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AURORA Section, Bulletin No.3 -2- OBSERVING THE AURORA New observers should gain experience by searching the sky for aurora whenever taking part in outdoor astronomical observing. Presence or absence of aurora, area of the sky covered, brightness, and colour, will form the basis of your initial reports. The torus of aurora can be classified with more experience. Eventually, the elevations of the forms of aurora in the sky can be measured along the magnetic meridian. For recording aurora, the sky has been divided into four quadrants. The most important quadrant for your observations is the one centred on your north and extending from NW to NE at the horizon up to the zenith (Figure 2). Each quadrant has been divided into three zones, frau 0 to 30° elevation, 30° to 60°, and fran 60° to the zenith. In reporting, you should note the quadrant and zones containing glows, lower borders of arcs and ends of isolated rays ù An illustration of this procedure is shown in figures 1 and 2. TIME OF OBSERVATION Observations should be made approximately on the hour whenever no aurora is in the sky or whenever only quiet forms such as the glow or a faint homogeneous arc are present. How- ever, when an arc begins to show sane signs of becoming active (greatly increased bright- ness or the appearance of motion or rays) the display should then be observed half hourly. It is important that observations be collected from many locations to chart completely the course of an auroral display. Thus a single report of the presence or absence of aurora from Winnipeg may fill a gap left by a Regina observer not able to make an observation. Even if you can not report regularly, your occasional reports will be most helpful. Contribute as much data on the report form as your experience allows. If a report originating in London states that aurora occurred low in the north between 20 hours (8 PM) and 23 hours (11 PM) on March 10/11, 1965, this may confirm another ob- servation from north Toronto where sane uncertainty existed about the observation. Upon request, the Auroral Centre, National Research Council, Ottawa 2, Ontario, will forward to interested observers a supply of report forms, mailing envelopes and a complete set of observing instructions. I am anxious to contact representatives of local Centres concerning the accumulation of duplicate copies of visual aurora reports so that an independent R.A.S.C. survey can be made over the next eleven-year sun-spot cycle. Earl Milton, National Co-ordinator, Aurora Section, 2 Spence Street, Apt. 12, September 1965. REGINA, Saskatchewan.