Emma Sharples, a meteorologist from the UK's Met Office, told the BBC the cloud formation actually was not unusual.
But Pacheco's timing was exceptional, capturing a lower cloud as it caught the sun's scattered light, just as it was making contact with a higher cloud.
"I think the presence of a rising sun has made (it) appear more striking than the clouds alone would appear," Sharples said.
"We think they are probably cumulus clouds (cauliflower-shaped and fluffy), so pretty common, but enhanced by the light conditions."
This article originally appeared on DiscoveryNews.com