A better title: "Lusi's 8th birthday - A giant mud volcano in Java"

(The idea is to maintain the original title, but sometime it's better to add more information, without editorializing.)

That's right, as long as the words are taken from the article itself, such as here, where the first sentence includes the extra info.

The submitted title ("Lusi's 8th birthday – Journal – Agile Geosceience") also included the domain name, which is redundant since that is always displayed beside the title and implicitly forms part of it.