TeleConsult Austria (Austria)

Abstract. Lithospheric ultra low frequency (ULF) magnetic activity is recently considered as a very promising candidate for application to short-time earthquake forecasting. However the intensity of the ULF lithospheric magnetic field is very weak and often masked by much stronger ionospheric and magnetospheric signals. The study of pre-earthquake magnetic activity before the occurrence of a strong earthquake is a very hard problem which consists of the identification and localization of the weak signal sources in earthquake hazardous areas of the Earth's crust. For the separation and localization of such sources, we used a new polarization ellipse technique (Dudkin et al., 2010) to process data acquired from fluxgate magnetometers installed in the Sichuan province, China. Sichuan is the region of the strongest seismic activity on the territory of China. During the last century, about 40 earthquakes with magnitude M ≥ 6.5 happened here in close proximity to heavy populated zones. The Panzhihua earthquake Mw = 6.0 happened in the southern part of Sichuan province on 30 August 2008 at 8:30:52 UT. The earthquake hypocentre was located at 10 km depth. During the period 30–31 August – the beginning of September 2008, many clustered aftershocks with magnitudes of up to 5.6 occurred near the earthquake epicentre. The data from three fluxgate magnetometers (belonged to China magnetometer network and placed near to the clustered earthquakes at a distance of 10–55 km from main shock epicenter) have been processed. The separation between the magnetometers was in the range of 40–65 km. The analysis of a local lithospheric magnetic activity during the period of January–December 2008 and a possible source structure have been presented in this paper.

Wireless access has a place in the emerging telecommunication networks of developing countries. Unlike developed countries, where wireless will improve the portability and convenience of a basic service, wireless access is a potentially powerful technology for developing countries, enabling rapid and cost effective deployment of basic service. The paper addresses the technical requirements and cost targets needed to release this substantial market. The essential ingredient is a dramatic, order of magnitude cost improvement over conventional technology. Although rural is emphasized, the figures and concepts embrace both urban and rural landscapes.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Sp ittlebug (Homoptera : Ce rcopidae ) f l uctuation bet~ 6,00am and 7,00pm .Population survey of adult spittlebugs between 6,00amand 7 ,00pm, indicated that Zulia ( No t o zulia ) e n t r e r ia n a (Berg, 1879) and Deois ( A c an t h o d eois) fl a v o pi c ta (Stal , 1854) have higher a c tivity in the morning and late afternoon.However , no statistical significance was found in the fluctuation in relation to the sampling hours, using the sweeping net me thod.