During this period the moon reaches its full phase on Saturday May 18th. At this time the moon lies above the horizon all night long, making meteor observations difficult at best. As the week progresses the moon's phase will wane and it will rise later each night. This will provide some dark skies between dusk and moon rise but unfortunately this is a very slow time for meteor activity.
During this period the moon reaches its first quarter phase on Saturday May 11th. At this time the half-illuminated moon is present in the evening sky and does not set until 3-4am as seen from mid-northern latitudes. As the week progresses the window of dark skies between moonset and dawn will shrink until it disappears by Wednesday May 15th.
During this period the moon reaches its new phase on Saturday May 4th. At this time the moon is invisible at night and poses no problems to meteor observers. As the week progresses the slender crescent moon will enter the evening sky but will set long before the more active morning hours arrive.
The eta Aquariids (ETA) are active between April 17 and May 24. The strongest activity is usually seen near May 7, when rates can reach 25-30 meteors per hour as seen from the tropical areas of the Earth.
During this period the moon wanes from nearly half-illuminated to almost new. This weekend the waning crescent moon rises during the early morning hours and will be a nuisance to meteor observers. It's not overpowering like a full moon so by simply keeping the moon out of your field of view you can still view decent meteor activity during the morning hours. As the week progresses the slender moon will be a non-factor and one can view wherever they wish in the sky.
During this period the moon will reach its last quarter phase on Friday April 26th. This weekend the nearly full moon will lie above the horizon nearly all night long. The glare from the bright moon will make meteor observing difficult at best. The lunar glare will obscure all but the brighter meteors. The glare will lessen which each passing night but will still be a hindrance all week long.
Last night was a busy night for the AMS: 2 very bright fireball events occurred less than 6 hours apart: one over Germany and one over Delaware (see from Washington DC, Maryland, North Carolina, New Jersey, Pennsylvania, South Carolina, Virginia, West Virginia and Delaware).