where aPG is in unknown units (probably m∕s2), a = 0.086, b = -0.547, c = 0.185 and σ = 0.18.
Data from 5 stations on hard rock, 1 on sandstone, 1 on granite gneiss and 1 on quartzite sandstone.
Data from 8 broadband stations operated by NEIST-Jorhat and NGRI-Hyderabad: 5 with CMG-3T, 2
with CMG-3ESP and 1 with Trillium 240 sensors. Seismograms convert to acceleration using real-time