Shards have sprouted all over the portal network. Well, 3 places at least. And we have a map! This handy tracking map will help you follow the shards as they make their way around the planet. Thanks to volunteer effort to record shard movements, this should remain up to date throughout the Avenir event, although agents may see some delay while the data is gathered.
Of course, mere hours after Not Niantic got this going, Niantic themselves also put a map up, but as they say, imitation is the sincerest form of flattery. So thank you Niantic for paying us this compliment.