Service International des Indices Géomagnétiques
International Service of Geomagnetic Indices

Greenwich (GRW) observatory

IAGA code GRW
Location Greenwich
Country United Kingdom
Open-Close 1836-1926
replaced by ABN
   
Website http://geomag.bgs.ac.uk/operations/greenwich.html
   
Altitude 50 m
see larger map
Geographic coordinates Geomagnetic coordinates
(IGRF-12 2015.5)
Corrected geomagnetic coordinates
(IGRF-12 2015.5)
Latitude Longitude   Latitude Longitude   Latitude Longitude
51.477°N 0°E 53.18°N 84.96°E 47.18°N 77.91°E
 
GRW contributed to aa indices K=9 lower limit 526 nT