Three different ways women orgasm including one called the volcano

WOMEN orgasm in three different ways, culminating in a rare eruption dubbed the volcano, scientists say.

Experts used a smart sex toy to monitor the trembling pelvic floor during a female climax.

The most common orgasm was the “wave”, with the woman riding a succession of pleasurable ebbs and flows.

Less frequent was the more powerful “avalanche”, a torrent of larger contractions that gradually ebb away.

Rarest was the “volcano”, the Krakatoa moment famously faked by Meg Ryan in 1989 romcom When Harry Met Sally — a sudden explosive orgasm that can leave onlookers stunned.

Professor James Pfaus, of Charles University in Prague, said the names describe how the “pelvic floor movements appeared during the build-up and the release of tension at orgasm”.

Some 54 women in the study used a Bluetooth-connected vibrator called the Lioness which provides ­instant orgasmic feedback

Prof Pfaus said the device can help millions of women who struggle to climax.

He told the Journal of Sexual Medicine: “It is in the hands literally of the client/patient, and does not require constant monitoring by a therapist.

“The feeling of greater personal control often leads people to be able to let go into an orgasm.”