Observational Seismology
Core Competence:
- Seismicity monitoring, RTS and LET studies for Hydro projects
- Tomographic imaging of crustal and upper mantle structures
- Seismic structure, Anisotropy and mantle deformation studies
- Subduction zone seismology and intraplate tectonics
- Application of Deep learning models in seismology
- Estimation of source parameters and developing regional scaling laws
- Attenuation studies to understand energy loss mechanisms
- Modelling earthquake rupture dynamics
- Source characterization and Stress inversion studies
- Earthquake location/relocation using different algorithms
- Spatio-temporal analysis of seismicity
Significant Contributions:
- Advanced methodologies in attenuation analysis, yielding deeper insights into seismic energy dissipation
- Investigated reservoir-triggered seismicity with field data and modelling, directly influencing regional risk management practices
- Developed robust scaling relations for small earthquakes, contributing to improved hazard assessment for Intraplate region Kachchh, and Saurashtra
- Understanding the role of monsoon-induced seismic swarm activity in different regions of Gujarat state
- Developed a Python-based toolkit “SeisAug” for data augmentation in seismological studies
- Developed CNN based models for identifying blasts and earthquakes
- Enhanced tomographic imaging techniques that resolve detailed subsurface structures
- Conducted detailed focal mechanism analysis of earthquakes in Gujarat and Northeast India using waveform modeling techniques, enhancing understanding of regional fault dynamics and stress orientations
- Site amplification studies to aid urban planning and disaster risk reduction initiatives
- Insights into the lithospheric structure and seismicity of the Andaman-Nicobar Subduction Zone
- Study on subslab anisotropy and seismic source characterization in multiple Indian tectonic provinces
- Created comprehensive seismicity maps using GMT and Python, incorporating earthquake magnitude, depth, and spatial distribution for accurate hazard interpretation
Current Pursuits:
- Investigating crustal and lithospheric properties using receiver function and shear-wave splitting techniques.
- Studying the lowermost mantle (D'' layer) using shear-wave splitting techniques to understand mantle dynamics.
- Developing an automated system for detecting, locating, and notifying information about local earthquakes at ISR’s data center using SeisComP.
- Exploring the application of AI to various seismological research problems; conceptualized and currently developing ISR’s official GitHub repository:https://github.com/ISR-AIML/
- Continuing to refine source parameter estimates and scaling laws through both field observations and data analyses.
- Conducting detailed attenuation studies to better understand seismic wave propagation.
- Utilizing seismic tomography for high-resolution imaging of the crust beneath Gujarat.
- Monitoring and modeling reservoir-triggered seismicity as part of integrated near-real-time seismological systems.
- Leveraging near-real-time seismic data for rapid earthquake detection and early warning.
- Engaged in detailed evaluation of ground motion characteristics to assess local seismic response and site effects.
- Estimating focal mechanisms of local earthquakes through waveform modelling, aiming to improve understanding of active fault systems and stress orientations in Gujarat.
Personnel:
- Dr. Santosh Kumar, Scientist - E, Group Head
- Dr. G. Srijyanthi, Scientist-C
- Dr.ArunPrasath R, Scientist-C
- Dr. Rakesh Kumar Bhagora, Scientist-B
- Mr. Jignesh Patel, Technical Officer
- Mr. GanpatParmar, Technical Officer