Is it possible or practical to predict vog? The Vog Measurement and Prediction Project (VMAP) is a feasibility study in which scientists will evaluate [are evaluating] whether vog forecasts are achievable and useful. Project collaborators are making the feasibility study available to the public through this Web site, but as an ongoing investigation, VMAP currently provides limited service and reliability. Thus, VMAP users should have no expectation of accuracy or timeliness, and project data should not be used for decision making purposes at this time. Comments and inquiries can be directed to the appropriate contact.

Vog is primarily a mixture of sulfur dioxide (SO2) gas and sulfate (SO4) aerosol. SO2 (invisible) reacts with oxygen and moisture in the air to produce SO4 aerosol (visible). SO2 is expected to be the main problem in areas near the vent (Hawai`i Volcanoes National Park, Pahala, Na`alehu, Hawaiian Ocean View Estates) and SO4 aerosol is expected to be the main problem at locations far from the vent (Kona and farther north and west).

 

Forecast Discussion

Current Measured Conditions:

Due to lack of funding, the forecast discussion is no longer being supported. For the latest sulfur dioxide emissions rates, please refer to the USGS eruption update. For the latest sulfur dioxide and aerosol concentrations, please refer to the current conditions table.

Forecast issued by: Roy Huff

 

Click the image below to view meteograms for each location.

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Photograph by M. Poland, November 13, 2008, USGS HVO.

 

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