The ground- based World Wide Lightning Location Network (WWLLN, managed by Department of Earth and Space Sciences, University of Washington, Seattle, Washington, USA) detects very low frequency (VLF) radio waves emitted by lightning. It is most sensitive to cloud-to-ground (CG) flashes since they radiate strongest in the VLF range.

A global lightning detection system has a variety of applications in the scientific, commercial, and governmental sectors. Scientifically, it could provide a better understanding of the global electric circuit and provide better understanding of the physics of atmospheric discharges. Its seasonal and yearly averaged data could be used as an indicator of global climate change as well as in estimating the direct impacts on the local regional environments, including agriculture sector. Global lightning data could be used in the commercial sector and in the governmental sector (e.g.,tracking of severe storms and forecasting of hail).

Continuing its policy of joining and creating international measurement network CRD in fall of 2013 joins the WWLLN installing measuring equipment in Yerevan. In the Figure below one can see symbolic image of the Armenian node of WWLLN between Caspian and Black seas. By red, green and yellow dots the lightning occurrences are denoted; in winter lightnings occur mostly in equatorial region and Sought hemisphere.

 

Each lightning stroke location requires the time of group arrival from at least 5 WWLLN sensors. The geographical arrangement of the sensors is important. Enhancing the accuracy of lightning detection requires more stations especially in the “empty” regions. The Armenian station is very important. To the East and North of Armenian station there is no other nodes thousands of kilometers along. To the Sought   and West the only station is in Tel-Aviv. Therefore Armenian node will participate in lightning detection in areas covering tens of thousands square kilometers bringing new information to WWLLN.

The research of high-energy phenomena in atmosphere conducted by CRD at slopes of Aragats mountain and near Sevan lake will also highly profit from WWLLN information. Comparing the WWLLN data on lightning location and type with information from Armenian local lightning detection network will help to calibrate Armenian network and check its time precision.