Title

Soil222 Rn Pulse during the Initial Phase of the June–August 1995 Eruption of Cerro Negro, Nicaragua

Document Type

Article

Publication Date

9-1996

Keywords

cinder, cone, radon, eruption, Cerro Negro, Nicaragua

Digital Object Identifier (DOI)

https://doi.org/10.1016/0377-0273(96)00020-0

Abstract

The June–August 1995 eruption of Cerro Negro, a small-volume basaltic cinder cone in Nicaragua, provided a unique opportunity to quantify 222Rn degassing from soils in response to explosive volcanic activity. 222Rn was monitored at 29 stations using electrostatically charged teflon 222Rn detectors distributed north and southeast of the volcano. A pulse of elevated 222Rn degassing occurred early in the eruption along a > 1 km long zone, extending at least 750 m beyond the base of the cinder cone. Observation of this 222Rn pulse shows that large changes in soil 222Rn concentration can occur simultaneously at widely separated stations in response to even comparatively small-volume intrusions and volcanic eruptions. Frequent 222Rn sampling at multiple stations provides a sense of the magnitude, time scales and area affected by convective gas transport during volcanic eruptions.

Was this content written or created while at USF?

No

Citation / Publisher Attribution

Journal of Volcanology and Geothermal Research, v. 73, issues 1-2, p. 119-127

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