For general access to the Wolfram Knowledgebase, use entities of type Volcano instead of VolcanoData.


gives the value of the specified property for the volcano entity.


gives a list of property values for the specified volcano entities.


gives the specified annotation associated with the given property.


  • VolcanoData[] gives a list of all volcano entities.
  • VolcanoData["Properties"] gives a list of available properties.
  • The specified entity in VolcanoData can be an Entity, EntityClass, entity canonical name, or list thereof.
  • The specified property can be an EntityProperty, EntityPropertyClass, property canonical name, or list of properties.
  • Properties that do not apply or are not known in a particular case are indicated by Missing[].
  • Properties include:
  • "Coordinates"coordinates
    "EruptionsStandardName"notable eruptions
    "LastKnownEruptionDate"last known eruption
    "SubregionName"subregion name
  • Some properties are available for VolcanoData as a whole and can be given using the form VolcanoData[property]. Such properties include:
  • "Entities"all available entities
    "EntityCount"total number of available entities
    "Classes"all available entity classes
    "EntityClassCount"total number of available entity classes
    "SampleEntities"list of sample entities
    "SampleEntityClasses"list of sample entity classes
    "EntityCanonicalNames"list of all entity canonical names
    "PropertyCanonicalNames"list of all property canonical names
    "EntityClassCanonicalNames"list of all entity class canonical names
    "RandomEntities"pseudorandom sample entities
    {"RandomEntities",n}n pseudorandom entities
    "RandomEntityClasses"pseudorandom sample entity classes
    {"RandomEntityClasses",n}n pseudorandom entity classes
  • The following annotations can be used in the third argument of VolcanoData[entity,property,annotation]:
  • "Qualifiers"the list of possible qualifiers for the property
    "QualifierValues"the list of possible values that can be given to each qualifier
    "DefaultQualifierValues"the list of default values for the property's qualifiers
    "Description"a brief textual description of the property
    "Definition"a detailed textual definition of the property
    "Source"source information for the property
    "Date"the date associated with the entity-property value (if any)
    "PhysicalQuantity"the physical quantity associated with the entity-property value
    "Unit"the unit associated with the entity-property value
    "EntityAssociation"an association of entities and entity-property values
    "PropertyAssociation"an association of properties and entity-property values
  • If a function is provided as an annotation, it will be used to aggregate the result data. Typical aggregation functions include:
  • Minthe minimum value
    Maxthe maximum value
    Meanthe mean value
    Commonestthe most frequently occurring value
    Medianthe median value
    Totalreturns the total
    Lengththe number of elements


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Basic Examples  (6)

Get a list of all volcanoes:

Get the list of properties associated with volcanoes:

Get coordinates for a specific volcano entity:

Get properties for a class of volcanoes:

Get an Association of results from an EntityClass:

Specifying an aggregation function for results of a VolcanoData query:

Use for entity discovery:

Use to discover properties of a volcano:

Explore properties of a volcano:

Compare properties of multiple volcanoes:

Scope  (6)

Find the total number of available volcano entities:

Find the total number of available entity classes:

Get a list of sample entities:

"SampleEntities" are not randomized; for a pseudorandom sample, use "RandomEntities":

Get a list of member entities for an entity class:

"EntityCanonicalNames" can be used to get the canonical names, rather than full Entity expressions:

Get the list of available properties:

Get the list of canonical property names:

Get an association of all properties for a given entity:

Get annotation information for a VolcanoData property:

Get an association of property values for an EntityClass:

Possible Issues  (1)

Use for entity discovery, and CanonicalName to identify the canonical entity name:

Neat Examples  (1)

Make a map of the volcanoes in Chile that are on the border with other countries:

Wolfram Research (2014), VolcanoData, Wolfram Language function, https://reference.wolfram.com/language/ref/VolcanoData.html.


Wolfram Research (2014), VolcanoData, Wolfram Language function, https://reference.wolfram.com/language/ref/VolcanoData.html.


Wolfram Language. 2014. "VolcanoData." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/VolcanoData.html.


Wolfram Language. (2014). VolcanoData. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/VolcanoData.html


@misc{reference.wolfram_2024_volcanodata, author="Wolfram Research", title="{VolcanoData}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/VolcanoData.html}", note=[Accessed: 20-July-2024 ]}


@online{reference.wolfram_2024_volcanodata, organization={Wolfram Research}, title={VolcanoData}, year={2014}, url={https://reference.wolfram.com/language/ref/VolcanoData.html}, note=[Accessed: 20-July-2024 ]}