regarding the last sighting:
i asked the kids from my neighbours what they had seen.
and they simply described it as "a silver disc" in the sky.

Originally posted by DimensionalDetective
Did anybody film this? If it was there for an hour, hopefully somebody brought a video or still camera and captured some images. It sounds like you are in a hot-spot for activity.
Have you contacted your local military, airports, or UFO organizations? It's always a good idea to rule out terrestrial causes first....