COMPILATION OF ACTIVE FAULT DATA IN PORTUGAL FOR USE IN SEISMIC HAZARD ANALYSIS

To estimate where future earthquakes are likely to occur, it is essential to combine information about past earthquakes with knowledge about the location and seismogenic properties of active faults. For this reason, robust probabilistic seismic hazard analysis (PSHA) integrates seismicity and active fault data. Existing seismic hazard assessments for Portugal rely exclusively on seismicity data and do not incorporate data on active faults. Project SHARE (Seismic Hazard Harmonization in Europe) is an EC-funded initiative (FP7) that aims to evaluate European seismic hazards using an integrated, standardized approach. In the context of SHARE, we are developing a fully-parameterized active fault database for Portugal that incorporates existing compilations, updated according to the most recent publications. The seismogenic source model derived for SHARE will be the first model for Portugal to include fault data and follow an internationally standardized approach. This model can be used to improve both seismic hazard and risk analyses and will be combined with the Spanish database for use in Iberian- and European-scale assessments

Efeitos da radiação gama na conservação de variedades de cebola ( Allium cepa) da região do São Francisco, Pernambuco

Three varieties of onion (Allium cepa), "Amarela das Canárias", "Pera de Pernambuco" and Asgrow, cultivated in the São Francisco River region (Pernambuco), were irradiated at doses of 4, 8 and 12 krad, and were stored in Recife, at ambient temperature. In this preliminary experiment, rotting, loss of weight and sprouting of onions were observed during 120 days. After this period, the mean conservation index, expressed as the percent of the initial number of bulbs, reached, for the former two varieties, values of 92, 94 and 83% corresponding to doses of 12, 8 and 4 krad, respectively; whereas the Asgrow variety exhibited a mean conservation index of 3%. The non irradiated Asgrow samples were at that time wholly spoiled. No sprouting was observed in the irradiated samples and the total loss of weight was more marked in the non-irradiated bulbs. The statistical analysis of experimental data indicated that irradiation conservation effects were significant at the 0,1% level for the "Amarela das Canárias" and "Pera de Pernambuco" varieties, as verified through the F-test. Moreover, the analysis of variance displayed no significance for the interaction effects between doses and varieties, and the loss of weight through dehydration, followed up to 55 days did not show differences at the usual significance levels.Três variedades de cebola, Amarela das Canárias, Pera de Pernambuco e Asgrow, bastante cultivadas na região do São Francisco, foram irradiadas com doses de 4, 8 e 12 krad e estocadas à temperatura ambiente, em Recife, PE, sendo observadas durante um período de 120 dias quanto à ocorrência de podridão, perda de peso e germinação. As percentagens médias de conservação após este período nas duas primeiras variedades foram de 92%, 94% e 83% para as doses de 12, 8 e 4 krad, e de apenas 3% para a variedade Asgrow. As testemunhas apresentaram conservação ao nível máximo de apenas 18%. Nenhuma germinação foi observada nas amostras irradiadas e a perda de peso foi mais acentuada nas não irradiadas. A análise estatística dos dados obtidos evidenciou que a conservação nas variedades Amarela das Canárias e Pera de Pernambuco foi significativa ao nível de 0,1% pelo teste F. A análise da variância não mostrou diferenças significativas entre os efeitos da interação dose versus variedade

Compilation of parameterized seismogenic sources in Iberia for the SHARE European-scale seismic source model.

Abstract: SHARE (Seismic Hazard Harmonization in Europe) is an EC-funded project (FP7) that aims to evaluate European seismic hazards using an integrated, standardized approach. In the context of SHARE, we are compiling a fully-parameterized active fault database for Iberia and the nearby offshore region. The principal goal of this initiative is for fault sources in the Iberian region to be represented in SHARE and incorporated into the source model that will be used to produce seismic hazard maps at the European scale. The SHARE project relies heavily on input from many regional experts throughout the Euro-Mediterranean region. At the SHARE regional meeting for Iberia, the 2010 Working Group on Iberian Seismogenic Sources (WGISS) was established; these researchers are contributing to this large effort by providing their data to the Iberian regional integrators in a standardized format. The development of the SHARE Iberian active fault database is occurring in parallel with IBERFAULT, another ongoing effort to compile a database of active faults in the Iberian region. The SHARE Iberian active fault database synthesizes a wide range of geological and geophysical observations on active seismogenic sources, and incorporates existing compilations (e.g., Cabral, 1995; Silva et al., 2008), original data contributed directly from researchers, data compiled from the literature, parameters estimated using empirical and analytical relationships, and, where necessary, parameters derived using expert judgment. The Iberian seismogenic source model derived for SHARE will be the first regional-scale source model for Iberia that includes fault data and follows an internationally standardized approach (Basili et al., 2008; 2009). This model can be used in both seismic hazard and risk analyses and will be appropriate for use in Iberian- and European-scale assessments