(Adds data and pricing from research group, background and comment from mining association, paragraphs 8 to 12)
* Debbie knocked out 11.5 mln tonnes of metallurgical coal - Noble
* Chinese steel makers scramble to replace Australian coal
* Alternative supplies mostly come from the U.S, but also Russia
* Australian disruptions to push up coal prices - ANZ
* Coking coal futures spike: tmsnrt.rs/2nVCEPj
By Henning Gloystein
SINGAPORE, April 4 (Reuters) - China, the world's biggest coking coal importer, is scrambling to cover Australian supply disruptions after Cyclone Debbie knocked out mines and rails by turning to an unusual source: the United States.
Debbie, which hit Australia's Queensland state last week, caused the evacuation of several mines and damaged coal trains supplying export terminals, triggering two miners - Yancoal Australia and QCoal - to declare force majeure on its deliveries. With other miners like BHP Billiton and Glencore also affected by the storm's fallout, more disruptions may follow.
Force majeure is a commercial term that means a buyer or seller cannot fulfill their obligations because of outside forces. It is typically invoked after natural disasters or accidents.
Australia is the world's biggest coking coal exporter and is China's largest supplier. With markets there closed on Monday and Tuesday, its steel makers are clambering to find alternative supplies.
"Markets may be closed Monday and Tuesday but there's certainly activity. The Chinese are fixing cargoes from the United States in order to replace the shortfall from Australia," one coal trader with knowledge of the matter said, speaking on the condition of anonymity as he was not cleared to talk about commercial deals.
"More will make its way from the U.S. to China very soon," he said.
It was not immediately clear which American miners were providing the supplies but Thomson Reuters Eikon data shows that China already has imported more than 500,000 tonnes of U.S. coking coal in 2017, ending a two-year stretch when no coking coal was shipped between the two countries.
More than 427,000 tonnes of U.S. met coal imports were counted in February by the Chinese government that likely arrived in January, said Chuck Bradford of Bradford Research, Inc, who has access to the data. The coal sold for nearly $190 per tonne, he said.
Arch Coal Inc did not immediately respond to a query on whether it had exported the coal to China this year.
George Dethlefsen, Corsa Coal Corp's chief executive, said his company has been overwhelmed with inquiries for cargoes over the past few days from customers in Asia.
"Right now we, like everyone else, are trying to figure out what tons are available and what we can produce to fulfill potential new orders," he said.
Alpha Natural Resources, which emerged from bankruptcy last year, declined to comment.
President Donald Trump has promised to revive the U.S. coal industry and issued an executive order last week to dismantle former President Barack Obama's regulations on the sector.
Luke Popovich, a spokesman for the National Mining Association trade group, said it was not clear that the demand had any link to the administration's push to axe regulations.
"Whether or not this can be related to the executive order we're nevertheless grateful and not looking a gift horse in the mouth," said
China will require more coal, as the Australian outages far outstrip what is immediately available from the United States.
"The minimum impact over the coming weeks we would expect would be in the region of 14 million tonnes of coal (11.5 million metallurgical, and 2.5 million tonnes thermal)," said Rodrigo Echeverri, head of energy coal analysis at commodities trading house Noble Group, adding that the current estimate was for the outages to last around five weeks.
Shipping data in Eikon shows that around 70 ships are waiting to load coal off the Queensland ports of Abbot Point, Mackay, Dalrymple Bay, and Hay Point.
The outages caused Australian coking coal futures on the Singapore Exchange on Monday to spike by over 25 percent to $197 per tonne, the biggest one-day move ever.
China has recently turned to Russia for more coking coal, with imports rising to over 400,000 tonnes in February from 275,000 tonnes in December.
Mongolia and Indonesia are other potential sources of coking coal for China, three coal traders said. Anthracite coal shipments from North Korea to China, also used as coking coal, have dried up after Beijing ordered an import ban following missile tests of its isolated neighbour.
Overall, traders said it was unlikely that all of China's near-term demand could be met without Queensland supplies, likely requiring inventory drawdowns, which will push up prices.
"With a significant amount of the world's premium hard coking coal now marooned onsite, prices are likely to continue to push higher," ANZ said.
Reporting by Henning Gloystein, additional reporting by Timothy Gardner in Washington; Editing by Christian Schmollinger