Jupiter Thunderbolt is one of Sailor Jupiter's first attacks in the reprint version of the manga and second anime, and one of her attacks in the live-action series.
In order to perform this attack, Sailor Jupiter needs to call upon the planet Jupiter to bring down an incredibly powerful thunderstorm, which is collected from the sky into the antenna of her tiara. They materialize in her hands and then she hurls a huge bolt of whitish electricity.
In the original version of the manga, Sailor Jupiter's first lightning attack did not have a name, but appeared similar to Supreme Thunder. It was given this name in the reprint of the manga, possibly to bring it in line with the attacks in the live-action series. It was only used once, in Act 5, in order to destroy Nephrite.
Pretty Guardian Sailor Moon
In the live-action series, Jupiter Thunderbolt was Sailor Jupiter's special attack using her Sailor Star Tambourine. To perform it, she would wave her Tambourine in a circle to charge it up, tap it against her palm, then point it at her target to send a powerful lightning bolt their direction. It was only used twice in the series: first in Act 26, in conjunction with Moon Twilight Flash in order to destroy one of Nephrite's Youma, and again in Act 48 against Metalia Endymion.
CrystalThe attack was only used once in Act 5 to attack Nephrite and his youma; the latter was destroyed by the attack.
The way Sailor Jupiter uses this attack in PGSM is similar to Sparkling Wide Pressure in the first anime.