HEAR is equipped with modern elementary particle detection system measuring cosmic ray electrons, muons and gamma rays. The electric mill is monitoring the electric field above the lake and lightning detector - the occurrences and distance to lightning flashes. All together the research complex is ideally suited for research of high-energy phenomena in atmosphere, including Thunderstorm ground enhancements (TGEs) discovered at Aragats, relativistic runaway electron avalanches and enigmatic particle bursts correlated with lightning. The unique location of station near large high-mountain lake is extremely favorable for discovering new high-energy phenomena in terrestrial atmosphere, ionosphere and magnetosphere.

HEAR along with 3 other YerPhI research stations will provide early warnings on upcoming severe storms, when thunderclouds appear ~1000 km from Armenian borders. Station will operate 24 hours/12 months and will send the data and forewarnings to Yerevan CRD headquarters and to mirror sites in Europe and USA.

 Figure 1 HEAR monitors: STAND1 and NaI particle detectors are measuring 1-minute time series (in the right); electronics and control equipment send data on-line each minute to Yerevan CRD headquarters (on the table).   Figure 2 Time series of charged particle fluxes measured by the layered STAND1 detector; when large enhancement of count rate occurred data from 3 scintillators will be used for recovering integral energy spectrum of TGE events.  Figure 4 Shore of Sevanlake near YErPhI summer hotel; note clouds in the air – potential source of particle fluxes!