In three hours, at 12:43Z, it will be the #Equinox; #Autumnal in the #NorthernHemisphere and #Vernal in the #SouthernHemisphere. It's marked by the #Sun being directly overhead at the #Equator at local #Noon, or somewhere in the eastern #AtlanticOcean this time, Here, there has been persistent heavy rain all morning and it presages the transformation to #Autumn.
The #September #Equinox will occur in about 15 minute from now (06:49Z) when the #Sun will be directly overhead about the #Equator at #midday somewhere over the #IndianOcean. #Autumn begins for people on this half of the world and #Spring for the other half.
Today, the #equinox will occur at about 21:24Z -- just over twelve and a half hours from writing this. It marks the moment when the #Sun is directly overhead at #Noon at the #equator. Given the time it will occur, the event will take place over the #PacificOcean, around 142.5°W. It marks the start of #Spring in the #NorthernHemisphere and #Autumn in the #SouthernHemisphere.
The #equinox will occur later today, in about four hours from now. It marks the beginning of #spring in the #NorthernHemisphere and #autumn in the #SouthernHemisphere. It is marked by the moment the #Sun is overhead on midday somewhere on the #Equator. Given its time this year, it'll be somewhere over the #IndianOcean (15:33Z).