Dr. Tormod Kværna has throughout his career worked with questions related to recording and analysis of nuclear tests, the global surveillance system for Comprehensive Nuclear-Test-Ban Treaty (CTBT), and method development.
- We have always been at the forefront of development of methods of signal processing. Many of these methods are now used in the analysis of data from the global surveillance system, says Dr. Tormod Kværna, Head of R&D Seismology.
Seismology has great application in earthquake monitoring and mapping of geology and resources. Infrasound is a recent research area.
- Based on work related to the CTBT, NORSAR has in recent years developed expertise in infrasound, a technology used to identify any atmospheric nuclear tests, says Dr. Kværna.
In 2014, Norway's newest contribution to the global surveillance network, an infrasound station in Bardufoss was opened.
- This is the most modern infrasound station in the world, and has already given us a lot of interesting data, such as incidents involving sudden warmings of the upper atmosphere. This is significant for the weather situation here on earth. We work constantly to find new and exciting applications for the technology. The infrasound technology can for example be used to provide information about extreme events like volcanic eruptions, large meteors entering the atmosphere, industrial and mining accidents, plane crashes and explosions. Recent research suggests that these data can also help to secure meteorological long-term forecasts, and information on upcoming extreme weather like storms and polar lows, says Dr. Kværna.
NORSAR has since the 1970s been a leader in the use of seismology to detect underground nuclear explosions. The seismic station NORES in Hedmark, which was built in 1984, became a model for stations that were later built in the global network.
Dr. Tormod Kværna is a graduate of the University of Oslo and has a doctorate in geophysics.