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EarthquakeData
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EarthquakeData

For general access to the Wolfram Knowledgebase, use entities of type Earthquake instead of EarthquakeData.

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gives all earthquake properties for the location corresponding to loc.

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EarthquakeData[loc,mag]

restricts earthquakes returned to the magnitude range mag.

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EarthquakeData[loc,mag,{start,end}]

gives earthquake data within the magnitude range mag during the time interval start to end.

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EarthquakeData[loc,mag,{start,end},property]

gives a time series for the specific earthquake property for earthquakes within the magnitude range mag during the time interval start to end.

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EarthquakeData[entity,property]

returns data for a specific earthquake.

Details and Options

  • The location loc can be given as a GeoPosition, {lat,lon}, or {{lat,lon},radius}. radius can be given as a Quantity or a number, in which case it is presumed to be in meters. If no radius is given, a default value of 100 kilometers is used.
  • The location can also be given as a region, using Entity, GeoDisk, Polygon, and Rectangle specifications.
  • The identifier entity for an earthquake is the same as the value of the "Identifier" property. It consists of the two-digit network code and the identification number for that earthquake. Not all earthquakes have a unique identifier.
  • The magnitude mag can be specified as a single value designating a minimum magnitude or as {mag1,mag2} to specify a range of values. Values are assumed to be in the moment magnitude scale or MMS.
  • Dates can be specified as a DateObject or in DateList format.
  • Location, magnitude, and date can also be specified together as Association["Location"->locationspec,"Magnitude"mag,"Date"datespec].
  • The option TimeZone->z allows different time zones to be assumed.
  • The following settings can be used:
  • 0UTC
    $TimeZonethe current time zone for your computer system
    zoffset z for UTC
  • EarthquakeData returns an Association, using earthquake entities as keys. Individual properties are also keys in interior associations.
  • Full properties of EarthquakeData can be obtained by using EarthquakeData["Properties"].
  • Properties that can be specified include:
  • "AzimuthalGap"largest azimuthal gap between azimuthally adjacent stations
    "Depth"depth of the earthquake in kilometers
    "Identifier"network code and event identifier for the earthquake
    "Position"latitude, longitude of earthquake
    "Magnitude"magnitude of earthquake
  • When properties are specified, EarthquakeData returns an EventSeries.
  • Additional properties accessible through general queries include:
  • "PositionMethod"method used to determine location
    "Magnitude"magnitude of earthquake
    "MagnitudeType"method used to measure magnitude
    "NumberOfPhases"number of P and S arrival time observations used to compute the hypocenter location
    "NumberOfStations"number of seismic stations that reported P and S arrival times for this earthquake

Examples

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Basic Examples  (3)Summary of the most common use cases

Find historical earthquakes near a given location:

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https://wolfram.com/xid/0rkj2i17gfl6deq-wfbrv4
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https://wolfram.com/xid/0rkj2i17gfl6deq-wwuqem
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Out[2]=2
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In[3]:=3
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https://wolfram.com/xid/0rkj2i17gfl6deq-2exxu0
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Out[3]=3

Discover powerful earthquakes around the world:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-n6teyq
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-lslr04
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Out[2]=2

Explore the history of earthquakes for a region:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-x4tbip
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-f548c6
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Scope  (14)Survey of the scope of standard use cases

Location  (6)

Search for earthquakes near a given latitude and longitude:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-emnits
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Out[1]=1

Specify a radius to search either as a number (in kilometers) or as a Quantity:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-br5tn
Direct link to example
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Entity can be used to find earthquakes near a given location:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-n3b2fr
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-xq28sp
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Out[2]=2

Specify a range of longitudes and latitudes within which the earthquake must be:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-1v42ex
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-0nfs0p
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Out[2]=2

Discover all known earthquakes within a triangular region using Polygon:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-bxpvwe
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https://wolfram.com/xid/0rkj2i17gfl6deq-ydt60r
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https://wolfram.com/xid/0rkj2i17gfl6deq-dgsz9n
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Out[3]=3

GeoDisk can be used to specify a search region:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-eoes6t
Direct link to example
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-ut6u5z
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Out[2]=2

Identifier  (1)

Find the identifiers for various earthquakes:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-e290a1
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Out[1]=1

Using the identifier, you can query for a specific earthquake directly:

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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-sw9jnb
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Out[2]=2

Magnitude  (2)

Specify a lower limit on earthquake magnitudes returned:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-byy9ev
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-kstf88
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Out[2]=2

Restrict earthquake results to between an upper and lower limit of magnitude:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-lorba2
Direct link to example
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-k81fbz
Direct link to example
Out[2]=2

Date  (1)

Search for earthquakes within a specific date range:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-1ytg0s
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Copy to clipboard.
In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-737vah
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Out[2]=2

Property  (2)

Find all properties for EarthquakeData:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-rj1yhu
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Out[1]=1

Examine other properties of earthquakes, such as the recorded depth of the earthquake:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-eyc05y
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Out[1]=1

Association Specification  (2)

Date, magnitude, and location can be specified together using Association:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-gwhag8
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Association specification works with property arguments:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-ybijtu
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Out[1]=1

Options  (1)Common values & functionality for each option

TimeZone  (1)

Find earthquakes on Dec 21, 2012:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-vc7ob7
Direct link to example
Out[1]=1

The date specification is given by default in your time zone, as given by $TimeZone:

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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-c0eu6p
Direct link to example
Out[2]=2

Use the TimeZone option to specify the time zone of the output date objects:

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In[3]:=3
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https://wolfram.com/xid/0rkj2i17gfl6deq-t1b7g2
Direct link to example
Out[3]=3

Use DateObject specifications to control the time zone of the dates in input:

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In[4]:=4
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https://wolfram.com/xid/0rkj2i17gfl6deq-j21rtn
Direct link to example
Out[4]=4

Applications  (3)Sample problems that can be solved with this function

Examine the recorded depths versus magnitudes of earthquakes in Japan:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-bglzha
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-2gc2mm
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Out[2]=2

Observe the frequency of recorded earthquakes as a function of their magnitude:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-yjq2du
Direct link to example
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-8qdrt3
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Out[2]=2

Compare the number of recorded earthquakes since 1980 within 100 kilometers of the capital cities of Europe:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-g33qkn
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-1del16
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Out[2]=2

Neat Examples  (4)Surprising or curious use cases

Calculate the seismic moment from the moment magnitude scale for the 2011 Tōhoku earthquake:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-zp2t2l
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Out[1]=1

Extract the formula for from FormulaData:

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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-n8r9jn
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Out[2]=2
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In[3]:=3
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https://wolfram.com/xid/0rkj2i17gfl6deq-cw1y38
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Out[3]=3

Visualize the recorded depths of earthquakes and their locations within California:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-nxizf0
Direct link to example
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-jtmqod
Direct link to example
Out[2]=2

Map major world earthquakes recorded over the past two decades:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-nk6clu
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Out[1]=1
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In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-rpn9ln
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In[3]:=3
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https://wolfram.com/xid/0rkj2i17gfl6deq-hkioiw
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Out[3]=3

Examine the calculated depths of earthquakes across the world:

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In[4]:=4
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https://wolfram.com/xid/0rkj2i17gfl6deq-0x61ku
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In[5]:=5
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https://wolfram.com/xid/0rkj2i17gfl6deq-kw6ir0
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Out[5]=5
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In[6]:=6
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https://wolfram.com/xid/0rkj2i17gfl6deq-e8snr4
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Out[6]=6

Examine recorded earthquakes in and around California:

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In[1]:=1
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https://wolfram.com/xid/0rkj2i17gfl6deq-cwk01p
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Copy to clipboard.
In[2]:=2
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https://wolfram.com/xid/0rkj2i17gfl6deq-uwn9ba
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Out[2]=2
Wolfram Research (2014), EarthquakeData, Wolfram Language function, https://reference.wolfram.com/language/ref/EarthquakeData.html.
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Wolfram Research (2014), EarthquakeData, Wolfram Language function, https://reference.wolfram.com/language/ref/EarthquakeData.html.

Text

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

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

CMS

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

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

APA

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

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

BibTeX

@misc{reference.wolfram_2025_earthquakedata, author="Wolfram Research", title="{EarthquakeData}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/EarthquakeData.html}", note=[Accessed: 26-March-2025 ]}

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@misc{reference.wolfram_2025_earthquakedata, author="Wolfram Research", title="{EarthquakeData}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/EarthquakeData.html}", note=[Accessed: 26-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_earthquakedata, organization={Wolfram Research}, title={EarthquakeData}, year={2014}, url={https://reference.wolfram.com/language/ref/EarthquakeData.html}, note=[Accessed: 26-March-2025 ]}

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@online{reference.wolfram_2025_earthquakedata, organization={Wolfram Research}, title={EarthquakeData}, year={2014}, url={https://reference.wolfram.com/language/ref/EarthquakeData.html}, note=[Accessed: 26-March-2025 ]}