Informatics Publishing Limited

Harsh K. Gupta ¹, Kusala Rajendran ¹, H. N. Singh ¹

Affiliations
1 Centre for Earth Science Studies, Trivandrum 695 010, IN

Abstract

The north-east India region is seismically one of the most active regions In the world. An earthquake data base for the region from the earliest time to 1984 is presented here. These data would be utilized for investigating the earthquake phenomenon in the region.

Full Text

     

Kusala Rajendran ¹, C. P. Rajendran ¹

Affiliations
1 Centre For Earth Science Studies, Trivandrum-695 031, IN

Abstract

The occasional incidences of microearthquakes in Kerala have been interpreted to be caused by the reactivation of ancient preexisting faults. While not negating the traditional wisdom, we propose an unconventional approach to analyze the mechanism of microseismicity in Kerala. A moot point considered here is the perceptive increase in the frequency of the microearthquakes in the state over the last decade, quite often coinciding with periods of increased rainfall. Although the occurrence of rain may not be a sufficient or necessary condition for the increase in the level of seismic activity, the correspondence between the two appears to be more than casual. On the basis of this observation. we suggest here that the tremors in Kerala may have been caused by transient increase in the hydrostatic pressure at shallow crustal depths. The mechanism of shallow earthquakes may be similar to what is proposed in the "hydroseismicity" model. Changing land use patterns, deforestation, soil erosion and increased siltation in the drainage basins are the robust parameters in this model.

Keywords

Micro- and Hydroseismicity, Rainfall, Kerala.

Full Text

     

Kusala Rajendran ¹, C. P. Rajendran ¹, Sreekumari Kesavan ¹

Affiliations
1 Centre for Earth Science Studies, Akkulam, Thiruvananthapuram - 695 031, IN

Abstract

This note deals with the mild earth tremors that occurred near Thalasseri, Kannur District on November 8,2003. Based on the activity detected by the broadband observatory at Peechi (PCH), we suggest an additional source zone in Kerala.

Full Text

   

Kusala Rajendran ¹

Affiliations
1 Centre for Earth Sciences, IISc, Bangalore - 560 012, IN

Abstract

No Abstract.

Full Text

   

Kusala Rajendran ¹

Affiliations
1 Centre for Earth Sciences, Indian Institute of Science, Bengaluru 560 012, IN

Abstract

T. S. Balakrishnan, a geophysicist, who worked all his life exploring for oil and decoding the tectonic features of the Indian subcontinent, died in Bengaluru on 8 August 2018 after a short period of age-related illness. He was 91. Born in Thrissur, Kerala in 1928, Balakrishnan did his education in Bombay and Allahabad Universities and completed his postgraduation in Physics, in 1947. He started his scientific career working on X-ray crystallography, at C. V. Raman’s laboratory in the Indian Institute of Science (IISc), Bangalore where he worked from 1947 to 1953. He joined the Geological Survey of India in 1953, where he started his work in geophysical exploration. His interest in geophysical exploration found its most fertile ground as he joined the Oil Natural Gas and Commission (ONGC) in 1956, as one of its earliest geophysicist recruits.

Full Text