and Aeronomy     Hybrid Journal   (Followers: 3)
Geomatics, Natural Hazards and Risk     Hybrid Journal   (Followers: 9)
Geomechanics for Energy and the Environment     Full-text available via subscription   (Followers: 1)
GEOmedia     Open Access   (Followers: 1)
Geomorphology     Hybrid Journal   (Followers: 27)
Geophysical & Astrophysical Fluid Dynamics     Hybrid Journal   (Followers: 2)
Geophysical Journal International     Hybrid Journal   (Followers: 31)
Geophysical Prospecting     Hybrid Journal   (Followers: 7)
Geophysics     Full-text available via subscription   (Followers: 18)
GeoResJ     Hybrid Journal  
Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards     Hybrid Journal   (Followers: 8)
Geoscience Canada : Journal of the Geological Association of Canada / Geoscience Canada : journal de l'Association Géologique du Canada     Full-text available via subscription   (Followers: 3)
Geoscience Data Journal     Open Access   (Followers: 2)
Geoscience Frontiers     Open Access   (Followers: 9)
Geoscience Letters     Open Access   (Followers: 1)
Geoscience Records     Open Access  
Geosciences     Open Access   (Followers: 2)
Geosciences Journal     Hybrid Journal   (Followers: 10)
Geoscientific Instrumentation, Methods and Data Systems     Open Access   (Followers: 4)
Geoscientific Model Development     Open Access   (Followers: 2)
Geostandards and Geoanalytical Research     Hybrid Journal   (Followers: 2)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotectonic Research     Full-text available via subscription   (Followers: 5)
Geotectonics     Hybrid Journal   (Followers: 7)
GISAP : Earth and Space Sciences     Open Access   (Followers: 2)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Global and Planetary Change     Hybrid Journal   (Followers: 17)
Global Biogeochemical Cycles     Full-text available via subscription   (Followers: 15)
Gondwana Research     Hybrid Journal   (Followers: 7)
GPS Solutions     Hybrid Journal   (Followers: 17)
Grassland Science     Hybrid Journal  
Ground Water     Hybrid Journal   (Followers: 34)
Ground Water Monitoring & Remediation     Hybrid Journal   (Followers: 19)
Groundwater for Sustainable Development     Full-text available via subscription   (Followers: 2)
Helgoland Marine Research     Open Access   (Followers: 3)
History of Geo- and Space Sciences     Open Access   (Followers: 4)
Hydrobiologia     Hybrid Journal   (Followers: 18)
Hydrogeology Journal     Hybrid Journal   (Followers: 18)
Hydrological Processes     Hybrid Journal   (Followers: 27)
Hydrology and Earth System Sciences     Open Access   (Followers: 28)
ICES Journal of Marine Science: Journal du Conseil     Hybrid Journal   (Followers: 54)
IEEE Journal of Oceanic Engineering     Hybrid Journal   (Followers: 12)
Indian Geotechnical Journal     Hybrid Journal   (Followers: 4)
Indonesian Journal on Geoscience     Open Access   (Followers: 2)
Interdisciplinary Environmental Review     Hybrid Journal   (Followers: 3)
International Geology Review     Hybrid Journal   (Followers: 14)
International Journal of Advanced Geosciences     Open Access  
International Journal of Advanced Remote Sensing and GIS     Open Access   (Followers: 35)
International Journal of Advancement in Earth and Enviromental Sciences     Open Access   (Followers: 3)
International Journal of Advancement in Remote Sensing, GIS, and Geography     Open Access   (Followers: 27)
International Journal of Applied Earth Observation and Geoinformation     Hybrid Journal   (Followers: 36)
International Journal of Coal Geology     Hybrid Journal   (Followers: 2)
International Journal of Disaster Risk Reduction     Hybrid Journal   (Followers: 15)
International Journal of Earth Sciences     Hybrid Journal   (Followers: 35)
International Journal of Earthquake and Impact Engineering     Hybrid Journal   (Followers: 2)
International Journal of Geo-Engineering     Open Access   (Followers: 2)

        1 2 3 | Last

Journal Cover Annals of Geophysics
  [SJR: 0.624]   [H-I: 35]   [13 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 1593-5213 - ISSN (Online) 2037-416X
   Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia Homepage  [1 journal]
  • A Combined Velocicity Field of the Mediterranean Region

    • Authors: Roberto Devoti, Nicola D'Agostino, Enrico Serpelloni, Grazia Pietrantonio, Federica Riguzzi, Antonio Avallone, Adriano Cavaliere, Daniele Cheloni, Giampaolo Cecere, Ciriaco D'Ambrosio, Luigi Franco, Giulio Selvaggi, Marianne Metois, Alessandra Esposito, Vincenzo Sepe, Alessandro Galvani, Marco Anzidei
      First page: 0215
      Abstract: We provide a new 3-D GPS velocity field solution of the Euro-Mediterranean area computed at the Centro Nazionale Terremoti (CNT) division of the Istituto Nazionale di Geofisica e Vulcanologia (INGV). The available raw GPS data since 1993, have been fully reprocessed by three different software and the final velocity field is obtained by combining three independent velocity solutions in a least squares sense. The input velocity solutions are treated as stochastic samples of the true velocity field by loosening the reference frame constraints in the associated variance-covariance matrix. The proposed approach allows for a fast combination of multi velocity solutions taking into account the full covariance, if available. The velocity map for the Euro-Mediterranean region will be updated and released regularly on the web portal of the National GPS Network (http://ring.gm.ingv.it). Here we show and discuss in detail the data analysis, combination scheme and results of the analysis procedure.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7059
      Issue No: Vol. 60, No. 2 (2017)
       
  • SEDA a software package for the Statistical Earthquake Data Analysis: a
           tutorial application to the 2009 L'Aquila and the 2012 Emilia (Italy)
           sequences

    • Authors: Anna Maria Lombardi
      First page: 0216
      Abstract: The main purpose of this paper is to provide a tutorial application of SEDAv1.0, the first version of a software package, recently designed for the statistical analysis of earthquake data. SEDAv1.0 consists of a user-friendly Matlab-based interface, to facilitate the interaction with the application, and of a computational core of Fortran codes, to guarantee fast running times.The main part of SEDAv1.0 is devoted to the ETAS modeling. For the first time, an almost complete set of consistent tools based on ETAS models is collected in a single, free software. Moreover, SEDA guarantees the research reproducibility, which is becoming an increasingly major concern among scientists. The peculiarities of some routines of SEDAv1.0 are discussed in this paper, by the application to two important recent seismic sequences occurred in Italy. Specifically, the paper illustrates how using SEDAv1.0, to estimate the completeness magnitude and the b-value, to set and test the ETAS model and, finally, to identify the earthquakes sequences, basing on causal connections.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7077
      Issue No: Vol. 60, No. 2 (2017)
       
  • Feasibility study for the macroseismic monitoring of the natural gas
           reservoir of "SANT'ALBERTO" (Po Plain, Italy)

    • Authors: Simona Carannante, Ezio D'Alema, Sara Lovati, Marco Massa, Paolo Augliera, Gianlorenzo Franceschina
      First page: 0217
      Abstract: In this paper we present a feasibility study for the surface seismic
      monitoring of the “Sant’Alberto” gas reservoir (Po Plain, Northern
      Italy). The project was commissioned to INGV in the framework
      of the activities planned by the oil & gas E&P company PoValley
      Energy (PVE), aiming to exploit the underground deposit.
      After estimating the ambient seismic noise of the area, we
      hypothesized a microseismic network composed of five stations
      installed in a 8.0x8.0 km2 area centered on the surface projection
      of the reservoir. Moreover, due to the high noise levels observed,
      we also considered the possible installation of a borehole station
      at 200 m depth. Detection and localization thresholds were
      estimated by comparing the power spectral density of
      hypothetical seismic sources located in the crustal volume
      surrounding the reservoir, with the mean power spectra of the
      ambient seismic noise observed (or hypothesized) at each
      station-site. Two crustal volumes for the earthquakes
      detection were considered: the inner domain of detection,
      DI (8.6x8.6x4.0 km3), within which we should ensure the
       highest network performance, and the extended domain of
      detection, DE (18.6x18.6x9.0 km3). Simulations show that: 1)
      five surface stations installed within the surface projection of
      DI ensure localization thresholds ranging between 0.7 and 0.8
      within DI; 2) the installation of the borehole station allows to
      improve the detection threshold everywhere within DI, and
       up to ML =-0.4 nearby the reservoir; and 3) localization
      thresholds obtained in the crustal volume included in DE,
      but not in DI, show values around ML = 1.0.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7111
      Issue No: Vol. 60, No. 2 (2017)
       
  • Global nonlinear optimization for the interpretation of source parameters
           

    • Authors: Arkoprovo Biswas, Mahesh Prasad Parija, Sushil Kumar
      First page: 0218
      Abstract: An efficient approach to estimate model parameters from total gradient of gravity and magnetic data based on Very Fast simulated Annealing (VFSA) has been presented. This is the first time of applying VFSA in interpreting total gradient of potential field data with a new formulation estimation caused due to isolated causative sources embedded in the subsurface. The model parameters interpreted here are the amplitude coefficient (k), exact origin of causative source (x0) depth (z0) and the shape factors (q). The results of VFSA optimization show that it can uniquely determine all the model parameters when shape factor is constrained. The model parameters estimated by the present method, mostly the shape and depth of the buried structures were found to be in excellent agreement with the actual parameters. The method has also the proficiency of evading highly noisy data points and improves the interpretation results. Study of histogram and cross-plot analysis also suggests the interpretation within the estimated uncertainty.  Inversion of noise-free and noisy synthetic data for single structures as well as field data demonstrates the efficacy of the approach. The technique has been warily and effectively applied to real data examples (Leona Anomaly, Senegal for gravity and Pima copper deposit, USA for magnetic) with the presence of ore bodies. The present method can be extremely applicable for mineral exploration or ore bodies of dyke-like structure embedded in the shallow and deeper subsurface. The computation time for the whole process is very short.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7129
      Issue No: Vol. 60, No. 2 (2017)
       
  • The Italian magnetic repeat station network: results from the 2012.5
           ‘Reduced Network’ completion

    • Authors: Guido Dominici, Antonio Meloni
      First page: 0219
      Abstract: In Italy INGV (Istituto Nazionale di Geofisica e Vulcanologia) has systematically undertaken the task of periodic making measurements of the Earth's magnetic field on a network of more than 110 points (repeat stations), with an average spacing around 55-60 km. Measurements are repeated regularly every 5 years and the last published data reports and magnetic maps, refer to 2010.0, available in Dominici et al, 2012. At that time the report referred to a survey of 131 repeat stations (including 2 observatories, 11 stations in Albania, 3 stations in Corsica and 1 in Malta) carried out between 2009 and 2010, also with the purpose of updating the national magnetic cartography. At the epoch 2012.5 a selection of stations, from the first order Italian Magnetic Network, selected on the basis of the lowest amplitude values of anomaly with respect to a 'normal' field, was repeated. The number of the selected stations amounts to 25, distributed according to an almost uniform national geographical coverage, with an average spacing around 100 km. Secular variation and analytical expressions, such as second order polynomials, in latitude and longitude for all field elements, were determined and coefficients were obtained for the spatial field variation and secular variation. We describe here the characteristics of this reduced network with the data reduction procedure, normal fields and maps, and compare the results with other magnetic field models.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7062
      Issue No: Vol. 60, No. 2 (2017)
       
  • A seismic ray-tracing method based on Fibonacci search

    • Authors: Luciano Emanuel Onnis, José Carcione
      First page: 0220
      Abstract: We design a fast ray tracing technique to simulate the response of seismic sources located at depth such as passive data due to fluid injection, hydraulic fracturing, volcanic tremors or earthquakes, with receivers located at the surface recording the displacement (and particle-velocity) field. The ray tracing is based on the Fibonacci search algorithm. We consider interfaces of arbitrary geometry and homogeneous layers defined by the seismic velocity, the quality factor and the mass density. Amplitude losses consider geometrical spreading, intrinsic attenuation (related to the quality factor) and transmission losses at the interfaces. The traces corresponding to time spikes are then convolved with a Ricker wavelet to obtain band-limited synthetic seismograms. We compare the results with full-wave seismograms computed with a direct algorithm based on the Fourier pseudospectral method. The ray tracing algorithm is much faster and from a practical point of view can be used as a forward modeling algorithm for the location of different sources of seismic energy.
      PubDate: 2017-05-02
      DOI: 10.4401/ag-7128
      Issue No: Vol. 60, No. 2 (2017)
       
  • An optimal geodetic dynamic reference frame realization for Greece:
           Methodology and application

    • Authors: Stylianos Bitharis, Dimitrios Ampatzidis, Christos Pikridas
      First page: 0221
      Abstract: On this study the theoretical and practical approach of an optimal geodetic reference
      frame realization is described in detail. The Hellenic area due to its strong geodynamic behavior
      creates a rather inhomogeneous velocity field. This issue plays a critical role in stable and longterm
      geodetic datum. The methodology of the Minimization of the Kinetic Energy Criterion
      (MKEC) is defined and analyzed on a permanent GNSS network consisting of 151 stations. The
      sites velocities values were estimated from seven years continuously data. The application
      formula shows that the kinematic energy is minimized more than 60 percent in two different
      approaches for the International Terrestrial Reference Frame and the European Terrestrial
      Reference System 1998 (ETRS89). In addition, the realization of the ETRS89 approach in Greece
      is not offering any significant advantage. However, we proposed a new strategy, which minimizes
      the total kinetic energy and it is found effective in local areas with strong geodynamic activity like
      the Greece case.
      PubDate: 2017-04-28
      DOI: 10.4401/ag-7292
      Issue No: Vol. 60, No. 2 (2017)
       
  • Relation of Mean Time Interval with Magnitude for Earthquakes in Northeast
           India and Its Surrounding Region

    • Authors: Sankar Kumar Nath, Arabind Kumar Yadav
      First page: 0223
      Abstract: Based on active tectonics, structural orientation, focal mechanism of earthquakes and seismicity level, Northeast India and its surrounding region has been divided into five seismogenic zones namely, the Eastern Himalaya as Zone 1, the Eastern Himalaya Syntaxis as Zone 2, the Shillong plateau and Mikir hill as Zone 3, the Naga-Disang as Zone 4 and the Eastern Boundary as Zone 5. In the present study we have proposed relation between earthquake mean time interval and magnitude for earthquakes in these five seismogenic zones. We model the variation of the mean time interval with four different distribution models viz. the Poisson’s, the Weibull’s, the log-Weibull and the lognormal distributions. The mean time interval is found to be following the log-normal model the most amongst the four models tested here. The coefficients of the relation between logarithm of mean time interval and magnitude as estimated from the complete catalog selected by two time windows exhibit mild differences limited to ± one standard deviation uncertainty in the coefficient and decreasing with an increase in the catalog time window length.
      PubDate: 2017-05-02
      DOI: 10.4401/ag-6978
      Issue No: Vol. 60, No. 2 (2017)
       
  • The palaeogeographic setting and the local environmental impact of the 130
           ka Falconiera tuff-cone eruption (Ustica island, Italy)

    • Authors: Sandro de Vita, Franco Foresta Martin
      First page: 0224
      Abstract: This research focuses on the effects of the last eruption occurred at Ustica, which formed the Falconiera tuff-cone at around 130 ka BP in the north-eastern tip of the island. This eruption was mainly explosive and phreatomagmatic, with the emplacement of a series of pyroclastic-surge beds that determined the formation of an asymmetric tuff cone. This is the most easily recognizable Ustica volcanic edifice, although its north-eastern sector has been partially dismantled by the erosion. A section of the feeding conduit is exposed northward, showing the solidified lavas that fed the latest stages of the eruption. These were characterized by the formation of an intracrateric lava lake and a Strombolian scoria-fallout deposit.The eruption occurred during the Upper Pleistocene Marine Isotopic Substage 5.5, a warm period characterized by a high sea-level stand (6±3 m above the present sea level in stable areas) and the diffusion in the Mediterranean sea of subtropical flora and fauna. This eruption slightly modified the Ustica morphology, but impacted on both marine and terrestrial environments, burying beach deposits rich of mollusk shells (i.e. Strombus bubonius, Conus testudinarius, Brachidontes puniceus), colonies of corals (Cladocora caespitosa) and subaerial plants (Chamaerops humilis). These organisms, found in some cases in their vital position, along with other lines of evidence, give information on the palaeogeography of this sector of the island at the time of the eruption, and on the local impact of this event on the environment.
      PubDate: 2017-04-24
      DOI: 10.4401/ag-7113
      Issue No: Vol. 60, No. 2 (2017)
       
  • Source parameters of the earthquake sequence that occurred close to the
           BURAR array (Romania) between 24 June and 1 July 2011

    • Authors: Emilia Popescu, Anica Otilia Placinta, Mircea Radulian, Felix Borleanu, Mihail Diaconecu, Mihaela Popa
      First page: 0225
      Abstract: The seismic activity recorded in the Eastern Carpathians is poor and scarce (a few hundreds of small-to-moderate earthquakes in the Romanian catalogue over the last century). The installation in 2002 of the high-performance Bucovina (BURAR) array in the Eastern Carpathians area contributed to a significant growth of the capacity to monitor local seismicity. As a consequence, the earthquake sequence occurred between 24 June and 1 July 2011 close to the BURAR array is the best seismic data set ever recorded for this area. The location of the events using all the available data provided by the real-time seismic network of the National Institute for Earth Physics shows a NE-SW alignment along the western edge of Avrămeşti - Suceava fault. This fault is crossing the Carpathian Foredeep underthrusting the foreland units to the orogeny area. The distribution of the first P-wave polarities is fitting the geometry of this fault, indicating predominant strike-slip faulting, with right-lateral movement. The compression axis oriented E-W is in agreement with the stress field characterizing the region. We applied spectral ratios and empirical Green’s function methods to estimate the source parameters (corner frequency, seismic moment, source duration, rise time) for the events with moment magnitudes higher than 2.5 recorded within this sequence. The results show a simple fracture model for the main shock of 24 June 2011 and a constant stress drop scaling. Source parameter scaling relationships fit well the results obtained for other regions along the South-Eastern Carpathians and those which are typical for intra-continental areas.
      PubDate: 2017-04-28
      DOI: 10.4401/ag-7285
      Issue No: Vol. 60, No. 2 (2017)
       
  • Airborne Radio Echo Sounding (RES) measures on Alpine Glaciers to evaluate
           ice thickness and bedrock geometry: preliminary results from pilot tests
           performed in the Ortles Cevedale Group (Italian Alps).

    • Authors: Stefano Urbini, Achille Zirizzotti, James Baskaradas, Ignazio Ezio Tabacco, Lili Cafarella, Antonella Senese, Claudio Smiraglia, Guglielmina Diolaiuti
      First page: 0226
      Abstract: Radar exploration supports glaciological studies playing several roles in ice exploration such as determining ice thickness and volume, describing ice and snow internal layering and characterizing crevassed areas. The method, widely used with full success on Polar areas, encounters more difficulties when applied to survey mountain glaciers like the Alpine and Himalayan ones. Among them, these difficulties can be addressed to the different physical characteristics of temperate ice and to logistic difficulties related to performing field operations at high elevations on areas where crevasses, seracs and ice-falls are present, making more complicate and complex the glacier surface.In the framework of the SHARE-PAPRIKA and the SHARE-STELVIO Projects, we performed some preliminary measurements on Careser, Sforzellina and Forni glaciers (Ortles-Cevedale Group, Italy), to evaluate efficiency and applicability of a Radio Echo Sounding (RES) instrument specifically designed, developed and modified by the INGV (Istituto Nazionale di Geofisica e Vulcanologia) laboratories. This paper reports the results we obtained investigating each glacier, the hampering factors and the cost to benefit ratio introduced by the airborne survey.
      PubDate: 2017-04-28
      DOI: 10.4401/ag-7122
      Issue No: Vol. 60, No. 2 (2017)
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs
Your IP address: 54.81.113.71
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2016