The Russian government has ordered the evacuation of North Pole-40 Arctic Station.
Prime minister raises the issue on sidelines of the Asia-Europe Meeting (ASEM) in Ulaanbaatar.
Epicentre in Republic of Khakassia, but tremors were felt over a wide area including Krasnoyarsk city.
A criminal case into possible negligence was opened after the Mi-8 crashed in a mountainous area of Khabarovsk region.
Premier Dmitry Medvedev launches inquiry into the tragedy which leaves almost 600 injured.
Pilot error, technical malfunction and bad weather are all possible causes checked by investigators.
Environmentalists call for World Bank to halt funding for projects that could alter flow of rivers leading into lake with water nearing critical low.
Russian President to 'personally' monitor situation amid fears projects could alter river flows and harm Baikal eco-system.
Forest infernos will be extinguished by the weekend, pledges government, as wildfires become political issue in Moscow.