Earthquake precursory research in western Himalaya based on the multi-parametric geophysical observatory data

摘要: The opening of cracks and influx fluids in the dilatancy zone impending earthquake is expected to induce short-term changes physical/chemical/hydrological properties during build-up cycle, which should be reflected time-varying geophysical fields. With this rationale, eleven parameters are being recorded continuous mode at Multi-Parametric Geophysical Observatory (MPGO), Ghuttu, Garhwal Himalaya, for precursory research. critical analysis various time series indicates anomalous behavior few occasions; however, data also influenced by many external forces. These influences major deterrent isolation signals. recent work focused on adoptive techniques estimate eliminate effects solar-terrestrial hydrological/environmental factors delimiting identify precursors. Although any significant not reported close observatory, some weak signals coseismic have been identified related occurrence moderate strong earthquakes.