| Abstract Submission No. | ABS-3.1-0102 |
| Title of Abstract | Spatio-Temporal Assessment of Seismic Activity in NW Himalaya J&K based on b-value ,p-value and z-value Analysis |
| Authors | Sindu Kumari*, Ambikapathy Ammani, O.P. Mishra |
| Organisation | National Center for Seismology-Ministry of Earth Sciences, New D |
| Address | NCS,MAUSAM BHAWAN COMPLEX NEW DELHI, NEW DELHI, India Pincode: 110003 E-mail: sinduk419@gmail.com |
| Country | India |
| Presentation | Poster |
| Abstract | The research focuses on understanding earthquake behavior in the northwestern Himalaya, covering Jammu & Kashmir, Zanskar, and Kishtwar between 33°⿿37° N and 72°⿿80° E. Using data from NCS⿿MoES, USGS, ISC, and GCMT between 1900⿿2024, about 9700 earthquakes (M 1.5) were analyzed. The b-value was used to study the frequency⿿magnitude relation, and the area was grouped into three segments⿿Block A (Kashmir), Block B (Zanskar), and Block C (Kishtwar). The 2005 Kashmir, 2013 Jangalwar, and 2023 Doda earthquakes were examined to calculate aftershock decay (p-value) and seismicity rate change (z-value). Results show b-values between 0.62 and 0.93, indicating differences in stress and tectonic activity. The Kashmir and Kishtwar blocks, with lower b-values, show higher stress build-up and the potential for future strong earthquakes. Seismic activity is mainly controlled by the interaction between the Karakoram, Pir Panjal, and Shivalik ranges, and deep-seated fault systems. The observations highlight that this region behaves as a tectonically active foreland zone near a convergent margin, where varying b-values reflect complex stress accumulation and crustal deformation processes. |
| Keywords | Seismicity, spatiotemporal, p value, b value and z value |