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| HISTORIC SEISMIC ACTIVITY [see also history of earthquakes in Andalusia] |
- Study of seismic activity in Almería in medieval and modern times: 1518 (Vera), 1522 (Almería)
- Study of 1431 Granada earthquake, 1531 (Baza), 1884 (Alhama), 1670 (Málaga)
- Various degree and doctoral theses have been written on historical seismic activity
- Recovery of historical texts and documents
- Work is currently ongoing into seismic activity in the eleventh century
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| EARTHQUAKE PREVENTION |
SOME ACTIVITIES:
- Updating of macroseismic catalogues:
- Catalogue of Historical Earthquakes (210 BC to 1965)
- Macroseismic database (1966-2002)
- Analysis of building vulnerability
- Study of building damage
- Dissemination
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| SEISMIC ACTVITY AND SEISMOTECHTONICS |
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| SEISMIC ENGINEERING |
Scaling Law of Seismic Motion
The objective is to estimate the ground movement expected in terms of the distance and magnitude of the earthquake. It is a study of attenuation, duration and site effects. A seismic risk map will be prepared using these parameters.
This study will analyze some 2000 local and regional earthquakes recorded by the Andalusia network with short period and broadband seismographs.
Numerical simulation of wave propagation
Propagation of seismic waves in geological surface structures (sedimentary basins, mountains, valleys, etc.) with numerical and analytical techniques,
- Models with 1D, 2D and 3D geometry
- Analysis of frequency (resonance phenomena) and time (synthetic seismograms)domains
- Incidence of P, S and Rayleigh waves
- Incidence of waves from seismic sources nearby constructed numerically
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3D simulation of wave propagation in the Zafarraya Basin |
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Site effects (micro-tremors) |
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| VOLCANIC SEISMICITY |
Recording and analysis of seismic activity associated with volcanic regions and its relationship with the volcano’s dynamics and structure.
Some of the regions studied:
- Deception Island, Antarctica
- Teide volcano, Spain
- Stromboli volcano, Italy
- Kilauea, Hawaii, USA
- Mount Etna, Italy
- Mount Vesuvius, Italy
- Campi Flegrei, Italy
- Colima volcano, Mexico
DYNAMICS OF THE SEISMIC-VOLCANIC SOURCE
- Determining the mechanisms responsible for seismic-volcanic signals
- Application of source models and discriminating the role played by fluids in these mechanisms
- Geographical boundaries of the seismic-volcanic regions
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A series of volcanic-tectonic earthquakes on Deception Island have been identified and followed in both space and time. The occurrence of the series has been related with deep magmatic processes. |
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The effects of speed tests in heterogeneous structures have been interpreted to be responsible for distortions in the seismic wave field. |
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| SEISMIC ATTENUATION |
Study of the mechanisms causing the phenomenon of seismic attenuation.
Separation of the effects if intrinsic attenuation from those caused by attenuation by scattering.
Study of the attenuative structure of a zone using tomographic inversion. Some of the regions studied:
South of the Iberian Peninsula; Anatolia Peninsula, Turkey; Apennines, Italy; Central Andes, Chile-Argentina;
Campi Flegrei and Etna, Italy; Deception Island, Antarctica.
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The attenuation of the coda waves has been determined in terms of the time lapse frequency for different tectonic and volcanic regions. A strong Q dependency has been found in relation to these two variables in all of the regions studied. |
BODY WAVES, P and S
Internal waves have been analyzed using different methods, such as: |
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PULSE BROADENING |
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CODA NORMALIZATION |
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SPECTRAL METHODS |
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