La Palma volcano eruption: Warning signs may have been there for years

The eruption of Cumbre Vieja volcano, La Palma, 19 September AcfiPress/NurPhoto via Getty Images
After half a century of peace, the Cumbre Vieja volcano in Spain's La Palma island came back to life Sunday. On 21 September, more than 100 hectares had been covered by lava flows, which destroyed more than 180 houses and forced 6500 people from their homes.

After mini-earthquakes on September 9-19, followed by land bulging upwards of more than 10 cm, evacuation plans were initiated in the affected areas. However, there are signs of an eruption.