Widespread fear that Japan's nuclear crisis could send radioactive fallout Russia's way is proving a nightmare to public officials in the Pacific regions, but a bonanza for merchants selling everything from face masks and iodine to vodka and wine.
Residents also are stocking up on dosimeters, a device for measuring the total absorbed dose from exposure to ionizing radiation, and seaweed, which contains natural iodine.
Health experts are insisting the radiation threat is minimal and warning that an excessive intake of iodine is not only useless but could even be harmful.
No increase in exposure levels in the region has been reported since the tsunami-damaged Fukushima nuclear power plant began releasing radiation. The plant is about 950 kilometers (600 miles) east of Vladivostok, a major port and the largest city in the Russian Far East.
Even if a reactor at Fukushima explodes, "there is no danger for Russia's Far East," the head of Russia's atomic energy agency, Sergei Kirienko, told Prime Minister Vladimir Putin on Tuesday. Prevailing winds would likely send fallout from a blast out over the Pacific Ocean.
On Wednesday, more assurances were forthcoming. Alexander Ivelsky, an Emergencies Ministry spokesman in Sakhalin, immediately north of Japan, insisted "there is nothing to be afraid of" and that Russians should trust official announcements.
Alexander Molochkov, dean of the physics department at the Far Eastern Federal University in Vladivostok, said "Russian nationals should feel completely safe."
But many Russians are wary of official assurances, apparently remembering the secrecy and dissembling that followed the Chernobyl nuclear power plant explosion in 1986 or still plagued by Cold War-era fears.
"Some people are just freaking out," Pyotr Laduzhin, a computer engineer in Vladivostok, told The Associated Press in a message. "It's an old Soviet fear of a nuclear attack."
He added he has been measuring radiation using a meter he bought in 2007, shortly after North Korea tested its nuclear weapons.
"I feel safer when I see with my own eyes that radiation is normal," said Laduzhin.
Companies dealing in dosimeters, iodine and face masks are stirring fears to boost sales, said Olga Shekhovtseva, an Emergencies Ministry spokeswoman in the mainland Primorsky region. "It is a pity that certain businessmen are trying to profit on the situation," she told AP.
Clerks at pharmacies throughout Vladivostok say they sold out all medical drugs containing iodine, as well as face masks and gauze.
But a representative of the Primtekhnopolis, which sells radiation gauges costing upward of $100, claimed it had been actively trying to dissuade customers from panic purchases.
"We're trying to talk them out of buying them, saying they don't need them, but it's all to no avail," said Vitaly Aldanov. "They're buying them anyway."
Russian media, meanwhile, reported a spike in sales of vodka and red wine on Sakhalin.
Some Russians believe that by consuming vodka they can stave off ills, while red wine is considered to increase red blood cell production, boosting the immune system. Soviet authorities recommended red wine to boost the body's defenses against radiation following the Chernobyl disaster.
But others favor fleeing altogether. Airlines say they have sold out of tickets from the Russian Far East to Moscow and other parts of western Russia.
"I am going to send my wife and children to their relatives in (the western city of) Voronezh," Vladivostok resident Dmitri Starichenko said. "I can't leave myself because of work, but I'm worried about them."
There is calm in some quarters, though.
"I am not afraid," said Mikhail Glumov, a computer network administrator in Vladivostok. "This is nonsense blown up by the media _ just like swine flu or atypical pneumonia."
Mansur Mirovalev contributed to this story from Moscow.
(This version CORRECTS Corrects spelling of "iodine," updates with quotes, details. Changes dateline, byline. Adds contributor note.)