La Palma volcano eruption update: eruptive and seismic activity increase
mer., 17 nov. 2021, 19:3119:31 PM | AUTEUR : T
Ash emission from La Palma today (image: Rubén López / @rubenlodi / twitter)
Surface lava flows near the vents (image: Canarias TV webcam)
Seismic trace of TBT station of the quake (black peak; image: IGN)
Volcanic tremor amplitude past 7 days (image: IGN)
After almost 2 months of continuous eruption, there are no signs it might end soon. On the contrary, the activity - both external and internal (seismic) - has continued to intensify today again, with strong ash emissions during extended phases and more surface lava flows near the vent as well as downslope. Volcanic tremor has been increasing, suggesting that the rate of magma flowing towards and erupting at the surface also has become higher again.
Time vs depth of quakes under La Palma during the past days
This new surge of lava reactivated the flow front that stalled between Montaña Todoque and La Laguna. Other flows are active on top of the lava field near the vents, while the bulk of lava seems to be reaching and increasing the new combined lava delta at the coast.
Video of the activity today:
Perhaps most notably, the earthquake activity has drastically jumped up during the past 24 hours. There were more than 100 quakes above magnitude 3 in total, mostly at around 12 km depth, but also two larger quakes of magnitudes of 4.7 and 4.8 at 7.17 a.m. and 12.33 p.m., respectively, both at around 38 km depth.
On the other hand, estimated gas emissions have decreased to 2,000-3,000 tons of SO2 yesterday and 2,000-2,500 tons of CO2. Ground deformation has remained similar as in the past days, but also decreased a bit.
mer., 17 nov. 2021, 15:15
La Palma Volcano Volcanic Ash Advisory: ERUPTION AT 20210919/1410Z ONGOING ASH EMISSION OBS VA DTG: 17/1500Z to 8000 ft (2400 m)
mer., 17 nov. 2021, 09:15
La Palma Volcano Volcanic Ash Advisory: ERUPTION AT 20210919/1410Z ONGOING ASH EMISSION OBS VA DTG: 17/0900Z to 8000 ft (2400 m)