01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-05-0381 |
| Title of Abstract | Seismological Network of India⿿RTSMN for Tsunamigenic Earthquake Detection: A Review Two Decades after the Indian Ocean Tsunami |
| Authors | Dr. B. Ajay Kumar*, Dr. Ch. Patanjali Kumar, Prof. B. Veeraiah, Dr. B. Sairam, Dr. G. Suresh, Dr. Sudheer Jospeh, Dr. TM. Balakrishnan Nair |
| Organisation | Indian National Centre for Ocean Information Services (INCOIS), M |
| Address | INCOIS Hyderabad, Telengana, India Pincode: 500090 E-mail: patanjali@incois.gov.in |
| Country | India |
| Presentation | Oral |
| Abstract | Following the 2004 Indian Ocean tsunami, the Indian Tsunami Early Warning Centre (ITEWC) was rapidly established at INCOIS to provide essential real-time tsunami monitoring and advisory services across the Indian Ocean region. This study offers a systematic operational analysis of ITEWC, with a focus on the key performance metrics of the Real-Time Seismological Monitoring Network (RTSMN), as developed and maintained by the National Centre for Seismology (NCS) over the past two decades. Drawing on comprehensive seismic event catalogues⿿including ISC-GEM, USGS, NCS, and INCOIS⿿this research evaluates detection capabilities for earthquake events, comparing magnitude, location, and depth accuracy across international and national databases. The comparative analysis shows that integration of the RTSMN, with its network of seventeen broadband stations and additional regional inputs, enables the detection of low-magnitude earthquakes (down to approximately 3.4 Mw), a threshold unmatched by global systems alone. Seismic catalogue mapping and spatial clustering assessment illustrate improved accuracy and completeness for regional seismic monitoring, especially in geologically complex or densely populated Indian coastal zones. Application of network simulation tools such as NetMoD demonstrates further potential for optimizing station deployment and enhancing monitoring effectiveness. The ITEWC⿿s operational protocols ensure rapid notification: detection of tsunamigenic earthquakes occurs within 5-6 minutes, and tsunami advisories are issued in less than 10 minutes to all stakeholders throughout the Indian Ocean rim. This operational synergy between INCOIS and NCS offers a regional paradigm for earthquake and tsunami risk management. The research discusses the evolution of earthquake source parameter estimation, network detection thresholds, and spatial coverage limitations, proposing future directions for enhancing detection sensitivity and advisory reliability. The findings demonstrate reductions in false alarm rates and improvements in community safety, establishing the Indian system as a reference model for global tsunami early warning efforts. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | ITEWC, Real-Time Seismological Monitoring Network, tsunamigenic potential, source parameters, tsunami early warning |
| For Awards | no |