Modeling of the strong ground motion of 25th April 2015 Nepal earthquake using modified semi-empirical technique

• Autorzy: Lal, S. , Joshi, A. , Sandeep , Tomer, M. , Kumar, P. , Kuo, C.-H. , Lin, C.-M. , Wen, K.-L. , Sharma, M. L.
• Języki publikacji: EN

Abstrakty

EN

On 25th April, 2015 a hazardous earthquake of moment magnitude 7.9 occurred in Nepal. Accelerographs were used to record the Nepal earthquake which is installed in the Kumaon region in the Himalayan state of Uttrakhand. The distance of the recorded stations in the Kumaon region from the epicenter of the earthquake is about 420–515 km. Modified semiempirical technique of modeling finite faults has been used in this paper to simulate strong earthquake at these stations. Source parameters of the Nepal aftershock have been also calculated using the Brune model in the present study which are used in the modeling of the Nepal main shock. The obtained value of the seismic moment and stress drop is 8.26 9 1025 dyn cm and 10.48 bar, respectively, for the aftershock from the Brune model .The simulated earthquake time series were compared with the observed records of the earthquake. The comparison of full waveform and its response spectra has been made to finalize the rupture parameters and its location. The rupture of the earthquake was propagated in the NE–SW direction from the hypocenter with the rupture velocity 3.0 km/s from a distance of 80 km from Kathmandu in NW direction at a depth of 12 km as per compared results.

Słowa kluczowe

PL

spektra odpowiedzi; wzmocnienie miejsca; modelowanie; silny ruch; sejsmiczność himalajska; widma przesunięcia

EN

response spectra; modeling; strong motion; himalayan seismicity; displacement spectra; site amplification

• Czasopismo: Acta Geophysica
• Rocznik: 2018
• Tom: Vol. 66, no. 4
• Strony: 461--477
• Opis fizyczny: Bibliogr. 59 poz.

Twórcy

autor

Lal, S.

• Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India,

autor

Joshi, A.

• Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India

autor

Sandeep

• Department of Geophysics, Institute of Science, Banaras Hindu University, Varanasi, India

autor

Tomer, M.

• Geological Survey of India, Hyderabad, India

autor

Kumar, P.

• Wadia Institute of Himalayan Geology, Dehradun, India

autor

Kuo, C.-H.

• National Centre for Research on Earthquake Engineering, Taipei, Taiwan

autor

Lin, C.-M.

• Department of Earth Sciences, National Central University, Chungli, Taiwan

autor

Wen, K.-L.

• Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee, India

autor

Sharma, M. L.

• Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee, India

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