Reporting Noctilucent Cloud

Amateur observations of NLC remain of great value to professional scientists studying upper-atmosphere phenomena. Formal reports should always include the following information. Observer's Location Date Time (UT) NLC details A typical NLC report will look similar to the sample NLC report' below. Reports should be sent to your local organisation.

Observer's Location

Give your name and the latitude and longitude of the place observations were made. Alternatively, give the name of the nearest town or city.


Use the "double-date" convention. That is, "June 21-22" would refer to the night of the 21st through to the early hours of the 22nd, irrespective of which side of midnight the NLC appeared.


Always use universal time (UT) which is based on the Greenwich meridian at 0 degrees. Locations east and west of Greenwich will have to make the simple conversion to UT, always remember to make appropriate adjustments for any daylight saving time which may be applied to your civil time zone.

NLC Details To Include In Reports

All the above details should be combined with your visual and/or photographic observations and sent to your local organisation.

Sample NLC report

Name:Your name
Date:Double Date
(eg, 2014, 06, 21-22)
Time (UT)StructureElevationAzimuthBrightnessNotes
00:30I,IIab,IIIab10345-0251In patchy cloud.

Where To Send Reports

No official Internet location receives NLC reports on a formal basis. Nonetheless, reports can be sent to this site and will then feature in our progress reports over each season. However, always ensure that your original, full-detailed reports are sent to your local organisation.  A number of organisations exist across the USA/Canada and Europe - if you have problems finding an organisation for your locality please contact us here and we'll try to help.
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