RESUMO
Understanding micro-seismicity is a critical question for earthquake hazard assessment. Since the devastating earthquakes of Izmit and Duzce in 1999, the seismicity along the submerged section of North Anatolian Fault within the Sea of Marmara (comprising the "Istanbul seismic gap") has been extensively studied in order to infer its mechanical behaviour (creeping vs locked). So far, the seismicity has been interpreted only in terms of being tectonic-driven, although the Main Marmara Fault (MMF) is known to strike across multiple hydrocarbon gas sources. Here, we show that a large number of the aftershocks that followed the M 5.1 earthquake of July, 25th 2011 in the western Sea of Marmara, occurred within a zone of gas overpressuring in the 1.5-5 km depth range, from where pressurized gas is expected to migrate along the MMF, up to the surface sediment layers. Hence, gas-related processes should also be considered for a complete interpretation of the micro-seismicity (~M < 3) within the Istanbul offshore domain.
RESUMO
With the backing of a socialist government that came to power in 1982, mental health services in Spain are shifting away from institutional and custodial care toward community-based services. Provincial governments now control most mental health programs as a result of a law passed in 1983. In Madrid, mental health service priorities include preventing psychiatric hospitalization, developing a range of residential facilities, reducing the population of chronic patients in hospitals, and improving the quality of hospital care. A network of 20 health promotion centers is being developed to serve newly identified patients, while long-stay hospital patients who can be discharged will become the responsibility of social services. From an international perspective, the most interesting aspect of the Spanish transformation is how the country will deal with the problems other nations have encountered in implementing systems reforms.