This is how the lava of the Cumbre Vieja volcano bubbles up 0:39
(CNN) -
Blocks of molten lava the size of three-story buildings rolled down a slope on the Spanish island of La Palma as a series of tremors shook the ground on Sunday, three weeks after the volcanic eruption.
21 seismic movements were recorded this Sunday, the largest of which was of magnitude 3.8, according to the National Geological Institute (ING), and shook the ground in the towns of Mazo, Fuencaliente and El Paso.
The red-hot blocks of magma that descended the slope of the Cumbre Vieja volcano were the size of three-story buildings, the Geological and Mining Institute of Spain reported Sunday.
On Saturday there was a partial collapse of the cone near the mouth of the volcano, Stavros Meletlidis, a spokesman for the ING, told Reuters.
"The collapse of the north flank of the Cumbre Vieja volcano has caused the detachment of large blocks of material and the appearance of new flows that flow through areas already evacuated," tweeted the Department of National Security of Spain.
"The lava has reached the Camino de la Gata industrial park and new buildings," he added.
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Drone footage shows hot lava from the volcano on La Palma spilling into the sea
Lava flows after part of the cone of the Cumbre Vieja volcano collapsed on October 10 on La Palma.
People watch the volcano spew lava, ash and smoke on October 10.
What the lava has destroyed
Rivers of lava have destroyed 1,186 buildings since the Sept. 19 eruption, according to the Instituto Volcánico de Canarias.
Likewise, the lava has devastated 493 hectares of land, according to Miguel Ángel Morcuende, technical director of the Canary Islands Volcanic Emergency Plan (Pevolca).
Some 6,000 people evacuated their homes on La Palma, which has about 83,000 inhabitants.
Lightning was seen early Saturday near the eruption.
A study published in 2016 by the journal Geophysical Research Letters found that lightning can be produced during volcanic eruptions because the collision of ash particles creates an electrical charge.
La PalmaLavaVolcano
