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Hazard maps showing the probability of reaching a given mass accumulation (a–c) and isomass map for a given probability threshold (d)

Cotopaxi, Ecuador, 2013

Figure 7 in: Biass, S., & Bonadonna, C. (2013). A fast GIS-based risk assessment for tephra fallout: the example of Cotopaxi volcano, Ecuador. Natural Hazards, 65, 477-495. https://doi.org/10.1007/s11069-012-0378-z



This hazard map is the result of scientific research and was published in academic literature. It is presented here to serve as an example of the map type or the map-making methodology. It is NOT the official, operational map. For the current operational hazard map, please consult the proper institutional authorities.


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Map Data

Map ID3763
Hazard Process(es)Tephra fall
Hazard Zone PresentationSingle hazard: A single hazard process is represented on a series of small map panels of similar sizes
Temporal ScaleBackground, or long-term, map
Spatial ScaleVolcano and surrounding area
Publication FormatFigure in a journal article
Zonation Method(s)Probabilistic modeling
Zonation Model(s)Tephra2 (Bonadonna et al. 2005; Bonadonna et al. 2010; Connor et al. 2011); TephraProb (Biass et al. 2016)
Scenario(s) ConsideredSeason or weather; Size, VEI, or intensity
Hazard Zone Label(s)Estimated value or Hazard Impact Metric; Numeric probability
Probability Definition(s)Numeric probability
PurposeScientific interest: Intended for scientific research and general scientific interest; usually published in academic journals
AudienceScientists (usually in scientific publication)
Language(s)English
Basemap(s)Inhabited areas
Basemap overlay(s)
DiemsionalityPlanimetric (2D or map) view
Color SchemeSymbols and/or lines only
Go to Global Volcanism Program page for Cotopaxi →