A5037538911- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Archaeological and Historical Studies
- Geological and Tectonic Studies in Latin America
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Geophysics and Sensor Technology
- Seismic Imaging and Inversion Techniques
- Historical Studies in Science
- Geotechnical and Geomechanical Engineering
- Geomagnetism and Paleomagnetism Studies
- History and Developments in Astronomy
- Geological Modeling and Analysis
- Seismic Performance and Analysis
- History of Science and Natural History
- Historical and Literary Studies
- Geochemistry and Geologic Mapping
- Diverse Historical and Scientific Studies
- Medieval Architecture and Archaeology
- Archaeological and Geological Studies
- Ultrasonics and Acoustic Wave Propagation
- Geophysics and Gravity Measurements
Universidad Complutense de Madrid
2014-2024
University of Oxford
2001
Universitat de Barcelona
1974-1977
Saint Louis University
1971
Instituto Geográfico Nacional
1970
Goethe University Frankfurt
1967
Earth Science Institute of the Slovak Academy of Sciences
1967
University of California, Berkeley
1965
UCLouvain Saint-Louis Brussels
1964
abstract The increase in the number of determinations fault-plane solutions and their use for inferences on regional local tectonics stress fields makes it advisable to treat them a standard way groups basis. Probability models joint group estimation shear dislocations, involving data from I earthquakes J observations same region, are presented. general model gives probability πij reading compression (Yij = 1) P wave event i at station j as Prob { Y 1 } γ + ( − 2 ) Φ ρ A where precision...
The four largest historical earthquakes of central Chile in the seventeenth and eighteenth centuries, 1647, 1657, 1730, 1751, are studied using contemporary documents available Archivo General de Indias Seville (Spain). These docu- ments provide detailed information about these earthquakes. This is first time have been used directly for a seismological study. 1647 earthquake practically destroyed city Santiago. Damage to cathedral main buildings given detail. 1657 near Concepcion produced...
Abstract Recent improvements in regional seismological networks allow a better definition of the seismicity and determination focal mechanisms south Spain. This region is part lithospheric plate boundary between Africa Eurasia shows continuous seismic activity moderate magnitude ( M h ≈ 650 km) earthquakes also occurring region. Eight fault-plane solutions have been determined that can be related to tectonics area. The for shallow shocks are compatible with stresses horizontal compressions...
Abstract Microearthquake activity during the 4-year interval 1968 to 1971 in a region of 25 km radius, centered on San Andreas fault near Hollister, has been monitored by means high-gain high-frequency seismographs which allow detection events as small magnitude zero within region. The distribution 4764 microearthquakes shows high degree clustering. series time intervals between consecutive shocks can be described approximately gamma whose shape parameters for different samples change from...
It has been shown that the Earth’s inner core an axisymmetric anisotropic structure with seismic waves traveling ∼3% faster along polar paths than equatorial directions. Hemispherical patterns of solid are rather complex, and commonly used hexagonal-close-packed iron phase might be insufficient to account for seismological observations. We show data we collected in good agreement presence two anisotropically specular east west hemispheres. The detected travel-time anomalies can only...
The deep earthquake ( h =650 km) that occurred on 11 April 2010 south of Granada, Spain, has been studied using the inversion body waves at teleseismic and regional distances. We have obtained a solution dip-slip motion either vertical plane or nearly horizontal with pressure axis dipping 45° to east. is chosen as rupture plane, propagating from east west basis directivity effects distances differences waveforms comparison these results focal mechanisms four other earthquakes in same area...
Abstract The earthquake of February 28, 1969, which occurred about 500 km west the Strait Gibraltar, was felt over entire Iberian Peninsula, in a wide region Morocco, and south to Canary Islands. It had long sequence aftershocks continuing for at least 10 months, but, nevertheless, most energy seems have been liberated main shock mb 7.4. source mechanism solution indicates fault plane striking N 67°W dipping 68°SW, with motion principally strike-slip type. There also is some overthrusting....
A generalized form of the directivity function has been used to determine length and rupture velocity four earthquakes with known vertical strike slip faulting. For body wave magnitudes between 5.7 7.0, lengths vary from 18 35 km a 1.5 kms−1. Seismic moments have determined spectral amplitude densities theoretical response point source model. From these values, stress drops 2 30 bars average dislocations 4 160cm derived. The products stresses acting at fault by seismic efficiency factor are...
Abstract The earthquake sequences connected with the earthquakes of August 31 and September 14, 1963 in Salinas-Watsonville region California are here studied reference to background seismic activity. A very favorable distribution permanent mobile stations this area permits analysis include small magnitudes. mechanism larger aftershocks both is found be similar main shock 1963. orientation principal axes stress derived from focal 14 earthquake, related strike San Andreas fault.