According to Hashrate Index's October report (describing Q3 observations), the United States, Russia, and China continue to account for approximately 66% of Bitcoin mining hashrate. Specifically, the U.S. hashrate decreased from 345 EH/s to 335 EH/s, with its share dropping from 36.7% to 35.6%; Russia's hashrate increased from 162 EH/s to 170 EH/s, with its share rising from 17.2% to 18.1%; China's hashrate decreased from 115 EH/s to 110 EH/s, with its share falling from 12.2% to 11.7%. The combined share of these three countries decreased by approximately 0.8%, while the estimated global hashrate remained largely stable.