The Indian National Science Academy (INSA), the National Adhering body
representing India in the International Union of Geodesy and Geophysics
(IUGG), submits a National Report to the IUGG during its General
Assembly, held every four years. The present chapter is a compilation
for the International Association of Seismology and Physics of the
Earth’s Interior (IASPEI), one of the eight Associations of the IUGG,
encompassing the scientific activities carried out in the country during
2019-2022, in the field of seismology. The chapter is arranged to
categorize the contributions under internal structure of the Indian
lithosphere and sub-lithospheric mantle, crust and upper mantle
deformation, seismic attenuation, seismic hazards, triggered seismicity,
environmental seismology, paleoseismology and seismological networks. In
addition, the chapter includes activities related to societal projects
and outreach programs. It is not an exhaustive review of the entire
Indian contribution to seismology and allied fields during this period
but a window to the topics covered within the framework of IASPEI.
During the reporting period, researchers from several Indian R&D and
Academic Institutions continued adding new results on the crustal and
upper mantle structure of the Indian shield, both at regional and
geological province scale. The Himalaya has been a major focus of
seismological research for many Institutes who operated broadband
seismological networks from Kashmir to Arunachal along the Himalayan
arc. The data from these networks have facilitated in enhancing our
understanding of the structure of the Main Himalayan Thrust, crustal and
upper mantle structure as well as the dip of the underthrusting Indian
plate, seismicity monitoring, and estimation of attenuation. Some of
these networks also include accelerographs for strong ground motion
studies. A few studies also focused on mapping of the mantle transition
zone beneath the Indian Ocean Geoid Low. The studies on anthropogenic
seismicity added near-field investigations in the Koyna - Warna region
through borehole seismology. Organization of the Joint Scientific
Assembly of IAGA and IASPEI during 21-27 August 2021 (JSA-2021) was a
major event during this period related to the IUGG activities.
Originally, the event was planned to be hosted at Hyderabad, India, but
due to the COVID-19 pandemic it was organized in virtual mode.
Initiatives have been taken to nucleate the field of environmental
seismology in the country.
Keywords: IUGG, IASPEI, INSA, National Report, Seismology