... scientific observations devised by Jesuit superiors, see Agustín Udías, S.J., ‘Meteorology in the observatories of the ... Historicum Societatis Jesu, 65 (1996), 157–70; Agustín Udías, S.J., Searching the Heavens and the Earth. ... 258–86; Costa (note 11), 92–6; and Udías (note 6), 269–72. See also James Hennessey, ... 1381–2; Saderra Masó (note 24), 121–3; Udías (note 6), 148–50.36 These students were ... instruction in mathematics and civil engineering, among others. Udías (note 6), 158.43 Although officially associated with ...
Tópico(s): Maritime and Coastal Archaeology
2013 - Taylor & Francis | Annals of Science
... of the Iberian Peninsula in Early Catalogs Agustín Udías Agustín Udías Departamento de Geofísica y Meteorología, Facultad de C. ... GSW Google Scholar Author and Article Information Agustín Udías Departamento de Geofísica y Meteorología, Facultad de C. ... Icon Tools Get Permissions Search Site Citation Agustín Udías; Historical Earthquakes (before 1755) of the Iberian Peninsula ...
Tópico(s): Archaeological and Historical Studies
2015 - Seismological Society of America | Seismological Research Letters
Julian J. Bommer, Agustín Udías, José Cepeda, José Carlos Hasbun Hasbun, W. M. Salazar, A. Suárez, N. N. Ambraseys, Elisa Buforn, Jon de Cortina, Raúl Madariaga, P. Mendez, J. Mézcua, D. Papastamatiou,
... by this author on: GSW Google Scholar A. Udías; A. Udías Universidad Complutense de Madrid Departamento de Geofisica 28040 ... bommer@ic.ac.uk (J.J.B.) A. Udías 2Universidad Complutense, Madrid, Spain. Universidad Complutense de Madrid ... Permissions Search Site Citation J.J. Bommer, A. Udías, J.M. Cepeda, J.C. Hasbun, W.M. ...
Tópico(s): Geological and Tectonic Studies in Latin America
1997 - Seismological Society of America | Seismological Research Letters
Diego F. Muñoz, Agustín Udías,
... by this author on: GSW Google Scholar A. Udias A. Udias Catedra de Geofisica Universidad ComplutenseMadrid, Spain Search for ... Muñoz Catedra de Geofisica Universidad ComplutenseMadrid, Spain A. Udias Catedra de Geofisica Universidad ComplutenseMadrid, Spain Publisher: Seismological ... Get Permissions Search Site Citation D. Muñoz, A. Udias; Historical development of Spain's catalogs of earthquakes. ...
Tópico(s): Archaeological and Historical Studies
1982 - Seismological Society of America | Bulletin of the Seismological Society of America
Elisa Buforn, Agustín Udías, J. Mézcua, Raúl Madariaga,
... by this author on: GSW Google Scholar A. Udías; A. Udías Departmento de Geofísica Universidad ComplutenseMadrid, Spain Search for ... Get Permissions Search Site Citation E. Buforn, A. Udías, J. Mézcua, R. Madariaga; A deep earthquake under ...
Tópico(s): Geological and Geochemical Analysis
1991 - Seismological Society of America | Bulletin of the Seismological Society of America
Agustín Udías, William Stauder,
... 01, 1996 The Jesuit Contribution to Seismology Agustin Udias; Agustin Udias Geophysics Department Physical Sciences Faculty Universidad Complutense 2804 ... Icon Tools Get Permissions Search Site Citation Agustin Udias, William Stauder; The Jesuit Contribution to Seismology. Seismological ...
Tópico(s): earthquake and tectonic studies
1996 - Seismological Society of America | Seismological Research Letters
... 978-3-319-98189-5_3David Oldroyd, Agustín Udías Development of seismology in Spain in the context ... doi.org/10.17704/eshi.32.2.f1168212m214l532Agustín Udías Earthquakes as God's punishment in 17th- and ... 10.1144/GSL.SP.2001.190.01.03Agustín Udías, Alfonso López Arroyo The Lisbon Earthquake of 1755 ...
Tópico(s): Earthquake Detection and Analysis
1971 - University of Chicago Press | Isis
Agustín Udías, William Stauder,
... focal mechanism using S-wave data developed by Udias (1964) has been applied to 34 earthquakes of ...
Tópico(s): Geophysics and Sensor Technology
1964 - Seismological Society of America | Bulletin of the Seismological Society of America
William Stauder, Agustín Udías,
Abstract The polarization of the S wave at stations distributed azimuthally about the source is examined for each of twenty-five Aleutian Island earthquakes. A combination of data from the first motion of P and from the polarization of S is then used to study the focal mechanisms of the earthquakes. This combination of P and S wave data is found to make possible a good determination of the focal mechanism in cases where data from the first motion of P alone do not suffice. The earthquakes are divided ...
Tópico(s): earthquake and tectonic studies
1963 - Seismological Society of America | Bulletin of the Seismological Society of America
abstract In this paper a numerical approach to the determination of focal mechanisms based on the observation of the polarization of the S wave at N stations is presented. Least-square methods are developed for the determination of the orientation of the single and double couple sources. The methods allow a statistical evaluation of the data and of the accuracy of the solutions.
Tópico(s): Geotechnical and Geomechanical Engineering
1964 - Seismological Society of America | Bulletin of the Seismological Society of America
Abstract The earthquake sequences connected with the earthquakes of August 31 and September 14, 1963 in the Salinas-Watsonville region of California are here studied with reference to the background seismic activity. A very favorable distribution of permanent and mobile stations in this area permits the analysis to include earthquakes of small magnitudes. The mechanism of the larger aftershocks of both sequences is found to be similar to the mechanism of the main shock of September 14, 1963. The ...
Tópico(s): Seismology and Earthquake Studies
1965 - Seismological Society of America | Bulletin of the Seismological Society of America
... using S polarization angles published by Stauder and Udias (1963). All five earthquakes are the double dipole ...
Tópico(s): Earthquake Detection and Analysis
1967 - Seismological Society of America | Bulletin of the Seismological Society of America
Abstract A group of 23 earthquakes in the southern coast of the Iberian Peninsula from 1962 to 1964 are studied in order to determine the characteristics of the regional stresses. The largest of these earthquakes which occurred in March 15, 1964, with magnitude M = 7.1, has been used in the determination of the focal mechanism using P- and S-wave data. For this analysis a new computer program was used which finds a solution for the orientation of a point source based on the polarization of the S-wave ...
Tópico(s): earthquake and tectonic studies
1967 - Elsevier BV | Tectonophysics
Agustín Udías, A. López Arroyo,
The mechanism of the Spanish earthquake of March 15, 1964 has been investigated by means of body and surface waves. The double-couple source orientation obtained from the body-wave analysis agrees with the Rayleigh waves radiation pattern which selects the plane of faulting as that striking N 65°E and dipping 80° NE. This direction agrees with the strike of the Guadalquivir fault and with that of the faults transverse to the Mid-Atlantic Ridge. The dimension of the fault obtained from the directivity ...
Tópico(s): Geophysics and Sensor Technology
1970 - Elsevier BV | Tectonophysics
Agustín Udías, Dieter Baumann,
abstract A computer program has been developed to find the orientation of a double couple source model for the mechanism of an earthquake which best satisfies the data from P and S waves. The relationship between the two axes of the solution given by the equations for the polarization angle of S is used in order to rapidly find the orientation of the source model for which a total error value involving the error of S and P data is a minimum. The program gives best results for data from homogeneous ...
Tópico(s): Seismic Imaging and Inversion Techniques
1969 - Seismological Society of America | Bulletin of the Seismological Society of America
A generalized form of the directivity function has been used to determine the length and the rupture velocity of four earthquakes with known vertical strike slip faulting. For body wave magnitudes between 5.7 and 7.0, the lengths vary from 18 to 35 km with a rupture velocity of 1.5 kms−1. Seismic moments have been determined from the spectral amplitude densities and the theoretical response to a point source model. From these values, stress drops of 2 to 30 bars and average dislocations of 4 to ...
Tópico(s): Seismic Waves and Analysis
1971 - Oxford University Press | Geophysical Journal International
Agustín Udías, A. López Arroyo,
Tópico(s): Geological and Tectonic Studies in Latin America
1972 - Springer Nature | Nature Physical Science
A. López Arroyo, Agustín Udías,
Abstract The earthquake of February 28, 1969, which occurred about 500 km west of the Strait of Gibraltar, was felt over the entire Iberian Peninsula, in a wide region of Morocco, and south to the Canary Islands. It had a long sequence of aftershocks continuing for at least 10 months, but, nevertheless, most of the energy seems to have been liberated in the main shock of which the mb was 7.4. The source mechanism solution indicates a fault plane striking N 67°W and dipping 68°SW, with motion principally ...
Tópico(s): earthquake and tectonic studies
1972 - Seismological Society of America | Bulletin of the Seismological Society of America
Abstract Three series of aftershocks occurred in the region near Hollister, less than 15 km from the San Andreas Geophysical Observatory in 1968, 1970, and 1971 following shocks of magnitudes 2.3, 3.2, and 4.0, respectively. The high-gain system operating at SAO permitted a full study of these series for events as small as magnitude -0.7. The distribution of time intervals between consecutive shocks and magnitudes show certain definite differences in the time, space, and magnitude structure of the ...
Tópico(s): Seismology and Earthquake Studies
1977 - Seismological Society of America | Bulletin of the Seismological Society of America
Agustín Udías, A. López Arroyo, J. Mézcua,
Tópico(s): Geological and Tectonic Studies in Latin America
1976 - Elsevier BV | Tectonophysics
Abstract Microearthquake activity during the 4-year interval 1968 to 1971 in a region of 25 km radius, centered on the San Andreas fault near Hollister, has been monitored by means of high-gain high-frequency seismographs which allow detection of events as small as magnitude zero within the region. The distribution of the 4764 microearthquakes shows a high degree of clustering. The series of time intervals between consecutive shocks can be described approximately by a gamma distribution whose shape ...
Tópico(s): Seismology and Earthquake Studies
1975 - Seismological Society of America | Bulletin of the Seismological Society of America
David R. Brillinger, Agustín Udías, Bruce A. Bolt,
abstract The increase in the number of determinations of fault-plane solutions and their use for inferences on regional and local tectonics and stress fields makes it advisable to treat them in a standard way in groups on a regional basis. Probability models for joint group estimation of the shear dislocations, involving data from I earthquakes and J observations of the same region, are presented. The general model gives the probability πij of reading a compression (Yij = 1) for the P wave from event ...
Tópico(s): Soil Geostatistics and Mapping
1980 - Seismological Society of America | Bulletin of the Seismological Society of America
Agustín Udías, Diego F. Muñoz,
Data concerning this earthquake and the seismicity of the surrounding area have been examined. Large historical earthquakes before 1884 show that destructive shocks in the area have a recurrence period of about two hundred years. Recent seismic activity has been high from 1910 to 1955 and lower thereafter. Total number of casualties for the 1884 earthquake is estimated at 745 dead and 1475 wounded. Damage to buildings extended to 4399 houses totally destroyed and 6316 partially damaged. A new intensity ...
Tópico(s): Earthquake Detection and Analysis
1979 - Elsevier BV | Tectonophysics
Tópico(s): High-pressure geophysics and materials
1982 - American Geophysical Union | Geodynamics series/Geodynamic series
Agustín Udías, Elisa Buforn, David R. Brillinger, Bruce A. Bolt,
Tópico(s): Earthquake Detection and Analysis
1982 - Elsevier BV | Physics of The Earth and Planetary Interiors
E. Banda, Agustín Udías, St. Mueller, J. Mézcua, M. Boloix, J. Gallart, Alfredo Aparicio,
Major tectonic units of Spain have been investigated by deep seismic sounding experiments since 1974 to determine crustal structures and to delineate their differences. These areas are the central part of the Hercynian Meseta, and the Alpine chains: the Betic Cordillera in the south, including the Balearic promontory and the Alboran Sea, and the Pyrenees in the north. The main features of the crust and the upper mantle along a NNE-SSW cross-section from the Pyrenees to the Alboran Sea are described. ...
Tópico(s): Geological and Tectonic Studies in Latin America
1983 - Elsevier BV | Physics of The Earth and Planetary Interiors
Produção Nacional
Revisado por pares
Mary Lou Zoback, Mark D. Zoback, J Adams, Marcelo Assumpção, Sebastian Bell, Eric Bergman, Peter Blümling, N. R. Brereton, D. Denham, Jian Ding, Karl Fuchs, N.C. Gay, Søren Gregersen, Harsh K. Gupta, А. Д. Гвишиани, Klaus Jacob, Ruediger Klein, P. Knöll, Marian Magee, J. L. Mercier, Birgit Müller, C. Paquin, Kusala Rajendran, Ove Stephansson, Gerardo Suárez, Max Suter, Agustín Udías, Zhao Xu, Mikhail Zhizhin,
Tópico(s): Geological and Geochemical Analysis
1989 - Nature Portfolio | Nature
F. A. Nava, F. J. Núñez-Cornũ, Diego Córdoba, M. Mena, Jörg Ansorge, José A. González, M. Rodríguez, E. Banda, St. Mueller, Agustín Udías, Maritza Roxana García-García, G. Calderón,
Deep seismic profiling was carried out in south and central Oaxaca as a multinational (Mexico, Spain and Switzerland) project. Sixteen sea-bottom explosions, ranging from 20 to 1000 kg were recorded by thirty portable instruments along three profiles, two along the coast and one going inland in an approximate N-S direction. Gravity surveys were carried out over the seismic profile lines, and the resulting Bouguer anomalies are interpreted together with the seismic data. Preliminary results indicate ...
Tópico(s): Geological and Tectonic Studies in Latin America
1988 - Elsevier BV | Tectonophysics
Elisa Buforn, Agustín Udías, J. Mézcua,
Abstract Recent improvements in regional seismological networks allow a better definition of the seismicity and the determination of focal mechanisms in south Spain. This region is part of the lithospheric plate boundary between Africa and Eurasia and shows a continuous seismic activity of moderate magnitude ( M h h ≈ 650 km) earthquakes also occurring in the region. Eight fault-plane solutions have been determined that can be related to the tectonics of the area. The solutions for the shallow shocks ...
Tópico(s): Geological and Geochemical Analysis
1988 - Seismological Society of America | Bulletin of the Seismological Society of America
Elisa Buforn, Agustín Udías, M.A. Colombás,
A study and partial revision of the seismicity and source mechanisms of earthquakes are presented for the oceanic plate boundary of Eurasia and Africa from the Azores islands to the Strait of Gibraltar. Focal mechanisms of 36 earthquakes, wave-form modelling of 4 and seismic moments and dimensions of 28, have been calculated. These results indicate that the boundary is divided into three sections with different characteristics: the Azores, the Central section and the East section. The Azores section ...
Tópico(s): Geological and Geochemical Analysis
1988 - Elsevier BV | Tectonophysics