caa a22 4500 47704784X CHVBK 20180405111335.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF00878841 doi (NATIONALLICENCE)springer-10.1007/BF00878841 Bhattacharya S. Seismological Observatory, India Meteorological Department, Lodi Road, 110003, New Delhi, India aut Determination of source duration and moment of earthquakes in the Indian Peninsula using love waveforms [Elektronische Daten] [S. Bhattacharya] Love waves recorded by a long-period seismograph at New Delhi (NDI) from seven earthquakes of magnitude 4.3 to 5.2 in Koyna and Bhatsa on the western coast and one earthquake in Ongole on the eastern coast of the Indian Peninsula have been used to determine the seismic moment for each of the earthquakes by waveform modeling. Transverse component of the synthetic seismogram shows that the maximum amplitude of waveform decreases with an increase of source duration. Thus for an evaluation of the seismic moment by equating the amplitude level of the observed and synthetic waveforms, we must know the source duration. The synthetic seismogram also indicates that a short source duration gives rise to a small but sharp pulse and this pulse is interpreted as anLg wave. Comparison of the observed and synthetic waveforms has been used for a simultaneous evaluation of the source duration and seismic moment. The source durations are found to vary between 2.2 and 4.4 s; for earthquakes with a magnitude range between 4.3 and 5.2 these durations are slightly higher than normal. We obtain moment (M 0) of Ongole earthquake (M L =5.1)as 1.7×1024 dyne-cm; moments of Koyna and Bhatsa earthquakes (4.3≤M L ≤5.2) on the western coast lie between 0.7×1023 and 3.6×1023 dyne-cm. Moment (M 0)-magnitude (M L ) relation logM 0=1.5M L +16.0 for the western United States region agrees as well, in general, with the results for the earthquakes in the Indian Peninsula. Birkhäuser Verlag, 1996 Seismic moment nationallicence source duration nationallicence Love waveforms nationallicence pure and applied geophysics Birkhäuser-Verlag 147/3(1996-08-01), 497-514 0033-4553 147:3<497 1996 147 24 https://doi.org/10.1007/BF00878841 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00878841 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bhattacharya S. Seismological Observatory, India Meteorological Department, Lodi Road, 110003, New Delhi, India aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/3(1996-08-01), 497-514 0033-4553 147:3<497 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer