Claim: HAARP causes clouds like the one pictured to form.
Fact-check: The HAARP research facility didn't produce peculiar clouds - Full Fact
Verdict: haarp doesn't produce water in the atmosphere and does not interact with existing clouds, so had nothing to do with the cloud pictured. although the cloud type is slightly rare, it has been categorised for decades and photographed many times.
Organisation: Full Fact
Author: Grace Rahman
Date published: 2023-04-18T00:00:00