Results of an archaeomagnetic study of two excavation field seasons at the Xalla and Teopancazco residential areas of the ancient Prehispanic city of Teotihuacan, Central Mexico are reported. One-hundred and fifty three oriented samples of lime-plasters from the two archaeological sites were collected for the study. NRM directions are reasonably well grouped. Alternating field demagnetization shows single or two-component magnetizations. Rock magnetic measurements point to fine-grained titanomagnetites with pseudo-single domain behaviour. Characteristic site mean directions from both sites are correlated to the available palaeosecular variation curve for Mesoamerica. The mean directions obtained from Xalla site point to average dates of 550 AD±25 years that matches with the documented 'Big Fire' of Teotihuacan (AD 575). Two consecutive construction levels at Teopancazco were estimated as AD 250-350 and AD 350-425 respectively.

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A morphotectonic interpretation of the relief of the Iberian Peninsula (IP) is presented based on an analysis of its gross forms. Several geological-geophysical and geomorphological methods were used in order to build up a morphostructural sketch. Three main categories were established using the approach of RANTSMAN (1979): Territorial Units (1-megablock, 9-macroblocks, 34-mesoblocks, 1.374-blocks and 2.523-microblocks); Morphostructural Alignments (2-first, 8-second, 20-third and 1-fourth rank; and 43 knots between Morphostructural Alignments (second-fourth rank). The main seismic activity is concentrated on the first-and second-rank lineaments, and some important epicenters are located near the lineament intersections. The origin of the earthquakes in the vicinity of such knots can be explained by the forcing/pushing of macroblocks westwards. The existence of earthquakes along the lineaments may be explained by tension. From the present study it appears that earthquake occurrence in the IP is due principally to stress concentrations around morphotectonic zones. A seismotectonic interpretation of the IP is also presented. On this map three zones are distinguished (A, B, C), each of them with a different active level and dimensions.

The first catalogue of active regional faults of Cuba is presented. The seismotectonic map of Cuba is a base for studying the seismicity in this region. Of the 30 faults studied, only twelve are active. The main seismotectonic structure is the Bartlett-Cayman fault system, which borders the eastern and southeastern seismotectonic units in this region. Approximately 70% of Cuban seismicity is concentrated here. The Cauto-Nipe, Cochinos and Nortecubana faults border other seismotectonic units. The Nortecubana fault is the only one associated with a tsunami. All the faults are segmented. The faults described are related to the current tectonic stress regime of the Northern Caribbean. All the available information (maps, sections and profiles, photos, geological and neotectonic data on seismicity and focal mechanisms) is supported by a GIS.

tenido tres tsunamis. Uno de ellos [local] ocurrió en la zona centro-septentrional [1931.10.01, falla Nortecubana], el otro fue un teletsunami [1755.11.01, del suroeste de la Península Ibérica] que afectó a la bahía de Santiago de Cuba, y el tercero aconteció en 1867.11.18 [M=7,5], por la fuente regional de Islas Vírgenes, que produjo oleaje en la región oriental cubana. Este tsunami se originó al nordeste de Puerto Rico que en 1918.10.11 produjo, con otro terremoto de igual magnitud y en unas coordenadas similares, un tsunami que no afectó a Cuba. Las informaciones sobre la influencia del tsunami regional de 1946.08.08 del noreste de la República Dominicana [Matanzas] en Cuba Occidental-Norte [playas Guanabo-Baracoa] son contrarias a lo esperado con la propagación de las ondas. El evento local de 1939.08.15 que se atribuye a Cuba Centro-Septentrional [Cayo Francés con M=8.1] no se corresponde en lo absoluto con la magnitud máxima de los terremotos de esta región y la potencialidad de la falla Nortecubana. Los tsunamis atribuidos a eventos como los de 1766.06.11 y 1932.02.03 en la bahía de Santiago de Cuba no están recogidos en los documentos originales de expertos y testigos presenciales. Los tsunamis de Jamaica no han afectado a las costas de Cuba, a pesar de su cercanía. No hay influencia de fuentes tsunamigénicas de las partes meridional y occidental del Caribe, ni del Golfo de México, en Cuba. Se exponen las dudas sobre la no influencia de los tsunamis de Haití y República Dominicana en Guantánamo, bahía que está más cerca y en la misma latitud, e idéntica orientación espacial que la homóloga de Santiago de Cuba, que se dice ha tenido afectaciones. Las cifras de víctimas mortales en el Caribe son diferentes y contradictorias.

stiffness and pulse wave velocity / Aorta and carotid arteries 137 (0.94 to 1.01) p = 0.096; Obesity OR = 0.47 (0.29 to 1.77) p = 0.003 and Diabetes OR = 2.41 (1.15 -5.05) p = 0.020. Conclusions: According to the results obtained, genetic polymorphisms variables were not in the multivariate analysis equation to determine the increase of the PWV, which can be explained either by being included in the selected variables such as hypertension, or on the other hand, they may not have enough strength to remain in the equation. So, according to this study, PWV has much more to do with behaviors and traditional risk factors than the genetic heritage.P883 Endothelial dysfunction, pulse wave velocity and augmentation index are correlated in subjects with systemic arterial hypertension?

On August 20, 1852, an earthquake caused widespread destruction in the city of Santiago de Cuba and its surroundings. A comprehensive search for contemporary documentation was made. The information gathered was used for a detailed analysis of the damage from and characteristics of the earthquakes. Intensities were evaluated at 45 localities, and an isoseismal scheme has been drawn. Maximum intensity reached 8 degrees (MSK), and 6.4 was the estimated magnitude. Damage to the city of Santiago de Cuba has been studied in detail. The low quality of construction aggravated the damage. The total number of casualties was two dead and approximately 200 injured. The shock was felt within 80,000 km2. The epicenter was determined as 19.75º N, 75.32º W, h = 30 km. This study shows that contemporary Cuban documents must be studied with care in their historical and cultural background to avoid overestimating earthquake intensities.