VIDEO: La Palma volcano cone part collapses, spews 3-story building-size blocks of molten lava

Spanish authorities said that a new destructive lava flow was being monitored in the island of La Palma. The volcano has been continuously erupting for there for three weeks.

Spain's National Geological Institute (ING) said there were 21 seismic movements detected on Sunday, with the largest measuring 3.8 on the Richter scale, which caused the ground to shake, in the villages of Mazo, Fuencaliente and El Paso.

In a video posted on their Twitter account, giant lava rocks could be seen floating in a large river of lava, moving at high speed.

The Canary Islands Volcanology Institute said the lava flow, with temperatures of up to 1,240 degrees Celsius (2,264 degrees Fahrenheit), destroyed the last few buildings that remained standing in the village of Todoque.

"The collapse of the northern flank of the Cumbre Vieja volcano has caused the release of large blocks of material and the appearance of new flows that run through areas already evacuated," tweeted Spain's National Security Department.

 "The lava has reached the Camino de la Gata industrial estate and new buildings," the agency added.

So far, 1,186 buildings have been destroyed by the continuous eruption of the Cumbre Vieja volcano since it began on September 19, the Canary Islands Volcanic Institute said.

Some 493 hectares (1,218 acres) of land have been engulfed by the lava rivers, said Miguel Ángel Morcuende, technical director of the Canary Islands Volcanic Emergency Plan (Pevolca) organization.

Around 6,000 of La Palma's 83,000 inhabitants have been evacuated from their homes as a result of the eruption. 

Lava creates new land

La Palma is part of Spain's Canary Islands, which is located in the Atlantic Ocean, near northwest Africa. The island's economy depends on the cultivation of the Canary plantain and tourism.

"We cannot say that we expect the eruption that began 21 days ago to end anytime soon,'' said Julio Perez, the regional minister for security on the Canary Islands.

The three-week eruption has already seen lava flows reach the ocean, dumping so much volcanic material that new land was created. Authorities sealed off the maritime area, as the lava's contact with the water released toxic gases.

Government experts estimated that new land being formed where lava is flowing into the Atlantic has reached a surface of 34 hectares.

Scientists have warned that if the new land continues to grow outwards into the sea, parts of it could break off and generate explosions, gas emissions and large waves.