Earthquake alerts

The following sections describe earthquake alerts.

Alert area

Note: Specify the value of the <area> entity as the alerting area, not the incident area. To identify the users who receive an earthquake alert, Google uses the <area> entity.

• If you use a <circle> entity to specify an earthquake's epicenter, add a non-zero radius instead of a single point:

  • Zero-radius circles are considered empty objective areas that Google Public Alerts doesn't support.

  • Depending on an earthquake's magnitude of depth, your system can select a radius from a set of predetermined radii values.

• Many earthquakes are centered in remote or offshore locations. Therefore, we recommend that you specify the value of the <areaDesc> element in terms of the epicenter's distance and direction from a more populated or better known area.

  Example: <areaDesc>10 km SW of Christchurch</areaDesc>

• If you have an intensity shakemap image, epicenter map image, or other rich media sources, then you can use the <resource> element to specify the type and content of the resource file.

Additional parameters

To describe the earthquake's strength and intensity in <parameter> objects, Public Alerts also accepts the element value pairs shown in the following code snippet.

<parameter>
      <valueName>Magnitude</valueName>
      <value>6.1</value>
</parameter>
<parameter>
      <valueName>EventDepth</valueName>
      <value>12 km</value>
</parameter>

Examples

<?xml version="1.0" encoding="UTF-8"?>
<alert xmlns="urn:oasis:names:tc:emergency:cap:1.2">
  <identifier>Indonesia-InaTEWS-earthquakes-20230415221056</identifier>
  <sender>[e-mail]</sender>
  <sent>2023-04-15T22:10:56+07:00</sent>
  <status>Actual</status>
  <msgType>Alert</msgType>
  <scope>Public</scope>
  <addresses>0</addresses>
  <code>profile:BMKG-Versi:1</code>
  <info>
      <language>id</language>
      <category>Geo</category>
      <event>Gempabumi</event>
      <urgency>Past</urgency>
      <severity>Unknown</severity>
      <certainty>Observed</certainty>
      <onset>2023-04-15T22:10:56+07:00</onset>
      <expires>2023-04-23T08:10:56+07:00</expires>
      <senderName>BMKG</senderName>
      <headline>Info Gempa kekuatan:6.2 SR, 15-Apr-23 22:07:07 WIB, (64 km
       BaratDaya KAUR-BENGKULU) ::BMKG -- Informasi sementara</headline>
      <description>Telah Terjadi gempabumi dengan kekuatan: 6.2 SR, 64 km
       BaratDaya KAUR-BENGKULU, waktu gempa: 15-Apr-23 22:07:07 WIB, Gempa
       ini tidak berpotensi TSUNAMI (Event ini sudah direview oleh
       seismologist.)</description>
      <instruction>Hati-hati terhadap gempabumi susulan yang mungkin
       terjadi</instruction>
      <web>https://inatews.bmkg.go.id</web>
      <contact>https://bmkg-content-inatews.storage.googleapis.com/kontakbmkg.html</contact>
      <parameter>
        <valueName>EventLocationName</valueName>
        <value>Lima wilayah terdekat: 64 km BaratDaya KAUR-BENGKULU, 70 km
         BaratDaya BENGKULUSELATAN, 99 km Tenggara SELUMA-BENGKULU, 142 km
         Tenggara BENGKULU-BENGKULU, dan 462 km BaratLaut
         JAKARTA-INDONESIA</value>
      </parameter>
      <parameter>
        <valueName>ShortLocationName</valueName>
        <value>64 km BaratDaya KAUR-BENGKULU</value>
      </parameter>
      <parameter>
        <valueName>EventOriginTime</valueName>
        <value>2023-04-15T22:07:07+07:00</value>
      </parameter>
      <parameter>
        <valueName>EventMagnitude</valueName>
        <value>6.2</value>
      </parameter>
      <parameter>
        <valueName>EventDepth</valueName>
        <value>23 km</value>
      </parameter>
      <resource>
        <resourceDesc>Peta Episenter</resourceDesc>
        <mimeType>image/gif</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.gif</uri>
      </resource>
      <resource>
        <resourceDesc>Peta Intensitas Guncangan</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.mmi.jpg</uri>
      </resource>
      <resource>
        <resourceDesc>Peta Peak Ground Acceleration</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.pga.jpg</uri>
      </resource>
      <resource>
        <resourceDesc>Peta Peak Ground Velocity</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.pgv.jpg</uri>
      </resource>
      <area>
        <areaDesc>64 km BaratDaya KAUR-BENGKULU, 70 km BaratDaya
         BENGKULUSELATAN, 99 km Tenggara SELUMA-BENGKULU, 142 km Tenggara
         BENGKULU-BENGKULU, dan 462 km BaratLaut
         JAKARTA-INDONESIA</areaDesc>
        <circle>-4.93,102.85 300.0</circle>
      </area>
  </info>
  <info>
      <language>en</language>
      <category>Geo</category>
      <event>Earthquake</event>
      <urgency>Past</urgency>
      <severity>Unknown</severity>
      <certainty>Observed</certainty>
      <onset>2023-04-15T22:10:56+07:00</onset>
      <expires>2023-04-23T08:10:56+07:00</expires>
      <senderName>BMKG</senderName>
      <headline>Earthquake mag:6.2, 15-Apr-23 15:07:07 UTC, (64 km SouthWest
       KAUR-BENGKULU) ::BMKG -- PRELIMINARY REPORT</headline>
      <description>An earthquake has occurred with magnitude: 6.2 SR, 64 km
       SouthWest KAUR-BENGKULU, at: 15-Apr-23 15:07:07 UTC, No TSUNAMI
       threat (This event has been reviewed by a
       seismologist.)</description>
      <instruction>Be careful of aftershocks</instruction>
      <web>https://inatews.bmkg.go.id</web>
      <contact>https://bmkg-content-inatews.storage.googleapis.com/kontakbmkg.html</contact>
      <parameter>
        <valueName>EventLocationName</valueName>
        <value>Five nearest area: 64 km SouthWest KAUR-BENGKULU, 70 km
         SouthWest BENGKULUSELATAN, 99 km SouthEast SELUMA-BENGKULU, 142 km
         SouthEast BENGKULU-BENGKULU, and 462 km NorthWest
         JAKARTA-INDONESIA</value>
      </parameter>
      <parameter>
        <valueName>ShortLocationName</valueName>
        <value>Southern Sumatra, Indonesia </value>
      </parameter>
      <parameter>
        <valueName>EventOriginTime</valueName>
        <value>2023-04-15T22:07:07+07:00</value>
      </parameter>
      <parameter>
        <valueName>EventMagnitude</valueName>
        <value>6.2</value>
      </parameter>
      <parameter>
        <valueName>EventDepth</valueName>
        <value>23 km</value>
      </parameter>
      <resource>
        <resourceDesc>Epicenter Map</resourceDesc>
        <mimeType>image/gif</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.gif</uri>
      </resource>
      <resource>
        <resourceDesc>Intensity Shakemap</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.mmi.jpg</uri>
      </resource>
      <resource>
        <resourceDesc>Peak Ground Acceleration Shakemap</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.pga.jpg</uri>
      </resource>
      <resource>
        <resourceDesc>Peak Ground Velocity Shakemap</resourceDesc>
        <mimeType>image/jpeg</mimeType>
        <uri>https://bmkg-content-inatews.storage.googleapis.com/20230415221056.pgv.jpg</uri>
      </resource>
      <area>
        <areaDesc>64 km SouthWest KAUR-BENGKULU, 70 km SouthWest
         BENGKULUSELATAN, 99 km SouthEast SELUMA-BENGKULU, 142 km SouthEast
         BENGKULU-BENGKULU, and 462 km NorthWest
         JAKARTA-INDONESIA</areaDesc>
        <circle>-4.93,102.85 300.0</circle>
      </area>
  </info>
</alert>