Argentina
Universidad Nacional de La Plata

Australia
Geoscience Australia

Belgium
Institut Royal Meteorologique de Belgique

Brazil
Observatorio Nacional

Bulgaria
Bulgarian Academy of Sciences

Canada
Geological Survey of Canada

China
Chinese Academy of Sciences
China Earthquake Administration

Czech Republic
Czech Geophysical Institute

Denmark
Danmarks Meteorologiska Institut

Finland
Finnish Meteorological Institute
University of Oulu

France
Bureau Central de Magnetisme Terrestre
Ecole et Observatoire des Sciences de la Terre
Institute de Recherche pour le Developpement

Germany
GeoForschungsZentrum Potsdam
Ludwig-Maximillians University of Munich

Greece
Institute of Geology and Mineral Exploration

Hungary
Hungarian Academy of Sciences
Eotvos Lorand Geofizikai Intezet

Iceland
University of Iceland

India
Indian Institute of Geomagnetism

Ireland
Met Eireann

Italy
Instituto Nazionale di Geofisica

Japan
Japan Meteorological Agency

Mexico
UNAM Ciudad Universitaria

New Zealand
Geological and Nuclear Sciences

Norway
University of Tromso

Peru
Intituto Geofisico del Peru

Poland
Polish Academy of Sciences

Romania
Institutul Geologic al  Romaniei

Russia
Russian Academy of Sciences
Arctic and Antarctic Research Institute

Samoa
Samoa Meteorology Division

Slovakia
Slovak Academy of Science

South Africa
National Research Foundation

Spain
Observatori de l'Ebre
Instituto Geografico Nacional

Sweden
Sveriges Geologiska Undersokning
Institutet for rymdfysik

Turkey
Bogazici Universitesi

United Kingdom
British Geological Survey

United States
United States Geological Survey

Worldwide
Intermagnet

AGO Antarctica
Antarctic Magnetometer Project
Canopus Canada
Chimag
DMI Greenland
GIMA Alaska
IGPP/LANL Western US

IMAGE Northern Europe
MACCS Canada
Magic Greenland
Measure Eastern US
Tromsø Geophysical Observatory
Pulsation, Finland
SAMNET
SMALL
China
210 Magnetic Meridian