Figure 1
(a) Station location map of the Kumaon—Garhwal (KG) Himalayan region. Filled red triangles mark the location of broadband stations. Two medium size blue-filled circles mark the epicentral locations of the 1991 Mw6.8 Uttarkashi and 1999 Mw6.5 Chamoli earthquakes. The solid black line represents major faults. MT Munsiari Thrust, VT Vaikrita Thrust, MBT Main Boundary Thrust, MFT Main Frontal Thrust, RT Ramgarh Thrust, MHT Main Himalayan Thrust. SH, LH, AK, LK and MZ mark Siwalik Himalaya, Lesser Himalaya, Almore klippe, Lansdown Klippe and MCT zone, respectively. (a) is generated using the Generic Mapping Tool (GMT) software version 661(https://doi.org/10.1029/2019GC008515). The elevation data used in generating GMT plot is obtained from the open source Digital Elevation Model (DEM) (https://asterweb.jpl.nasa.gov/gdem.asp). Locations of five NE-SW (viz., AB, CD, EF, GH and IJ) are shown by filled thick white lines) while four WNW–ESE profiles (viz., KL, MN, OP and QR) are shown by filled thick black lines. The inset shows Indian subcontinent where our study area is marked by a red square area, (b) Tectonic depth cross-section (Valdiya, 1980) across the NE-SW CD profile, whose location is shown in (a), and (c) Epicentral plot of 133 teleseismic events of Mw 5.0–7.8, whose broadband data from the Uttarakhand network, are used for our P-receiver function study. A filled red triangle marks the center of our network (Lat. 79°, Long. 30°).
