La Palma eruption update 5th october 2021: 420 hectares now covered by lava flows

La Palma eruption update 5th october 2021: 420 hectares now covered by lava flows

Daily summary

The two effusive vents that opened a few hundred metres NW of the main cone on the 1st October no longer show any activity, according to PEVOLCA. However, the Strombolian vents in the main cone and those on the flanks of the main cone are still active. Activity in the fumarole field on the SE flank has decreased, although gas emission and high soil temperatures have been observed 100 m NW of the newly inactive vents. It is noted that no eruptive parameters indicate the eruption could be near its end. The active lava flows predominantly travel from the main cone to the lava delta, which is now 36 hectares in size, via lava tubes. The lava flows travelling on top of the existing lava flows also remain well contained and as such there is currently limited widening of the area affected by the flows. Latest assessments indicate 420.12 hectares are covered by lava flows, with the lava flow field being a maximum of 1,250 m wide. Assessments of the marine environment have indicated that physio-chemical parameters of the sea water have only been affected between 0-250 m depth, within 500 m of the front of the lava delta.

The meteorological conditions remain favourable in terms of air quality, and this is reflected in SO2 and PM10 concentrations. Low concentrations of both SO2 and PM10 particles and PM10 have been observed across the network. Regarding deformation, the distal stations still show a slight downward trend, although vertical stability is now seen in the proximal stations. Earthquake activity continues to be concentrated near where the precursory seismic swarm began on the 11th September. 48 earthquakes were recorded, peaking at 3.9 mbLg. The ash plume height was 4000 m, and the SO2 emissions were decreased, at 5,849 tons per day.

A map showing the size, location, time and depth of earthquakes registered on La Palma

A map of earthquakes on La Palma over the last 3 days. The majority of the earthquakes have been concentrated in the upper reservoir (10-15 km depth) with smaller amounts in the deeper reservoir (30-40 km depth). Image credit: IGN Spain

Sources: Government of the Canary Islands, PEVOLCA, Involcan, IGN, DSN, Cabildo La Palma, 112 Canarias, Tolouse VAAC, Copernicus EMS

Lava flows


Exclusion zone map

Exclusion zones shown here have been approximated from press releases from the Cabildo de La Palma and will not be exact, nor claim to be official maps of the exclusion zones. For official information, please contact the Cabildo de La Palma.

Official social media

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News articles

  • Guardian – volcanoes are life – how the ocean is enriched by eruptions – here
  • El País – How lava from La Palma turn a beach into the newest territory on earth – here

To see our full news archive, visit our open data section or click here.

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Eruption footage

News and Interviews

Witness Testimonies

Interactive Lava Flow Map

Notes: Use the button in the top right to open the map into full screen mode. Use the legend icon in the top left to see the legend and further information about the map. Click on individual days to see an outline of the lava flows on that day.

Interactive Earthquake Map

click here to enlarge

Notes: The size of the points represents the size of the earthquake, and the colour represents the depth. The map will also only show a certain number of points at once. For ease of use, we recommend you uncheck all dates and the satellite basemap from the legend in the top right, and inspect the earthquakes one day at a time.

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