The eruptive activity remains intermittent from some or all of the vents in the main cone at times, although lava emission has continued from the main cone. Elsewhere, at the new secondary cone at the NE of the main cone, there have been several small landslides. There are two main active lava flows, the flow to the north of the flow field near Tajuya attached to previous flows, and a flow to the west of Todoque Mountain covering new land. Seismicity increased significantly, measuring the most daily events recorded since the eruption began. 376 events were recorded, with most being intermediate (10-15 km depth) events although some deep (30-45 km depth) events were recorded, including the day’s largest earthquake which was a mbLg 4.8 event at 37 km depth.

Activity from the summit of the central cone has been minimal today, contrasting with previous days where weak strombolian and phreatomagmatic activity was observed. The lower Hawaiian vents at the base of the northeastern flank that opened in the early hours of the 28th November continue to produce a large but decreased quantity of lava relative to yesterday. These feed a new lava flow covering new land near the northern margin of the current lava field, in the direction of La Laguna. However, the flow is slower and more viscous today, and it is expected to join flow number 8 (the flow nearest the centre of La Laguna) or stop, depending on the evolution of the activity from the feeding vents.

The activity of the eruption remains stable, with a mixed strombolian behaviour showing both jets of ash and also the emission of lava flows. At approximately 3am, a new strombolian vent opened up to the northeast at the base of the main cone, and is producing a slowing moving lava flow heading in the direction of La Laguna. Since the early hours of the morning, there has been increased tremor in the shallow reservoir between 10-14 km depth, with >70 earthquakes peaking at M3.5 being recorded as of 11am. For context, throughout yesterday, only 75 earthquakes were recorded. However, deeper (>20 km) seismicity is lower today.

For the first time since the 20th November, air quality has been sufficient enough to allow the commencement of operations at La Palma airport. The change in air quality is due to a change in wind direction, with dispersion of the volcanic plume now being to the southeast. The lava flow activity remains largely concentrated in the central flows which are widening, as well as in the stream at the south of the flow field which was fed by the inactive vents to the south of the main cone and advances incrementally. Seismicity remains similar to previous days, with 75 events being recorded with most being intermediate (10-15 km depth) events although some deep (30-45 km depth) events were recorded. The day’s largest earthquake which was a mbLg 3.6 event at 36 km depth.

After the changes to the eruption on the 25th, the emission points that opened to the south of the main cone ceased emitting in the early hours of the morning, however the emission point that opened on the morning of the 25th to the east of the main cone remains active and feeding the new flow to the SW of the main cone. This flow has moved through flows 10 and 11 to the south of the flow field and has affected the photovoltaic plant, Las Manchas cemetery and new buildings. Later in the day, a new eruptive focus opened up on the eastern flank of the main cone.

An increase in lava emission was seen throughout the day. Initially, at 9 am local time, a sudden increase was seen from the main effusive focus on the NW flank of the main cone and then at 11 am a new lava flow heading SW was observed emitted from a reactivated emission point to the east of the main cone.

Rain warnings have been issued for La Palma in the coming days, which PEVOLCA has warned could remobilise unconsolidated ash deposits which may form local mass movements and present a hazard to driving, especially in steep areas. Meanwhile, the dispersion of the ash and gas plume continues to be to the E/NE and are unfavourable to the operations of the airport.

The confinement ordered for areas of Tazacorte on the 22nd due to gases from the creation of a second lava delta to the north of the first one has been lifted today, as it was determined there is no further risk to these populations from gases. The extent of the new lava delta is unknown, although the first lava delta continues to grow and is estimated to be 43 hectares.

The advance of flow number 7 culminated in it reaching the sea at 12:03pm local time, where it begins to form a second lava delta north of the first one. In anticipation of this event, a preventative confinement of the four closest neighbourhoods in Tazacorte was ordered due to possible gas emissions, which affected 3,000 people.

The contribution of lava to the active lava flows has been concentrated around flows 4 and 7 which both flow parallel in between La Laguna Mountain and Todoque Mountain, and in the last 24 hours have merged a few hundred metres from the coast, to the SW of La Laguna Mountain. The flows are currently affecting new land which consists largely of banana plantations.