Terre Adélie Neutron Monitor

One defective counter tube has been replaced on TERA 9NM64 on 19/11/2021. The count rate is slightly higher since then, with a difference smaller than 1% however. The corrected_for_efficiency value will take this change into account when we have enough hindsight to evaluate more precisely the bias.


A new Neutron Monitor has been installed in Dourbes.

GLE 73

A X1.0 class X-ray flare occurred on 2021/10/28. Solar Energetic Particles have been recorded by GOES and Stereo. The polar stations of the Global Neutron Monitor Network have seen a sudden, but moderate, increase in cosmic ray count rates.

Tibet data not available via NMDB

Tibet data needs to be reconfirmed for release, thus Tibet data is temporarily not available via NMDB.

Proceedings of the "1st virtual symposium on cosmic ray studies with neutron detectors"

The Proceedings of the “1st virtual symposium on cosmic ray studies with neutron detectors” are available online.

Evgenia Eroshenko

Evgenia Eroshenko from IZMIRAN, Russia, passed away at the age of 80 years on June 3, 2021. Evgenia Eroshenko had a long-standing career with research on all aspects of cosmic ray observations with neutron monitors.

Roger Pyle

Roger Pyle passed away at the age of 78 years on May21, 2020. He had been a long-standing member of the cosmic ray group at the University of Delaware, Newark, and continued working for the operation of the ‘Spaceship Earth’ network after his retirement in 2007.

Michel Alania

Michel Alania passed away at the age of 85 years on May 18, 2020. He was the designer and first PI of the neutron monitor in Tbilisi, Georgia, and made long-standing contributions to cosmic ray research, especially on the solar modulation of cosmic rays, as a researcher and head of the cosmic ray group at Siedlce University, Poland.

new station: ORCA

A new Neutron Monitor station has been installed on Livingston Island at the Spanish Antarctic Base Juan Carlos I: ORCA.

Karel Kudela

Karel Kudela from the Institute of Experimental Physics, Košice, Slovakia passed away at the age of 72 on January 20th, 2019. He was an outstanding scientist in Cosmic Ray Variations and Space Physics and a founding member of NMDB.