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Data from the two ScanningDOAS instruments deployed at Cleveland volcano are archived at the Cascades Volcano Observatory. To view the time-series data for these stations, select ‘Gas’ > ‘Scanning DOAS’ in the left-hand menu.
  • The CLNE ScanningDOAS was operational from September 2022.
  • The CLES ScanningDOAS was operational from May 2023.
Example view of Scanning DOAS data

SO₂ Concentrations

Spectra collected at multiple elevation angles yield SO₂ concentrations across plume transects.

Emission Rates

By combining measured SO₂ concentrations with wind speed and direction, flux estimates are produced and streamed in near real time.