Authorities warned the public to exercise caution in areas surrounding the flow field due to volcanic gases in the area and noted that lava flows, although cooling, remained at high temperatures. Even though air quality levels had improved overall, a few measurements of diffuse carbon dioxide emissions showed levels around 9 times average background. Sulfur dioxide levels varied between extremely low and medium values (less than 5 to 999 tons per day) consistent with a cooling and degassing lava flow field. Small collapses from the walls of the main and secondary cone craters were visible through the week. Sporadic gas emissions rose from the vents and from cooling lava flows. During 15-20 December tremor levels were at background levels and seismicity was very low at all depths. Observations at La Palma on 15 December showed no lava flowing from vents at the W base of the main cone, from tubes, or at the lava delta in the Las Hoyas area. Most Recent Weekly Report: 15 December-21 December 2021 Cite this Report
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