Seismicity of Kerala: An update
John Biju, Babu A Rajan, D.S. Subrahmanyam, Singh Yogendra, E. Praseeda, K.S. Divyalakshmi, Nelliat Sandeep, Samui Pijush, G.P. Ganapathy
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.76How to use a DOI?
- Seismicity; horizontal stress; neotectonic; recurrence interval
- The earthquake catalogue of the Kerala State indicates that the central part of the state (Wadakkancheri-Trissur and Idukki –Kottayam- Pala) is witnessing repeated seismicity. Though lineaments of all directions are identified in Kerala, some NW-SE trending structures are identified as neotectonically active and some of these NW-SE trending structures are even the source of recent seismicity. Some of the fault related geological studies in Peninsular India (Wadakkancheri, Periyar and Thenmala faults) identified that the region is responding to compressive tectonic regime. The slickensides from these faults indicate the recent movements are consistent with the present tectonic stress regime. Though the geological observations and seismological data indicate northeast directed stress regime, the in-situ stress measurement carried out at northern side of the study area shows local perturbation in maximum horizontal stress. Analysis of available seismic data of the region suggest that the seismic source at Idukki-Pala is indicating some recurrence pattern for moderate earthquakes and are spatially located close to the southeastern end of Periyar fault. The seismicity in the Wadakkancheri-Trissur, on the other hand, falls in the northwestern end of Periyar fault. It is also to be noted that the earthquakes in central Kerala were occurring as doublets. Thus, the estimation of earthquake potential of these regions through a proper integration of different disciplines and techniques is the need of the hour
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - John Biju AU - Babu A Rajan AU - D.S. Subrahmanyam AU - Singh Yogendra AU - E. Praseeda AU - K.S. Divyalakshmi AU - Nelliat Sandeep AU - Samui Pijush AU - G.P. Ganapathy PY - 2016/11 DA - 2016/11 TI - Seismicity of Kerala: An update BT - Recent Advances in Rock Engineering (RARE 2016) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/rare-16.2016.76 DO - https://doi.org/10.2991/rare-16.2016.76 ID - Biju2016/11 ER -