The world's third largest optical telescope, the 10.4m Gran Telescopio Canarias on the island of La Palma, starts its commissioning observations.
- The Guardian
- Hundreds of firefighters on the Spanish island of La Palma in the Canary Islands are continuing to battle wildfires.
- The Gran Telescopio Canarias, the world's largest reflecting telescope, is inaugurated by King Juan Carlos I of Spain.
- Scientists speaking at a news conference on natural disasters raise the alarm that the Cumbre Vieja volcano on La Palma, Canary Islands, could erupt at any time, sending a 250 km2. rock crashing into the Atlantic Ocean and producing a tsunami that could devastate the Atlantic's coastline, within hours. Very little seismological monitoring of the volcano is being carried out.