During 4-5 October tremor levels fluctuated. The southernmost lava flow had reached 1,800 m elevation in an area 1.5 km NW of Nez coupé du Tremblet. The cone had grown to around 12 m tall and 43 m wide at the base.ĭuring 3-4 October the ejection of lava above the cone became less intense, and the new smaller cone was only weakly active. Sulfur dioxide emissions continued to increase and were about 2,500 tons per day on 3 October. Gas plumes drifted SW during 2-3 October. A more significant sulfur dioxide plume was identified in satellite data the next day, drifting as far as 400 km. A well-defined gas plume, denser than those seen during previous days, was identified in a 30 September satellite image drifting 300 km NW at an altitude of 3 km (10,000 ft) a.s.l. Sulfur dioxide emission estimates derived from satellite data had increased from about 610 tons per day on 28 September to 1,525 tons per day on 1 October. The volume of erupted lava was 2.6-5.4 million cubic meters by 30 September peak discharge rates reached 20 meters per second at times. The vent at the top of the cone widened and a new, smaller cone formed on the S flank and produced lava flows. Tremor levels and gas emissions also began increasing on 29 September and remained at high levels during the rest of the week. Lava discharge rates were likely underestimated due to measurements hindered by weather conditions or flows obscured by tubes. Average daily lava flow discharge rate estimates had a mean value of 8 meters per second at the beginning of the eruption but then stabilized at 2-4 meters per second the flow rate increased during 28-29 September to more than 6 meters per second. By 28 September the cone had grown to just over 8 m tall and around 27 m wide at its base.
Lava flowed from the base of the cone in two main branches, to the SE and E, mainly through lava tubes, as far as 3 km. The cone ejected lava to low heights above the rim. OVPF reported that the eruption at Piton de la Fournaise that began on 19 September was ongoing at a cone adjacent to the SW flank of Piton Kala Pélé during 28 September-4 October.
Most Recent Weekly Report: 28 September-4 October 2022 Cite this Report
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