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Novarupta reported activity




Event Name : Novarupta 2017/11

Start:November 10, 2017 Observed
Stop:November 13, 2017 Observed

Remobilized tephra - no eruption: BibCard
Eruption Type:Not an eruption.

Description: From Dixon and others (2020): "On June 4, 2017, a National Oceanic and Atmospheric Administration (NOAA) and National Environmental Satellite, Data, and Information Service ash alert reported a possible resuspension event over the Valley of Ten Thousand Smokes (fig. 9). Atypical, easterly winds carried resuspended ash away from population centers so that an AVO Information Statement was not issued. AVO alerted the NWS Alaska Aviation Weather Unit * * * ,

"Two ash resuspension events were detected in November, and the first was identified by a NOAA and Cooperative Institute for Meteorological Satellite Studies ash alert. On November 10, strong northwest winds over the Valley of Ten Thousand Smokes resuspended volcanic ash into a visible cloud and transported it eastward across Shelikof Strait and over Kodiak Island, where it was detected by the AVO particulate monitors at Larson Bay on the west coast of Kodiak Island. A similar sensor in the city of Kodiak, Alaska, on the east coast of Kodiak Island did not record any ash for this episode. AVO issued an Information Statement corroborating the hazard notifications issued by the NWS. By the evening of November 10, the resuspension event started to wane despite the surface winds continuing with gusts up to 20 meters per second (66 feet per second). A similar resuspension event occurred on November 13. The resuspended ash cloud extended 120 km (72 mi) to the southeast over the south end of Kodiak Island where no particulate monitors were installed. (fig. 10). AVO issued another Information Statement after the detection of this resuspension event."

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Page modified: March 30, 2017 14:36
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