The mean amplitude of the volcanic tremor remained at very low values for this eruption until 15:00 UTC yesterday and subsequently practically zero between 15:00 and 17:00 UTC. From that moment the volcanic tremor began to increase considerably. This morning, due to the increase in the explosive eruptive activity IGN has issued a new VONA (Volcano Observatory Notice for Aviation) communicating the increase in the emission of ash, as well as the increase in the height of the ash cloud, which has reached 7000 m in height (IGN, 2021). Lava fountains fed a new, fast-moving flow. The leading edge of the main flow continued to advance Westward, igniting a fertiliser storage producing explosions and a brown odorous plume (GVP, 2021). Late in the day lava flows descended a cliff and reached the ocean at Playa de los Guirres producing black-and-white plumes (GVP, 2021).