The source parameters for the 14 March 2005 earthquake in the Koyna–Warna region have been estimated using data from three broadband seismological observatories installed by us at regional distances in the Indian Peninsular shield. Spectral analysis of SH-waveform on transverse component of the three-component seismograms is performed. The estimated seismic moment (M₀), source radius (r), stress drop (Δσ) and moment magnitude (Mw) for this earthquake are 3.9 x 10¹⁶ N-m, 975 m, 19 MPa and 5.1 respectively. The near-surface attenuation factor (κ) is found to be of the order of 0.01 for the stable shield region, suggesting a thin low-velocity sediment beneath the region. The estimated stress drop of the earthquake is higher compared to the other intraplate earthquakes in India. The focal mechanism solution estimated for this event using amplitudes and polarities of direct P- and S-waves suggests the fault plane with strike N312°, dip 36° and rake 248°.