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

• Autorzy: Kumar N. , Rawat G. , Choubey V. , Hazarika D.
• Języki publikacji: EN

Abstrakty

EN

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

Słowa kluczowe

EN

earthquake precursory; MPGO; Garhwal Himalaya; environmental effects

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2013
• Tom: Vol. 61, no. 4
• Strony: 977--999
• Opis fizyczny: Bibliogr. 67 poz.

Twórcy

autor

Kumar N.

• Wadia Institute of Himalayan Geology, Dehradun, India

autor

Rawat G.

• Wadia Institute of Himalayan Geology, Dehradun, India

autor

Choubey V.

• Wadia Institute of Himalayan Geology, Dehradun, India

autor

Hazarika D.

• Wadia Institute of Himalayan Geology, Dehradun, India

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