* Sterling falls 8 pct to low since Plaza Accord
* Safe-haven yen rallies, dollar drops below 100.00 yen
* Dollar index up 3 pct, biggest daily gain since 1978
* Euro/Swiss at lowest since August
* Emerging market currencies battered
By Ian Chua and Hideyuki Sano
SYDNEY/TOKYO, June 24 (Reuters) - Sterling suffered its most volatile session in living memory and hit its lowest level since the 1985 Plaza Accord as Britain voted to leave the European Union, triggering a rush into safe-havens such as the yen and the dollar.
The euro also dropped more than three percent against the dollar while the Swiss franc firmed along with the yen, though the wild moves made traders wary of intervention by Group of Seven countries.
"The markets are in a panic after optimistic swings yesterday. People are selling the pound and anything that is close to it while buying assets that are remotely related to the pound as possible, such as U.S. Treasuries and the yen," said
Ayako Sera, market economist at Sumitomo Mitsui Trust Bank.
The pound fell more than 10 percent to $1.3300 GBP=D4 , its cheapest level since September 1985, when five major economies at the time agreed to weaken the dollar. At 0345 GMT, it was hovering at $1.3509.
"It is wild," said Shane Oliver, Head of Investment Strategy and Chief Economist at AMP Capital in Sydney.
"There is still a way to go yet," Oliver added. "Even if the vote is to leave, there is a lot of water to go under the bridge before Britain actually leaves the EU. We don't know what sort of deal they are going to cut with the EU."
Against the yen, sterling ricocheted between 133.65 and 160.10 GBPJPY=R and was last at 136.11, down a massive 13.8 percent on the day.
The euro rose 8 percent to 82.86 pence EURGBP=R , hitting its highest level in more than two years.
Yet the euro was under pressure against most other currencies as investors fret Brexit could spark anti-establishment movements in other European countries, some of which have already seen decline in traditional political parties.
The referendum results fanned worries that it could lead to further discontent among European integrations and rise towards nationalism or regionalism, with an election re-run planned in Spain on Sunday after an inconclusive election last December.
The euro fell 3.6 percent against the dollar to $1.0975 EUR= , a low last seen in March.
The plunge in European currencies lifted the dollar index =USD 3 percent, which, if sustained, would be its biggest daily gain since 1978.
The sharp moves raised worries that global policymakers may take action to support the pound.
"We need to be careful about intervention in such a case. I think there's more than enough excuse for G7 to intervene," said Koichi Yoshikawa, executive director of finance at Standard Chartered (LON:STAN) Bank.
As Brexit anxiety grew, so too has demand for the safe-haven yen, which jumped on the greenback and euro.
The greenback dropped to 99.00 yen, a fall of 6.7 percent, before gaining a semblance of stability at 101.50 yen, the first time it fell below the 100 mark since late 2013.
The euro fell to as low as 109.50 yen EURJPY=R for the first time since late 2012.
Japanese Finance Minister Taro Aso declined to comment when asked about the possibility of joint G7 intervention. safe-haven Swiss franc also gained against the euro, which fell to 1.0685 franc EURCHF=R , its lowest since August.
The Australian dollar, often sold off in times of heightened market stress, fell more than 3.6 percent to $0.7346 AUD=D4 .
Emerging market currencies were also sold heavily. The South African rand fell over seven percent ZAR=D4 while the Turkish lira fell more than 4 percent TRYTOM=D3 .
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Live results
http://tmsnrt.rs/1Ke31H Britain and the EU
http://tmsnrt.rs/28QKboK Market reaction
http://tmsnrt.rs/28QKdwV
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^> (Additional reporting Rebecca Howard in Wellington; Editing by Eric Meijer and Sam Holmes)