La Palma volcano eruption update: lava effusion and quake activity remain high, but first signs of hope from deflation

Fri, 22 Oct 2021, 16:34
16:34 PM | BY: T
Ash emission and lava spattering at La Palma this afternoon (image: Canarias TV live stream)
Ash emission and lava spattering at La Palma this afternoon (image: Canarias TV live stream)
Map of recent quakes under La Palma, past 3 days (image: IGN)
Map of recent quakes under La Palma, past 3 days (image: IGN)
Ground deformation at LP03 station (image: IGN)
Ground deformation at LP03 station (image: IGN)
Current seismic signal LP01 station (image: IGN)
Current seismic signal LP01 station (image: IGN)
The eruption continues with activity fluctuating between more and less intense phases at the vents. Near-constant fountaining form the summit vent at the cone produces dense ash emissions that rose to approx. 2,800 m today, while lava spattering and lava flow effusion can be seen from the lower vent.
However, most lava is likely invisible at the vents as it is going directly into a system of underground lava tubes that have formed with time and transport it to various areas of the active flow field, which continues to advance slowly at various fronts, mostly along its northern margins.
Volcanic tremor levels remain high, suggesting that the magma rate as well continues to be very high, estimated to be around 60-70 cubic meters a second.
Volcanic earthquakes continue to increase if not in size but in numbers; during the latest 24-hour period, the National Geographic Institute (IGN) detected 135 earthquakes under the island, 14 of which were felt by people. The strongest quake was a magnitude 4.4 event at 11.54 p.m. last night, while another quake of magnitude 4.2 occurred earlier this morning. Both of these stronger ones were in the deeper layer between 35-40 km depth. Most other quakes were under the center of Cumbre Vieja at around 12 km depth “as usual”; this area is believed to be where the magma is stored before rising to the erupting vents.
Ground deformation is now showing a decreasing trend, which is a good sign as it should indicate that the eruption of magma now outpaces the supply from depth, and maybe can be taken as careful indicator that the peak of activity has been passed.

Video of the lava flows in La Laguna earlier today, taken by a drone of the government:

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