A strong storm swept across North America over the weekend and caused Bitcoin (CRYPTO: BTC) miners to shut down throughout the United States.

Data from BTC.com shows that between Dec. 21 and 24, the Bitcoin mining hashrate – a measure of computational power on the blockchain – decreased by approximately 100 exahashes per second (EH/s), or 40%, to 156 EH/s.

As of Dec. 25, it had returned to an average of 250 EH/s.

Curtailment is a technique that is promoted as a way for miners to support electrical grids.

When demand from other sources is high, such as during winter storms, power providers may shut down due to the constant demand from miners while still making enough money to cover expenses.

An arctic storm that affected the U.S. and Canada caused temperatures in western Montana to drop as low as negative 50 degrees and up to 43 inches of snow to fall in western New York, acording to the BBC. 

CNN reported the storm has claimed at least 37 lives.

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Foundry USA Suffers Biggest Loss

The largest mining pool in the U.S., Foundry USA, suffered the most loss of any significant pool on Dec. 23 when it lost more than half of its hashrate, according to data from the information platform Mining Pool Stats.

Some of the largest American miners reduced production, including Riot Blockchain (NASDAQ:RIOT) and Core Scientific (NASDAQ:CORZ), which is undergoing Chapter 11 bankruptcy proceedings.

According to a LinkedIn post by Lee Bratcher, the founder and president of the Texas Blockchain Council, 99% of the industrial-scale Bitcoin mining load in Texas was shut off at 6 a.m. on Saturday.

The curtailment of miners is evidence that they are supporting the electric grid, according to Dennis Porter, an advocate for the sector through the nonprofit Satoshi Action Fund.

Bitcoin miners have once again voluntarily shut off power during an extreme weather event in Texas.

Bitcoin miners are good for the grid. pic.twitter.com/kpCzkZVeRM

— Dennis Porter (@Dennis_Porter_) December 24, 2022

A miner based in Europe named Denis Rusinovich tweeted that the sharp decline in computer power is "Another indication that Bitcoin's geographical heterogeneity is crucial."

Bitcoin miners will need to be meteorologist nowdays as well.
Severe winter weather in North America impacted the biggest mining pool Foundry with approx 20 EH being switched off.
Another confirmation that bitcoin's geographical diversification is vital! pic.twitter.com/snk36JX0w1

— Denis Rusinovich (@DenisRusinovich) December 25, 2022

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