Each morning and for two hours, one of Europe’s largest supercomputers processes data from the eruption of the Cumbre Vieja to make short and mid-term predictions. This science is known as Urgent Computing. Since it started on Sept. 19, the eruption on the Spanish island of La Palma shows no signs of stopping. Scientists say it could last up to three months. Housed inside a deconsecrated chapel, part of the Catalonia Polytechnic University (UPC), MareNostrum 4 is Spain’s largest supercomputer. It was named after the ancient Roman name of the Mediterranean Sea and was first booted up in April 2005. At 8 a.m., the predictions are ready for senior researcher Arnau Folch to analyze. From them, he writes a daily report sent to the Plan of Volcanic Emergencies of the Canaries, Pevolca. But this isn’t the first time that MareNostrum has been used to analyze such geological events. “Here at …