The massive blackout that affected the European countries of Spain, France, and Portugal on April 28, 2025, tested the resilience of various infrastructures, including the Bitcoin (BTC) network.
The lack of electricity impacted millions of users and households, causing conflicts in telephone networks, internet access, as well as in public transportation, flights, operations in hospitals, banks, and traditional businesses, among many others. In this context, Pedro Sánchez, the Spanish president, explained that the authorities are investigating the causes and that "no hypothesis is ruled out." Additionally, António Costa, the president of the European Council, specified that "there are still no indications of a cyberattack. And how did this blackout affect Bitcoin?"
The blackout in those European countries led to Bitcoin miners operating there having to cease their activities, given the lack of connectivity to the power grid and the internet.
According to data from the Czech mining pool Braiins, the computational power (hashrate) of the Bitcoin network recorded a slight decrease compared to April 27, from 822 EH/s (exahashes per second) to 807 EH/s. However, this decline does not seem to be largely linked to the massive blackout in Europe.
